command ties the weighting of the GLBP gateway to the availability of its interfaces. This command is useful for tracking interfaces that are not configured for GLBP; for instance, you can track the interface that connects the gateway to the IP network.
When a tracked interface goes down, the GLBP gateway weighting decreases by the configured decrement value. For each GLBP group, you can track a separate list of interfaces.
When the tracked interface comes back up, GLBP increments the weighting by the same amount.
When multiple tracked interfaces are down, the configured weighting decrements are cumulative.
command to configure each interface that you want to track.
This command does not require a license.
This example shows that Ethernet interface 1/1 tracks two interfaces represented by the numbers 1 and 2. If interface 1 goes down, the GLBP gateway weighting decreases by the default value of 10. If interface 2 goes down, the GLBP gateway weighting decreases by 5.
switch(config)# interface fastethernet 0/0 switch(config-if)# glbp 10 switch(config-glbp)# weighting track 1 switch(config-glbp)# weighting track 2 decrement 5