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show track
To display information about objects that are tracked by the tracking process, use the show track command in privileged EXEC mode.
Syntax Description
object-number
(Optional) Object number that represents the object to be tracked. The range is from 1 to 1000.
brief
(Optional) Displays a single line of information related to the preceding argument or keyword.
interface
(Optional) Displays tracked interface objects.
resolution
(Optional) Displays resolution of tracked parameters.
timers
(Optional) Displays polling interval timers.
Command History
Release
Modification
12.2(15)T
This command was introduced.
12.3(8)T
The output was enhanced to include the track-list objects.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.4(2)T
The output was enhanced to display stub objects.
12.2(28)SB
This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.4(9)T
This command was enhanced to display information about the status of an interface when carrier-delay detection has been enabled.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
Cisco IOS XE Release 2.1
This command was integrated into Cisco IOS XE Release 2.1.
12.4(20)T
The output was enhanced to display IP SLAs information.
15.1(3)T
This command was modified. The valid range of the object-number argument increased to 1000.
15.1(1)S
This command was modified. The valid range for the object-number argument increased to 1000.
12.2(50)SY
This command was modified. The valid range for the object-number argument increased to 1000.
15.3(3)S
This command was modified. The output was enhanced to display IPv6 route information.
XE 3.10S
This command was modified. The output was enhanced to display IPv6 route information.
Cisco IOS XE 3.3SE
This command was implemented in Cisco IOS XE Release 3.3SE.
Usage Guidelines
Use this command to display information about objects that are tracked by the tracking process. When no arguments or keywords are specified, information for all objects is displayed.
As of Cisco IOS Release 15.1(3)T, 15.1(1)S, and 12.2(50)SY, a maximum of 1000 objects can be tracked. Although 1000 tracked objects can be configured, each tracked object uses CPU resources. The amount of available CPU resources on a device is dependent upon variables such as traffic load and how other protocols are configured and run. The ability to use 1000 tracked objects is dependent upon the available CPU. Testing should be conducted on site to ensure that the service works under the specific site traffic conditions.
Examples
The following example shows information about the state of IP routing on the interface that is being tracked:
Device# show track 1 Track 1 Interface Ethernet0/2 ip routing IP routing is Down (no IP addr) 1 change, last change 00:01:08 Tracked by: HSRP Ethernet0/3 1The following example shows information about the line-protocol state on the interface that is being tracked:
Device# show track 1 Track 1 Interface Ethernet0/1 line-protocol Line protocol is Up 1 change, last change 00:00:05 Tracked by: HSRP Ethernet0/3 1The following example shows information about the reachability of a route that is being tracked:
Device# show track 1 Track 1 IP route 10.16.0.0 255.255.0.0 reachability Reachability is Up (RIP) 1 change, last change 00:02:04 First-hop interface is Ethernet0/1 Tracked by: HSRP Ethernet0/3 1The following example shows information about the threshold metric of a route that is being tracked:
Device# show track 1 Track 1 IP route 10.16.0.0 255.255.0.0 metric threshold Metric threshold is Up (RIP/6/102) 1 change, last change 00:00:08 Metric threshold down 255 up 254 First-hop interface is Ethernet0/1 Tracked by: HSRP Ethernet0/3 1The following example shows the object type, the interval in which it is polled, and the time until the next poll:
Device# show track timer Object type Poll Interval Time to next poll interface 1 0.844 ip route 15 expired ip sla 5 expired ipv6 route 15 expired application 5 2.944 list 0.500 0.88 stub 1 expiredThe following example shows the state of the IP SLAs tracking:
Device# show track 50 Track 50 IP SLA 400 state State is Up 1 change, last change 00:00:23 Delay up 60 secs, down 30 secs Latest operation return code: UnknownThe following example shows whether a route is reachable:
Device# show track 3 Track 3 IP SLA 1 reachability Reachability is Up 1 change, last change 00:00:47 Latest operation return code: over threshold Latest RTT (millisecs) 4 Tracked by: HSRP Ethernet0/1 3The table below describes the significant fields shown in the displays.
Table 1 show track Field Descriptions Field
Description
Track
Object number that is being tracked.
Interface Ethernet0/2 ip routing
Interface type, interface number, and object that is being tracked.
IP routing is
State value of the object, displayed as Up or Down. If the object is down, the reason is displayed.
1 change, last change
Number of times that the state of a tracked object has changed and the time (in hh:mm:ss ) since the last change.
Tracked by
Client process that is tracking the object.
First-hop interface is
Displays the first-hop interface.
Object type
Object type that is being tracked.
Poll Interval
Interval (in seconds) in which the tracking process polls the object.
Time to next poll
Period of time, in seconds, until the next polling of the object.
The following output shows that there are two objects. Object 1 has been configured with a weight of 10 “down,” and object 2 has been configured with a weight of 20 “up.” Object 1 is down (expressed as 0/10) and object 2 is up. The total weight of the tracked list is 20 with a maximum of 30 (expressed as 20/30). The “up” threshold is 20, so the list is “up.”
Device# show track Track 6 List threshold weight Threshold weight is Up (20/30) 1 change, last change 00:00:08 object 1 Down (0/10) object 2 weight 20 Up (20/30) Threshold weight down 10 up 20 Tracked by: HSRP Ethernet0/3 1The following example shows information about the Boolean configuration:
Device# show track Track 3 List boolean and Boolean AND is Down 1 change, last change 00:00:08 object 1 not Up object 2 Down Tracked by: HSRP Ethernet0/3 1The table below describes the significant fields shown in the displays.
Table 2 show track Field Descriptions Field
Description
Track
Object number that is being tracked.
Boolean AND is Down
Each object defined in the list must be in a down state.
1 change, last change
Number of times that the state of a tracked object has changed and the time (in hh:mm:ss ) since the last change.
Tracked by
Client process that is tracking the object; in this case, HSRP.
The following example shows information about a stub object that has been created to be tracked using Embedded Event Manager (EEM):
Device# show track Track 1 Stub-object State is Up 1 change, last change 00:00:04, by UndefinedThe following example shows information about a stub object when the brief keyword is used:
Device# show track brief Track Object Parameter Value Last Change 1 Stub-object Undefined Up 00:00:12The following example shows information about the line-protocol state on an interface that is being tracked and which has carrier-delay detection enabled:
Device# show track Track 101 Interface Ethernet1/0 line-protocol Line protocol is Down (carrier-delay) 1 change, last change 00:00:03The table below describes the significant fields shown in the displays.
Table 3 show track brief Field Descriptions Field
Description
Track
Object number that is being tracked.
Interface Ethernet1/0 line-protocol
Interface type, interface number, and object that is being tracked.
Line protocol is Down (carrier-delay)
State of the interface with the carrier-delay parameter taken into consideration.
last change
Time (in hh:mm:ss ) since the state of a tracked object last changed.
The table below describes the significant fields shown in the displays.
Table 4 show track brief Field Descriptions Field
Description
Track
Object number that is being tracked.
Object
Definition of stub object.
Parameter
Tracking parameters.
Value
State value of the object, displayed as Up or Down.
last change
Time (in hh:mm:ss ) since the state of a tracked object last changed.
The following example shows sample output with respect to IPv6 routing:Router# show track Track 107 Interface Ethernet0/0 ipv6 routing IPv6 routing is Down (ipv6 interface disabled) 1 change, last change 00:03:53 Delay up 70 secs Track 108 Interface Ethernet0/0 ipv6 routing IPv6 routing is Down (ipv6 interface disabled) 1 change, last change 00:03:53 Delay up 10 secs, down 30 secs Track 111 Interface Ethernet0/1 line-protocol Line protocol is Up 1 change, last change 00:14:17 Track 601 IPv6 route 2001:DB8::EEEE/64 metric threshold Metric threshold is Down (no ipv6 route) 1 change, last change 00:10:21 Metric threshold down 255 up 254 First-hop interface is unknown Track 607 IPv6 route 2001:DB8::FFFF/64 metric threshold Metric threshold is Down (no ipv6 route) 1 change, last change 00:10:21 Metric threshold down 255 up 254 First-hop interface is unknown Track 608 IPv6 route 2001:DB8::FFFF:AD45/64 metric threshold Metric threshold is Down (no ipv6 route) 1 change, last change 00:10:21 Metric threshold down 140 up 120 First-hop interface is unknown Track 612 IPv6 route 2001:DB8:0000::FFFF/64 reachability Reachability is Down (no ipv6 route) 1 change, last change 00:10:14 Delay up 30 secs, down 20 secs First-hop interface is unknownThe following example shows sample output with respect to IPv6 routing in brief format:Router# show track Track Object Parameter Value Last Change 1 application home-agent Up 00:14:25 101 interface Ethernet0/0 ip routing Up 00:14:25 107 interface Ethernet0/0 ipv6 routing Down 00:04:01 108 interface Ethernet0/0 ipv6 routing Down 00:04:01 111 interface Ethernet0/1 line-protocol Up 00:14:25 201 ip route 11.0.0.1/8 metric threshold Down 00:14:25 211 ip route 21.0.0.1/8 reachability Down 00:14:25 301 ip sla 1 reachability Down 00:14:25 302 ip sla 1 reachability Down 00:14:25 311 ip sla 1 state Down 00:14:25 312 ip sla 1 state Down 00:14:25 403 list boolean Down 00:14:25 413 list boolean Down 00:14:25 501 Stub-object Undefined Up 00:11:01 502 Stub-object Undefined Down 00:11:01 503 Stub-object Undefined Down 00:11:01 601 ipv6 route 2001:DB8::EEEE/64 metric threshold Down 00:10:29 607 ipv6 route 2001:DB8::FFFF/64 metric threshold Down 00:10:29 608 ipv6 route 2001:DB8::FFFF:AD45/64 metric threshold Down 00:10:29 612 ipv6 route 2001:DB8:0000::FFFF/64 reachability Down 00:10:22Related Commands
Command
Description
showtrack resolution
Displays the resolution of tracked parameters.
track interface
Configures an interface to be tracked and enters tracking configuration mode.
track interface
Configures an interface to be tracked and enters tracking configuration mode.
track ip route
Tracks the state of an IP route and enters tracking configuration mode.