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Advanced Configuration and Management Guide
If a change in state (up or down) is detected by the track port, the priority of the SRP Group Interface will
automatically be increased or decreased.
NOTE: Virtual router interfaces cannot be assigned as track ports.
Multiple Track Port Support
You can assign multiple ports to serve as track ports for SRP redundant links. If an active link fails, all SRP
interfaces that serve as track ports for the failed link are placed in standby mode.
This feature allows you to configure a system so that a given routing switch and its defined redundant links will be
in either active or standby mode. Multiple track port assignment prevents a mix of active and standby links to exist
on a routing switch.
For example, in Figure 13.3, links on Router 1 designated as e1 and e3 have failed and have transferred control to
their standby links on Router 2; e4 and e2 remain as active links. This results in Router 1, the routing switch that
was originally assigned to serve as the active router, having a mix of active and standby links.
To bias all traffic and link traffic to the standby router, assign all other redundant links as track ports for all other
interfaces on the routing switch. For example, on Router 1, you would assign interfaces e1, e2, and e3 as track
ports for e4. Interfaces e1, e2, and e4 would thus track port e3. Interfaces e2, e3, and, e4 would track port e1.
Interfaces e1, e3, and e4 would track port e2. Configured in this manner, a failure on Router 1 links e1 and e3
would make Router 2 the active router for all the links seen in Figure 13.4.
Because one routing switch and all its links are active and the other routing switch and its links are all in standby
mode, all traffic will be directed to the active router.
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