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Interface and Hardware Component Command Reference, Cisco IOS XE Release 3SE (Catalyst 3850 Switches)
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cable bundle through clock mode
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clock rate through cut-through
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D through E
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F through H
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I through K
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l2 vfi manual through loopback (PA-MC-8TE1 + port adapter)
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loopback (T1 interface) through nrzi-encoding
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O through R
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service-module t1 linecode through show controllers satellite
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show controllers serial through show hw-module slot proc cpu
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show hw-module slot tech-support through show interfaces vg-anylan
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show interfaces vlan mapping through show scp
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show service-module serial through standby port
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squelch through system jumbomtu
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tunnel bandwidth through yellow
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Index
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Feedback
Contents
l2 vfi manual through loopback (PA-MC-8TE1 + port adapter)
- l2protocol-tunnel
- l2protocol-tunnel cos
- lacp port-priority
- lacp system-priority
- link state group
- link state track
l2protocol-tunnel
To enable the protocol tunneling on an interface and specify the type of protocol to be tunneled, use the l2protocol-tunnel command in global or interface configuration mode. To disable protocol tunneling, use the no form of this command.
Global Configuration
l2protocol-tunnel [ cos cos-value | global | mac-address ]
no l2protocol-tunnel
Interface Configuration
l2protocol-tunnel [ cdp | lldp | stp | vtp ]
no l2protocol-tunnel
Syntax Description
cos cos-value
(Optional) Specifies a class of service (CoS) value globally on all ingress Layer 2 protocol tunneling ports.
global
(Optional) Displays global settings.
mac-address
(Optional) Displays L2PT MAC address.
cdp
(Optional) Enables Cisco Discovery Protocol (CDP) tunneling.
lldp
(Optional) Enables Link Layer Discovery Protocol (LLDP) tunneling.
stp
(Optional) Enables Spanning Tree Protocol (STP) tunneling.
vtp
(Optional) Enables VLAN Trunking Protocol (VTP) tunneling.
Command History
Release
Modification
12.2(14)SX
Support for this command was introduced on the Supervisor Engine 720.
12.2(17d)SXB
Support for this command on the Supervisor Engine 2 was extended to Release 12.2(17d)SXB.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
15.2(2)T
This command was modified. The lldp, cos, global, and mac-address keywords were added.
Usage Guidelines
On all the service provider edge switches, you must enable PortFast BPDU filtering on the 802.1Q tunnel ports by entering these commands:
Router(config-if)# spanning-tree bpdufilter enable Router(config-if)# spanning-tree portfast
NotePortFast BPDU filtering is enabled automatically on tunnel ports.
If you do not specify a protocol, all protocols are tunneled.
You can configure protocol tunneling on VLAN and trunk interfaces.
You must enter the switchport command once without any keywords to configure the LAN port as a Layer 2 interface before you can enter additional switchport commands with keywords. This action is required only if you have not entered the switchport command for the interface.
Examples
This example shows how to enable a tunneling protocol on an interface:
Router> enable Router# configure terminal Router#(config)interface FastEthernet 0/0 Router(config-if)# l2protocol-tunnel cdpThis example shows how to disable a tunneling protocol on an interface:
Router> enable Router# configure terminal Router#(config)interface fastEthernet 4/0 Router(config-if)# no l2protocol-tunnel Protocol tunneling disabled on interface fastEthernet 4/1l2protocol-tunnel cos
To specify a class of service (CoS) value globally on all ingress Layer-2 protocol tunneling ports, use the l2protocol-tunnelcoscommand in global configuration mode. To return to the default , use the no form of this command.
Usage Guidelines
The cos-value is the CoS value that you assign to the PDUs on a Layer 2-protocol tunnel port before tunneling the PDUs through the service-provider network.
You can specify a CoS value globally on all ingress Layer 2-protocol tunneling ports. Because the CoS value applies to all ingress tunneling ports, all encapsulated PDUs that are sent out by the Cisco 7600 series router have the same CoS value.
On all the service-provider edge switches, you must enable PortFast BPDU filtering on the 802.1Q tunnel ports by entering these commands:
Router(config-if)# spanning-tree bpdufilter enable Router(config-if)# spanning-tree portfast
NotePortFast BPDU filtering is enabled automatically on tunnel ports.
lacp port-priority
To set the priority for a physical interface, use the lacp port-priority command in interface configuration mode. To return to the default setting, use the no form of this command.
Command History
Release
Modification
12.1(13)EW
This command was introduced on the Cisco Catalyst 4500 series switches.
12.2(14)SX
Support for this command on the Supervisor Engine 720 was integrated into Cisco IOS Release12.2(14)SX.
12.2(17d)SXB
Support for this command on the Supervisor Engine 2 was integrated into Cisco IOS Release12.2(17d) SXB.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SRB
Support for this command on the Cisco 7600 router was integrated into Cisco IOS Release 12.2(33)SRB.
Cisco IOS XE Release 2.4
This command was integrated into Cisco IOS XE Release 2.4.
15.1(2)SNG
This command was implemented on the Cisco ASR 901 Series Aggregation Services Router.
Usage Guidelines
You may assign a port priority to each port on a device running Link Aggregation Control Protocol (LACP). You can specify the port priority by using the lacp port-priority command at the command-line interface (CLI) or use the default port priority (32768) that is carried as part of the LACP protocol data unit (PDU) exchanged with the partner. Port priority is used to decide which ports should be put in standby mode when a hardware limitation or the lacp max-bundle command configuration prevents all compatible ports from aggregating. Priority is supported only on port channels with LACP-enabled physical interfaces.
NoteA high priority number means a low priority.
Port priority together with port number form a port identifier.
To verify the configured port priority, issue the show lacp command.
Examples
This example shows how to set a priority of 23700 for an interface:
Device> enable Device# configure terminal Device(config)# interface ethernet0/0 Device(config-if)# lacp port-priority 23700 Device(config-if)#Related Commands
Command
Description
channel-group
Assigns and configures an EtherChannel interface to an EtherChannel group.
debug lacp
Enables debugging of LACP activities.
lacp max-bundle
Defines the maximum number of active bundled LACP ports allowed in a port channel.
lacp system-priority
Sets the priority of the system.
show lacp
Displays information about LACP activity on the device.
lacp system-priority
To set the priority for a system, use the lacp system-priority command in global configuration mode. To return to the default setting, use the no form of this command.
Command History
Release
Modification
12.1(13)EW
This command was introduced on the Cisco Catalyst 4500 series switches.
12.2(14)SX
Support for this command on the Supervisor Engine 720 was integrated into Cisco IOS Release12.2(14)SX.
12.2(17d)SXB
Support for this command on the Supervisor Engine 2 was integrated into Cisco IOS Release12.2(17d) SXB.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SRB
Support for this command on the Cisco 7600 router was integrated into Cisco IOS Release 12.2(33)SRB.
Cisco IOS XE Release 2.4
This command was integrated into Cisco IOS XE Release 2.4.
15.1(2)SNG
This command was implemented on the Cisco ASR 901 Series Aggregation Services Router.
Usage Guidelines
You can assign a system priority to each device running Link Aggregation Control Protocol (LACP). You can specify the system priority by using the lacp system-priority command at the command-line interface (CLI) or use the default system priority (32768) that is carried as part of the LACP protocol data unit (PDU) exchanged with the partner. System priority is used with the MAC address of the device to form the system ID and also is used during negotiation with other systems. Priority is supported only on port channels with LACP-enabled physical interfaces.
NoteA high priority number means a low priority.
To verify the configured system priority, issue the show lacp command.
link state group
Usage Guidelines
Link State Ttracking (LST), also known as trunk failover, is a feature that binds the link state of multiple interfaces. When you configure LST for the first time, add upstream interfaces to the link state group before adding the downstream interface, otherwise the downstream interfaces would move into error-disable mode. The maximum number of link state groups configurable is 10. These are the limitations:
- An interface can only be an upstream or downstream interface.
- An interface cannot be part of more than one link state tracking group.
Examples
The following example shows how to configure the link state group number.
Router# configure terminal Router(config)# link state track 1 Router(config)# interface gigabitethernet3/1 Router(config-if)# link state group 1 upstream Router(config-if)# interface gigabitethernet3/3 Router(config-if)# link state group 1 upstream Router(config-if)# interface gigabitethernet3/5 Router(config-if)# link state group 1 downstream Router(config-if)# interface gigabitethernet3/7 Router(config-if)# link state group 1 downstreamlink state track
To configure a link state tracking number, use the linkstatetrack command in global configuration mode. To restore the default linkstatetracknumber, use the no form of this command.
Usage Guidelines
Link State Ttracking (LST), also known as trunk failover, is a feature that binds the link state of multiple interfaces. When you configure LST for the first time, add upstream interfaces to the link state group before adding the downstream interface, otherwise the downstream interfaces would move into error-disable mode.
