Default Link-State Tracking Configuration; Link-State Tracking Configuration Guidelines; Configuring Link-State Tracking - Cisco Catalyst 3750-X Software Configuration Manual

Configuring Link-State Tracking

Default Link-State Tracking Configuration

There are no link-state groups defined, and link-state tracking is not enabled for any group.

Link-State Tracking Configuration Guidelines

•
•
•
•
Configuring Link-State Tracking
Beginning in privileged EXEC mode, follow these steps to configure a link-state group and to assign an
interface to a group:
Command
Step 1
configure terminal
Step 2
link state track number
Step 3 interface interface-id
link state group [number] {upstream |
Step 4
downstream}
Step 5
end
Step 6
show running-config
Step 7 copy running-config startup-config
This example shows how to create a link-state group and to configure the interfaces:
Switch# configure terminal
Switch(config)# link state track 1
Switch(config)# interface range gigabitethernet1/0/21 -22
Switch(config-if)# link state group 1 upstream
Switch(config-if)# interface gigabitethernet1/0/1
Switch(config-if)# link state group 1 downstream
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
40-26
An interface that is defined as an upstream interface cannot also be defined as a downstream
interface in the same or a different link-state group. The reverse is also true.
An interface cannot be a member of more than one link-state group.
You can configure only two link-state groups per Catalyst 3560-X switch.
You can configure only ten link-state groups per Catalyst 3750-X switch.
Chapter 40 Configuring EtherChannels and Link-State Tracking
Purpose
Enter global configuration mode.
Create a link-state group, and enable link-state tracking. For
Catalyst 3560-X switches, the group number can be 1 to 2. For
Catalyst 3750-X switches, the group number can be 1 to 10. The
default is 1.
Specify a physical interface or range of interfaces to configure,
and enter interface configuration mode.
Valid interfaces include switch ports in access or trunk mode
(IEEE 802.1q), routed ports, or multiple ports bundled into an
EtherChannel interface (static or LACP) that is also in trunk
mode.
Specify a link-state group, and configure the interface as either
an upstream or downstream interface in the group.For Catalyst
3560-X switches, the group number can be 1 to 2. For Catalyst
3750-X switches, the group number can be 1 to 10. The default
is 1.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
OL-21521-01