RSVP GR configuration example
Network requirements
Switch A, Switch B, and Switch C run IS-IS, and all of them are Layer 2 switches.
Use RSVP-TE to establish a TE tunnel from Switch A to Switch C.
Configure RSVP GR on the switches to ensure continuous forwarding when a switch reboots.
Figure 41: Network diagram
Configuration procedure
Configure IP addresses and masks for interfaces. (Details not shown.)
Configure IS-IS to advertise interface addresses, including the loopback interface address. (Details not shown.)
Configure an LSR ID, enable MPLS, MPLS TE, RSVP, and RSVP hello extension:
# Configure Switch A.
<SwitchA> system-view [SwitchA] mpls lsr-id 1.1.1.9 [SwitchA] mpls te [SwitchA-te] quit [SwitchA] rsvp [SwitchA-rsvp] quit [SwitchA] interface vlan-interface 1 [SwitchA-Vlan-interface1] mpls enable [SwitchA-Vlan-interface1] mpls te enable [SwitchA-Vlan-interface1] rsvp enable [SwitchA-Vlan-interface1] rsvp hello enable [SwitchA-Vlan-interface1] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] mpls lsr-id 2.2.2.9 [SwitchB] mpls te [SwitchB-te] quit [SwitchB] rsvp [SwitchB-rsvp] quit [SwitchB-mpls] interface vlan-interface 1 [SwitchB-Vlan-interface1] mpls enable [SwitchB-Vlan-interface1] mpls te enable [SwitchB-Vlan-interface1] rsvp enable [SwitchB-Vlan-interface1] rsvp hello enable [SwitchB-Vlan-interface1] quit [SwitchB] interface vlan-interface 2 [SwitchB-Vlan-interface2] mpls enable [SwitchB-Vlan-interface2] mpls te enable [SwitchB-Vlan-interface2] rsvp enable [SwitchB-Vlan-interface2] rsvp hello enable [SwitchB-Vlan-interface2] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] mpls lsr-id 3.3.3.9 [SwitchC] mpls te [SwitchC-te] quit [SwitchC] rsvp [SwitchC-rsvp] quit [SwitchC] interface vlan-interface 2 [SwitchC-Vlan-interface2] mpls enable [SwitchC-Vlan-interface2] mpls te enable [SwitchC-Vlan-interface2] rsvp enable [SwitchC-Vlan-interface2] rsvp hello enable [SwitchC-Vlan-interface2] quit
Configure IS-IS TE. (Details not shown.)
Configure an MPLS TE tunnel. (Details not shown.)
Configure RSVP GR:
# Configure Switch A.
[SwitchA] rsvp [SwitchA-rsvp] graceful-restart enable
# Configure Switch B.
[SwitchB] rsvp [SwitchB-rsvp] graceful-restart enable
# Configure Switch C.
[SwitchC] rsvp [SwitchC-rsvp] graceful-restart enable
Verifying the configuration
# After a tunnel is established from Switch A and Switch C, display detailed RSVP neighbor information on Switch A.
<SwitchA> display rsvp peer verbose Peer: 10.1.1.2 Interface: Vlan1 Hello state: Up Hello type: Active P2P PSB count: 0 P2P RSB count: 1 P2MP PSB count: 0 P2MP RSB count: 0 Src instance: 0x1f08 Dst instance: 0x22 Summary refresh: Disabled Graceful Restart state: Ready Peer GR restart time: 120000 ms Peer GR recovery time: 0 ms
The output shows that the neighbor's GR state is Ready.