R3102-R3103-HP 6600/HSR6600 Routers MPLS Configuration Guide

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Hop 1 10.1.1.2
Hop 2 2.2.2.9
Hop 3 20.1.1.1
Hop 4 20.1.1.2
Hop 5 3.3.3.9
Tunnel Interface Name : Tunnel3
Lsp ID : 1.1.1.9 :2054
Hop Information
Hop 0 30.1.1.1
Hop 1 30.1.1.2
Hop 2 4.4.4.9
Hop 3 40.1.1.1
Hop 4 40.1.1.2
Hop 5 3.3.3.9
# Execute the tracert command to draw the picture of the path that a packet must travel to reach
the tunnel destination.
[RouterA] tracert –a 1.1.1.9 3.3.3.9
traceroute to 3.3.3.9(3.3.3.9) 30 hops max,40 bytes packet
1 10.1.1.2 25 ms 30.1.1.2 25 ms 10.1.1.2 25 ms
2 40.1.1.2 45 ms 20.1.1.2 29 ms 40.1.1.2 54 ms
The output shows that the current LSP traverses Route B but not Router D.
# Shut down interface GigabitEthernet 2/1/2 on Router B. Execute the tracert command on Router
A to draw the path to the tunnel destination. The output shows that the LSP is re-routed to traverse
Router D:
[RouterA] tracert –a 1.1.1.9 3.3.3.9
traceroute to 3.3.3.9(3.3.3.9) 30 hops max,40 bytes packet
1 30.1.1.2 28 ms 27 ms 23 ms
2 40.1.1.2 50 ms 50 ms 49 ms
# Execute the display mpls te tunnel command on Router A. You can see that only the tunnel
traversing Router D is present:
[RouterA] display mpls te tunnel
LSP-Id Destination In/Out-If Name
1.1.1.9:2054 3.3.3.9 -/POS5/1/1 Tunnel3
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.
6. Create a static route to direct traffic to the MPLS TE tunnel:
[RouterA] ip route-static 20.1.1.2 24 tunnel 3 preference 1
Execute the display ip routing-table command on Router A. You can see a static route entry with
Tunnel 3 as the outgoing interface.
FRR configuration example
Network requirements
On the LSP Router A Router B Router C Router D, use FRR→→ → to protect the link Router B Router C.→