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MPLS OAM Commands
This module describes Multiprotocol Label Switching (MPLS) label switched path (LSP) verification commands. These commands provide a means to detect and diagnose data plane failures and are the first set of commands in the MPLS Operations, Administration, and Maintenance (OAM) solution.
For detailed information about MPLS concepts, configuration tasks, and examples, see .
- clear mpls oam counters
- echo disable-vendor-extension
- echo revision
- mpls oam
- ping mpls ipv4
- ping mpls traffic-eng
- ping pseudowire (AToM)
- ping mpls traffic-eng tunnel-te (P2P)
- show mpls oam
- show mpls oam database
- traceroute mpls ipv4
- traceroute mpls multipath
- traceroute mpls traffic-eng
- traceroute mpls traffic-eng tunnel-te (P2P)
clear mpls oam counters
Syntax Description
global
Clears global counters.
interface
Clears counters on a specified interface.
type
Interface type. For more information, use the question mark (?) online help function.
interface-path-id
Physical interface or virtual interface.
Note Use the show interfaces command to see a list of all interfaces currently configured on the router.
For more information about the syntax for the router, use the question mark (?) online help function.
packet
Clears global packet counters.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
echo disable-vendor-extension
To disable sending the vendor extension type length and value (TLV) in the echo request, use the echo disable-vendor extension command in MPLS OAM configuration mode. To return to the default behavior, use the no form of this command.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
echo revision
To set the echo packet revision, use the echo revision command in MPLS OAM configuration mode. To return to the default behavior, use the no form of this command.
Syntax Description
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
mpls oam
To enable MPLS OAM LSP verification, use the mpls oam command in global configuration mode. To return to the default behavior, use the no form of this command.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The mpls oam command and OAM functionality is described in the IETF LSP ping draft.
Task ID
ping mpls ipv4
To check MPLS host reachability and network connectivity by specifying the destination type as a Label Distribution Protocol (LDP) IPv4 address, use the ping mpls ipv4 command in EXEC mode.
ping mpls ipv4 address/mask [ destination start-address end-address increment ] [dsmap] [ exp exp-bits ] [force-explicit-null] [ interval min-send-delay ] [ output interface type interface-path-id [ nexthop nexthop-address ] ] [ pad pattern ] [ repeat count ] [ reply { dscp dscp-value | reply mode { ipv4 | no-reply | router-alert } | reply pad-tlv } ] [ revision version ] [ size packet-size ] [ source source-address ] [ sweep min value max value increment ] [ timeout timeout ] [ ttl value ] [verbose] [ fec-type { bgp | generic | ldp } ]
Syntax Description
Command Default
exp exp bits: 0
interval min-send-delay: 0
repeat count : 5
reply-mode: IPv4
timeout timeout : 2
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The output interface keyword specifies the output interface on which the MPLS echo request packets are sent. If the specified output interface is not part of the LSP, the packets are not transmitted.
In cases where the sweep keyword is used, values larger than the outgoing interface’s MTU are not transmitted.
The ping command sends an echo request packet to an address, and then awaits a reply. Ping output can help you evaluate path-to-host reliability, delays over the path, and whether the host can be reached or is functioning.
Note
The ping mpls command is not supported on optical LSPs. If an optical LSP is encountered along the LSP's path, it is treated as a physical interface.
For detailed configuration information about the MPLS ping command, see System Monitoring Configuration Guide .
Task ID
Examples
The following example shows the destination type as a label distribution protocol (LDP) prefix and specifies a range of sizes for the echo packets sent:
RP/0/RP0/CPU0:router# ping mpls ipv4 140.140.140/32 verbose sweep 100 200 15 repeat 1 Sending 1, [100..200]-byte MPLS Echos to 140.140.140.140/32, timeout is 2 seconds, send interval is 0 msec: Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. ! size 100, reply addr 196.100.1.26, return code 3 ! size 115, reply addr 196.100.1.26, return code 3 ! size 130, reply addr 196.100.1.26, return code 3 ! size 145, reply addr 196.100.1.26, return code 3 ! size 160, reply addr 196.100.1.26, return code 3 ! size 175, reply addr 196.100.1.26, return code 3 ! size 190, reply addr 196.100.1.26, return code 3 Success rate is 100 percent (7/7), round-trip min/avg/max = 5/6/8 msThe following example shows the destination type as a label distribution protocol (LDP) prefix and specifies FEC type as generic and verbose option:
RP/0/RP0/CPU0:router# ping mpls ipv4 11.11.11.11/32 fec-type generic output interface gigabitEthernet 0/0/0/3 nexthop 172.40.103.2 verbose Sending 5, 100-byte MPLS Echos to 11.11.11.11/32, timeout is 2 seconds, send interval is 0 msec: Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. ! size 100, reply addr 11.101.11.11, return code 3 ! size 100, reply addr 11.101.11.11, return code 3 ! size 100, reply addr 11.101.11.11, return code 3 ! size 100, reply addr 11.101.11.11, return code 3 ! size 100, reply addr 11.101.11.11, return code 3 Success rate is 100 percent (5/5), round-trip min/avg/max = 3/4/6 msping mpls traffic-eng
To specify the destination type as an MPLS-TE tunnel and tunnel interface, use the ping mpls traffic-eng command in EXEC mode.
ping mpls traffic-eng tunnel tunnel-ID [ dsmap ] [ exp exp-bits ] [ force-explicit-null ] [ interval min-send-delay ] [ pad pattern ] [ repeat count ] [ reply { dscp dscp-value | reply mode { ipv4 | no-reply | router-alert } | reply pad-tlv } ] [ revision version ] [ size packet-size ] [ source source-address ] [ sweep min-value max-value increment ] [ timeout timeout ] [ ttl value ] [verbose]
Syntax Description
tunnel tunnel-ID
Specifies the destination type as an MPLS traffic engineering (TE) tunnel and the tunnel interface number. The range for the tunnel interface number is from 0 to 65535.
dsmap
(Optional) Indicates that a downstream mapping (DSMAP) type length and value should be included in the LSP echo request.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
interval min-send-delay
(Optional) Specifies a send interval, in milliseconds, between requests. Range is 0 to 3600000. Default is 0.
pad pattern
(Optional) Specifies the pad pattern for an echo request.
repeat count
(Optional) Specifies the number of times to resend a packet. Range is 1 to 2147483647. Default is 5.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply mode [ipv4 | router-alert | no-reply ]
- no-reply
Do not reply
- ipv4
Reply with an IPv4 UDP packet (this is the default)
- router-alert
Reply with an IPv4 UDP packet with the IP router alert set
reply pad-tlv
(Optional) Indicates that a pad TLV should be included.
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
size packet-size
(Optional) Specifies the packet size or number of bytes in each MPLS echo request packet. Range is 100 to 17986. Default is 100.
source source-address
(Optional) Specifies the source address used in the echo request packet.
sweep min-value max-value interval
- min-value
Minimum or start size for an echo packet (range is 100 to 17986)
- max-value
Maximum or end size for an echo packet(range is 100 to 17986)
- interval
Number used to increment an echo packet size(range is 1 to 8993)
timeout timeout
(Optional) Specifies the timeout interval, in seconds. Range is 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the TTL value to be used in the MPLS labels (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command Default
exp exp-bits: 0
interval min-send-delay: 0
repeat count: 5
reply-mode: IPv4
timeout timeout : 2
Command History
Release
Modification
Release 4.0.0
This command was introduced. This command was replaced by the ping mpls traffic-eng tunnel-te (P2P) command.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The output interface keyword specifies the output interface on which the MPLS echo request packets are sent. If the specified output interface is not part of the LSP, the packets are not transmitted.
In cases where the sweep keyword is used, values larger than the outgoing interface’s MTU are not transmitted.
The ping command sends an echo request packet to an address, and then awaits a reply. Ping output can help you evaluate path-to-host reliability, delays over the path, and whether the host can be reached or is functioning.
Note
The ping mpls traffic-eng command is not supported on optical LSPs. If an optical LSP is encountered along the LSP's path, it is treated as a physical interface.
Task ID
Examples
The following example shows how to check connectivity by using the ping mpls traffic-eng command when a TE tunnel 10 is present. Return code, reply address, and packet size are displayed due to the verbose keyword.
RP/0/RP0/CPU0:router# ping mpls traffic-eng tunnel 10 repeat 1 verbose Sending 1, 100-byte MPLS Echos to tunnel-te10, timeout is 2 seconds, send interval is 0 msec: Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. ! size 100, reply addr 196.100.1.18, return code 3 Success rate is 100 percent (1/1), round-trip min/avg/max = 15/15/15 msping pseudowire (AToM)
To verify connectivity between provider edge (PE) LSRs in an Any Transport over MPLS (AToM) setup, use the ping pseudowire command in EXEC mode.
ping [mpls] pseudowire remote-PE -address pw-id [ exp exp-bits ] [ interval min-send-delay ] [ pad pattern ] [ repeat count ] [ reply { dscp dscp-value | reply mode { ipv4 | no-reply | router-alert | control-channel } | reply pad-tlv } ] [ size packet-size ] [ source source-address ] [ sweep min-value max-value increment ] [ timeout timeout ] [ ttl value ] [verbose]
Syntax Description
mpls
(Optional) Verifies the Labeled Switch Path (LSP).
remote-PE address
IP address of the remote PE LSR.
pw-id
Pseudowire ID that identifies the pseudowire in which MPLS connectivity is being verified. The pseudowire is used to send the echo request packets. The range is from 1 to 4294967295.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
interval min-send-delay
(Optional) Specifies a send interval, in milliseconds, between requests. Range is 0 to 3600000. Default is 0.
pad pattern
(Optional) Specifies the pad pattern for an echo request.
repeat count
(Optional) Specifies the number of times to resend a packet. Range is 1 to 2147483647. Default is 5.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply mode {ipv4 | router-alert | no-reply | control-channel}
- no-reply
Do not reply
- ipv4
Reply with an IPv4 UDP packet (the default)
- router-alert
Reply with an IPv4 UDP packet with the IP router alert set
- control-channel
Force the use of a VCCV control channel.
Reply using an application for a defined control channel. This applies only to pseudowires in which VCCV is used in the reply path. This is the default choice for pseudowire ping.
reply pad-tlv
(Optional) Indicates that a reply pad TLV should be included.
size packet-size
(Optional) Specifies the packet size or number of bytes in each MPLS echo request packet. Range is 100 to 17986. Default is 100.
source source-address
(Optional) Specifies the source address used in the echo request packet.
sweep min-value max-value interval
- min-value
Minimum or start size for an echo packet (range is 100 to 17986)
- max-value
Maximum or end size for an echo packet(range is 100 to 17986)
- interval
Number used to increment an echo packet size(range is 1 to 8993)
timeout timeout
(Optional) Specifies the timeout interval in seconds. Range is 0 to 3600. Default is 2 seconds.
ttl value
(Optional) Specifies the TTL value to be used in the MPLS labels (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command Default
exp exp bits: 0
interval min-send-delay: 0
repeat count: 5
reply-mode: IPv4
timeout timeout : 2
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
In cases in which the sweep keyword is used, values larger than the outgoing interface’s MTU are not transmitted.
The ping command sends an echo request packet to an address, and then awaits a reply. Ping output can help you evaluate path-to-host reliability, delays over the path, and whether the host can be reached or is functioning.
Note
The ping mpls command is not supported on optical LSPs. If an optical LSP is encountered along the LSP's path, it is treated as a physical interface.
AToM VCCV allows the sending of control packets inband of an AToM pseudowire (PW) from the originating provider edge (PE) router. The transmission is intercepted at the destination PE router, instead of being forwarded to the customer edge (CE) router. This lets you use MPLS LSP ping to test the pseudowire section of AToM virtual circuits (VCs).
The no interactive version of the ping pseudowire (AToM) command is supported.
The control word setting is either enabled along the entire path between the Terminating-Provider Edge (T-PE) or it is completely disabled. If the control word configuration is enabled on one segment and disabled on another segment, the multisegment pseudowire does not come up.
Task ID
Examples
The following example shows how the ping mpls pseudowire command is used to verify PE to PE connectivity in which the remote PE address is 150.150.150.150. Only one echo request packet is sent and the remote PE is to answer using IPv4 instead of the control channel.
RP/0/RP0/CPU0:router# ping mpls pseudowire 150.150.150.150 21 repeat 1 reply mode ipv4 Sending 1, 100-byte MPLS Echos to 150.150.150.150 VC: 21, timeout is 2 seconds, send interval is 0 msec: Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. ! Success rate is 100 percent (1/1), round-trip min/avg/max = 23/23/23 msping mpls traffic-eng tunnel-te (P2P)
To specify the destination type as an MPLS-TE tunnel and tunnel interface, use the ping mpls traffic-eng tunnel-te command in EXEC mode.
ping mpls traffic-eng tunnel-te tunnel-ID { destination start-address end-address increment } [ dsmap ] [ exp exp-bits ] [ force-explicit-null ] [ interval min-send-delay ] [ pad pattern ] [ repeat count ] [ reply { dscp dscp-value | mode { ipv4 | no-reply | router-alert } | pad-tlv } ] [ revision version ] [ size packet-size ] [ source source-address ] [ sweep min-value max-value increment ] [ timeout timeout ] [ ttl value ] [ verbose ]
Syntax Description
tunnel-te tunnel-ID
Specifies the destination type as an MPLS traffic engineering (TE) tunnel and the tunnel interface number. The range for the tunnel interface number is 0 to 65535.
destination start-address end-address increment
- start address
Start of the network address.
- end address
Start of the ending network address.
- address increment
Incremental value of the network address, which is expressed as a decimal number value or IP address.
dsmap
(Optional) Indicates that a downstream mapping (DSMAP) type length and value should be included in the LSP echo request.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
interval min-send-delay
(Optional) Specifies a send interval, in milliseconds, between requests. Range is 0 to 3600000. Default is 0.
pad pattern
(Optional) Specifies the pad pattern for an echo request.
repeat count
(Optional) Specifies the number of times to resend a packet. Range is 1 to 2147483647. Default is 5.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
mode [ipv4 | router-alert | no-reply ]
- no-reply
Do not reply
- ipv4
Reply with an IPv4 UDP packet (this is the default)
- router-alert
Reply with an IPv4 UDP packet with the IP router alert set
reply pad-tlv
(Optional) Indicates that a pad TLV should be included.
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
size packet-size
(Optional) Specifies the packet size or number of bytes in each MPLS echo request packet. Range is 100 to 17986. Default is 100.
source source-address
(Optional) Specifies the source address used in the echo request packet.
sweep min-value max-value interval
- min-value
Minimum or start size for an echo packet (range is 100 to 17986)
- max-value
Maximum or end size for an echo packet(range is 100 to 17986)
- interval
Number used to increment an echo packet size(range is 1 to 8993)
timeout timeout
(Optional) Specifies the timeout interval, in seconds. Range is 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the TTL value to be used in the MPLS labels (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command Default
exp exp-bits: 0
interval min-send-delay: 0
repeat count: 5
reply-mode: IPv4
timeout timeout : 2
Command History
Release Modification Release 4.0.0
This command was introduced. This command replaces the ping mpls traffic-eng command.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The output interface keyword specifies the output interface on which the MPLS echo request packets are sent. If the specified output interface is not part of the LSP, the packets are not transmitted.
In cases where the sweep keyword is used, values larger than the outgoing interface's MTU are not transmitted.
The ping command sends an echo request packet to an address, and then waits for a reply. Ping output helps you evaluate path-to-host reliability, delays over the path. It also helps you determine whether the host is reachable or is functioning.
Task ID
show mpls oam
Syntax Description
client
Displays clients registered with LSPV server.
counters global
Displays LSP verification global counters.
counters packet
Displays LSP verification packet counters.
counters interface
Displays LSP verification information for a specific interface.
type
Interface type. For more information, use the question mark (?) online help function.
interface-path-id
Physical interface or virtual interface.
Note Use the show interfaces command to see a list of all interfaces currently configured on the router.
For more information about the syntax for the router, use the question mark (?) online help function.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
show mpls oam database
Syntax Description
requests
Displays request database
tt-requests
Displays tree trace request database
detail
(Optional) Displays displayed information.
handle
(Optional) Displays handle information.
handle-value
Generic handle value. Range is from 0 to 4294967295.
Command History
Release
Modification
Release 4.0.0
The replies keyword was removed.
Release 5.0.0 This command was introduced.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
traceroute mpls ipv4
To learn the routes that packets follow when traveling to their Label Distribution Protocol (LDP) IPv4 destination, use the traceroute mpls command in EXEC mode.
traceroute mpls ipv4address/mask [ destination start-address end-address address-increment ] [ exp exp-bits ] [flags fec] [force-explicit-null] [ output interface type interface-path-id [ nexthop nexthop-address ] ] [ reply { dscp dscp-value | reply mode { ipv4 | router-alert } } ] [ revision version ] [ source source-address ] [ timeout timeout ] [ ttl value ] [verbose] [ fec-type { bgp | generic | ldp } ]
Syntax Description
address/mask
Specifies the destination type as a label distribution protocol (LDP) prefix. Address prefix of the target and number of bits in the target address network mask.
destination start-address end-address address-increment
- start address
Start of the network address.
- end address
End of the network address.
- address increment
Incremental value of the network address.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
flags fec
(Optional) Specifies that forwarding equivalent class (FEC) stack checking is to be performed at transit routers.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
output interface
(Optional) Specifies the output interface in which echo request packets are sent.
type
Interface type. For more information, use the question mark (?) online help function.
interface-path-id
Note Use the show interfaces command to see a list of all interfaces currently configured on the router.
For more information, use the question mark (?) online help function.
nexthop
(Optional) Specifies the IP address for the next hop.
nexthop-address
(Optional) IP address for the next hop.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply mode { ipv4 | router-alert}
- ipv4
Reply with IPv4 UDP packet (this is the default)
- router-alert
Reply with IPv4 UDP packet with router alert
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
source source-address
(Optional) Specifies the source address used in the echo request packet.
timeout timeoutt
(Optional) Specifies the timeout interval, in seconds. Range is from 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the maximum number of hops (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Note
The traceroute mpls command is not supported on optical LSPs. If an optical LSP is encountered along the LSPs path, it is treated as a physical interface.
For detailed configuration information about MPLS LSP trace operations, see .
Task ID
Examples
The following example shows how to trace a destination:
RP/0/RP0/CPU0:router# traceroute mpls ipv4 140.140.140.140/32 destination 127.0.0.10 127.0.0.15.1 Tracing MPLS Label Switched Path to 140.140.140.140/32, timeout is 2 seconds Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. Destination address 127.0.0.10 0 196.100.1.41 MRU 4470 [Labels: 19 Exp: 0] L 1 196.100.1.42 MRU 4470 [Labels: 86 Exp: 0] 360 ms 2 196.100.1.50 MRU 4470 [Labels: implicit-null Exp: 0] 8 ms ! 3 196.100.1.18 9 msThe following example shows how to trace a destination with FEC type specified as generic and verbose option:
RP/0/RP0/CPU0:router# traceroute mpls ipv4 11.11.11.11/32 fec-type generic output interface gigabitEthernet 0/0/0/3 nexthop 172.40.103.2 verbose Tracing MPLS Label Switched Path to 11.11.11.11/32, timeout is 2 seconds Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. 0 172.40.103.1 172.40.103.2 MRU 1500 [Labels: 16038 Exp: 0] L 1 172.40.103.2 173.101.103.1 MRU 1500 [Labels: 16037 Exp: 0] 6 ms, ret code 8 L 2 173.101.103.1 11.101.11.11 MRU 1500 [Labels: implicit-null Exp: 0] 4 ms, ret code 8 ! 3 11.101.11.11 6 ms, ret code 3traceroute mpls multipath
To discover all possible paths of an LSP between the ingress and egress routers, use the traceroute mpls multipath command in EXEC mode.
traceroute mpls multipath ipv4 address/mask [ destination start-address end-address address-increment ] [ exp exp-bits ] [flags fec] [force-explicit-null] [ hashkey ipv4 bitmap bit-size ] [ interval min-send-delay ] [ output interface type interface-path-id [ nexthop nexthop-address ] ] [ reply { dscp dscp-value | reply mode { ipv4 | router-alert } } ] [ retry-count count ] [ revision version ] [ source source-address ] [ timeout timeout ] [ ttl value ] [verbose] [ fec-type { bgp | generic | ldp } ]
Syntax Description
ipv4
Specifies the destination type as a Label Distribution Protocol (LDP) IPv4 address.
address/mask
Address prefix of the target and number of bits in the target address network mask.
destination start-address end-address address -increment
- start-address
Start of the network address.
- end-address
End of the network address.
- address-increment
Incremental value of the network address.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
flags fec
(Optional) Specifies that forwarding equivalent class (FEC) stack checking is to be performed at transit routers.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
hashkey ipv4 bitmap bit-size
(Optional) Allows user control of the hash key/multipath settings. Range is 0 to 256. The default is 32.
interval min-send-delay
(Optional) Specifies a send interval, in milliseconds, between requests. Range is 0 to 3600000. Default is 0.
output interface
(Optional) Specifies the output interface where echo request packets are sent.
type
Interface type. For more information, use the question mark (?) online help function.
interface-path-id
Note Use the show interfaces command to see a list of all interfaces currently configured on the router.
For more information, use the question mark (?) online help function.
nexthop
(Optional) Specifies the IP address for the next hop.
nexthop-address
(Optional) IP address for the next hop.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply mode [ ipv4 | router-alert]
- ipv4
Reply with IPv4 UDP packet (this is the default)
- router-alert
Reply with IPv4 UDP packet with router alert
retry-count count
(Optional) Specifies the number of retry attempts during multipath LSP traceroute. A retry is attempted if an outstanding echo request
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
source source-address
(Optional) Specifies the source address used in the echo request packet.
timeout timeout
(Optional) Specifies the timeout interval, in seconds. Range is from 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the maximum number of hops (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command Default
exp exp-bits : 0
hashkey ipv4 bitmap bit-size: 4
interval min-send-delay: 0
reply mode: IPv4
retry-count: 3
timeout timeout : 2
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
The hashkey ipv4 bitmap keyword and bit-size value control how many addresses are encoded in the DSMAP multipath field. Larger values allow more coverage of equal cost multiple paths throughout the network, but with more processing at the head, mid, and tail routers.
Task ID
Examples
The following example shows how to specify the destination type as an LDP IPv4 prefix:
RP/0/RP0/CPU0:router# traceroute mpls multi ipv4 140.140.140.140/32 verbose force-explicit-null Starting LSP Path Discovery for 140.140.140.140/32 Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. LL! Path 0 found, output interface POS0/2/0/3 source 196.100.1.61 destination 127.0.0.1 0 196.100.1.61 196.100.1.62 MRU 4470 [Labels: 18/explicit-null Exp: 0/0] multipaths 0 L 1 196.100.1.62 196.100.1.10 MRU 4470 [Labels: 17/explicit-null Exp: 0/0] ret code 8 multipaths 1 L 2 196.100.1.10 196.100.1.18 MRU 4470 [Labels: implicit-null/explicit-null Exp: 0/0] ret code 8 multipaths 1 ! 3 196.100.1.1018, ret code 3 multipaths 0 LL! Path 1 found, output interface GigabitEthernet0/3/0/0 source 196.100.1.5 destination 127.0.0.1 0 196.100.1.5 196.100.1.37 6 MRU 1500 [Labels: 18/explicit-null Exp: 0/0] multipaths 0 L 1 196.100.1.6 196.100.1.10 MRU 4470 [Labels: 17/explicit-null Exp: 0/0] ret code 8 multipaths 1 L 2 10196.0100.21.5 1010 196.0100.21.10 18 MRU 4470 [Labels: implicit-null/explicit-null Exp: 0/0] ret code 8 multipaths 1 ! 3 10196.0100.21.1018, ret code 3 multipaths 0 Paths (found/broken/unexplored) (2/0/0) Echo Request (sent/fail) (6/0) Echo Reply (received/timeout) (6/0) Total Time Elapsed 80 msThe following example shows how to specify the FEC type as LDP with verbose option:
RP/0/RP0/CPU0:router# traceroute mpls multipath ipv4 11.11.11.11/32 fec-type ldp output interface gigabitEthernet 0/0/0/3 nexthop 172.40.103.2 verbose Starting LSP Path Discovery for 11.11.11.11/32 Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. LL! Path 0 found, output interface GigabitEthernet0/0/0/3 nexthop 172.40.103.2 source 172.40.103.1 destination 127.0.0.0 0 172.40.103.1 172.40.103.2 MRU 1500 [Labels: 16038 Exp: 0] multipaths 0 L 1 172.40.103.2 173.101.103.1 MRU 1500 [Labels: 16037 Exp: 0] ret code 8 multipaths 1 L 2 173.101.103.1 11.101.11.11 MRU 1500 [Labels: implicit-null Exp: 0] ret code 8 multipaths 1 ! 3 11.101.11.11, ret code 3 multipaths 0 Paths (found/broken/unexplored) (1/0/0) Echo Request (sent/fail) (3/0) Echo Reply (received/timeout) (3/0) Total Time Elapsed 21 mstraceroute mpls traffic-eng
To specify the destination type as an MPLS traffic engineering (TE) tunnel, use the traceroute mpls traffic-eng command in EXEC mode.
traceroute mpls traffic-eng tunnel tunnel-ID [ destination start-address end-address address-increment increment-mask ] [ exp exp-bits ] [flags fec] [force-explicit-null] [ reply { dscp dscp-value | reply mode { ipv4 | router-alert } } ] [ revision version ] [ source source-address ] [ timeout timeout ] [ ttl value ] [verbose]
Syntax Description
tunnel Specifies the MPLS-TE tunnel type.
tunnel-ID Tunnel interface.
destination start-address end-address address -increment increment-mask
- start-address
Start of the network address.
- end-address
End of the network address.
- address-increment
Incremental value of the network address.
- increment-mask
Incremental mask of the network address.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
flags fec
(Optional) Specifies that forwarding equivalent class (FEC) stack checking is to be performed at transit routers.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply mode [ ipv4 | router-alert]
- ipv4
Reply with IPv4 UDP packet (this is the default)
- router-alert
Reply with IPv4 UDP packet with router alert
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
source source-address
(Optional) Specifies the source address used in the echo request packet.
timeout timeout
(Optional) Specifies the timeout interval, in seconds. Range is from 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the maximum number of hops (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command History
Release Modification Release 4.0.0 This command was replaced by the traceroute mpls traffic-eng tunnel-te (P2P) command.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
Examples
The following example shows how to specify the destination as a MPLS-TE tunnel:
RP/0/RP0/CPU0:router# traceroute mpls traffic-eng tunnel 13 Tracing MPLS TE Label Switched Path on tunnel-te13, timeout is 2 seconds Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. 0 0.0.0.0 11.0.0.1 MRU 1500 [Labels: 16003 Exp: 0] L 1 192.168.200.2 192.168.170.1 MRU 1500 [Labels: implicit-null Exp: 0] 110 ms ! 2 192.168.170.1 0.0.0.0 MRU 0 [No Label] 169 mstraceroute mpls traffic-eng tunnel-te (P2P)
To specify the destination type as an MPLS traffic engineering (TE) tunnel for a point-to-point connection, use the traceroute mpls traffic-eng tunnel-te (P2P) command in EXEC mode.
traceroute mpls traffic-eng tunnel-te tunnel-ID [ destination start-address end-address address-increment increment-mask ] [ exp exp-bits ] [flags fec] [force-explicit-null] [ reply { dscp dscp-value | mode { ipv4 | router-alert } } ] [ revision version ] [ source source-address ] [ timeout timeout ] [ ttl value ] [verbose]
Syntax Description
tunnel-te Specifies the MPLS-TE tunnel type.
tunnel-ID Tunnel interface.
destination start-address end-address address -increment increment-mask
- start-address
Start of the network address.
- end-address
End of the network address.
- address-increment
Incremental value of the network address.
- increment-mask
Incremental mask of the network address.
exp exp-bits
(Optional) Specifies the MPLS experimental field value in the MPLS header for echo replies. Range is 0 to 7. Default is 0.
flags fec
(Optional) Specifies that forwarding equivalent class (FEC) stack checking is to be performed at transit routers.
force-explicit-null
(Optional) Forces an unsolicited explicit null label to be added to the MPLS label stack and allows LSP ping to be used to detect LSP breakages at the penultimate hop.
reply dscp dscp-value
(Optional) Specifies the differentiated service codepoint value for an MPLS echo reply.
reply-mode [ ipv4 | router-alert]
- ipv4
Reply with IPv4 UDP packet (this is the default)
- router-alert
Reply with IPv4 UDP packet with router alert
revision version
(Optional) Specifies the Cisco extension TLV versioning field:
source source-address
(Optional) Specifies the source address used in the echo request packet.
timeout timeout
(Optional) Specifies the timeout interval, in seconds. Range is from 0 to 3600. Default is 2.
ttl value
(Optional) Specifies the maximum number of hops (range is 1 to 255).
verbose
(Optional) Enables verbose output information, including MPLS echo reply, sender address of the packet, and return codes.
Command History
Release Modification Release 4.0.0 This command was introduced. This command replaces the traceroute mpls traffic-eng command.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
Task ID
Examples
The following example shows how to specify the destination as a MPLS-TE tunnel:
RP/0/RP0/CPU0:router# traceroute mpls traffic-eng tunnel-te 13 Tracing MPLS TE Label Switched Path on tunnel-te13, timeout is 2 seconds Codes: '!' - success, 'Q' - request not sent, '.' - timeout, 'L' - labeled output interface, 'B' - unlabeled output interface, 'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch, 'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label, 'P' - no rx intf label prot, 'p' - premature termination of LSP, 'R' - transit router, 'I' - unknown upstream index, 'X' - unknown return code, 'x' - return code 0 Type escape sequence to abort. 0 0.0.0.0 11.0.0.1 MRU 1500 [Labels: 16003 Exp: 0] L 1 192.168.200.2 192.168.170.1 MRU 1500 [Labels: implicit-null Exp: 0] 110 ms ! 2 192.168.170.1 0.0.0.0 MRU 0 [No Label] 169 ms
