The frr command enables the IS-IS Auto FRR function and displays the IS-IS Auto FRR view.
The undo frr command disables the IS-IS Auto FRR function.
By default, the IS-IS Auto FRR function is disabled.
Product |
Support |
|---|---|
S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S |
Supported |
S2720-EI, S5720I-SI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI |
Not supported |
With the development of networks, the Voice over IP (VoIP) and on-line video services require high-quality real-time transmission. Nevertheless, if an IS-IS fault occurs, multiple processes, including fault detection, LSP update, LSP flooding, route calculation, and FIB entry delivery, must be performed to switch traffic to a new link. This results in a lengthy traffic interruption, which cannot meet the requirement for real-time services.
IS-IS Auto FRR can fast switch traffic to a backup link, ensuring millisecond-level traffic interruption. This protects traffic and improves IS-IS network reliability.
PrecautionsAfter running this command, run the loop-free-alternate command to calculate a loop-free backup route.