Frr Configuration Example - 3Com S7906E Configuration Manual

S7900e family release 6600 series

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1.1.1.9:2054

Configuring ordinary CR-LSP backup is almost the same as configuring hot CR-LSP backup except that

you need to replace the mpls te backup hot-standby command with the mpls te backup ordinary

command. Unlike in hot CR-LSP backup where a secondary tunnel is created immediately upon

creation of a primary tunnel, in ordinary CR-LSP backup, a secondary CR-LSP is created only after the

primary LSP goes down.

Create a static route for routing MPLS TE tunnel traffic

[SwitchA] ip route-static 20.1.1.2 24 tunnel 3 preference 1

Perform the display ip routing-table command on Switch A. You can find a static route entry with

Tunnel1 as the outgoing interface.

FRR Configuration Example

Network requirements

On a primary LSP Switch A → Switch B → Switch C → Switch D, use FRR to protect the link Switch B →

Switch C and use BFD to detect the status of link Switch B→Switch C.

Do the following:

Create a bypass LSP that traverses the path Switch B → Switch E → Switch C. Switch B is the PLR

and Switch C is the MP.

Explicitly route the primary TE tunnel and the bypass TE tunnel with the signaling protocol being

Figure 1-10 Link protection using the FRR approach

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