Cisco Cisco IOS Software Release 12.2(33)SRE
MPLS Traffic Engineering—RSVP Hello State Timer
Configuration Examples for MPLS Traffic Engineering—RSVP Hello State Timer
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Multiple Cisco IOS Releases
Hello Instance
•
On a fast-reroutable TE LSP with no backup tunnel, create a hello instance with the neighbor
downstream (next hop (NHOP)).
downstream (next hop (NHOP)).
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On a non-fast-reroutable TE LSP, create a hello instance with the neighbor downstream (NHOP) and
the neighbor upstream (previous hop (PHOP)). This is in addition to the existing hellos for Fast
Reroute.
the neighbor upstream (previous hop (PHOP)). This is in addition to the existing hellos for Fast
Reroute.
Note
If both Fast Reroute and hellos for state timeout hello instances are needed on the same link, only one
hello instance is created. It will have the Fast Reroute configuration including interval, missed refreshes,
and DSCP. When a neighbor is down, Fast Reroute and the hello state timer take action.
hello instance is created. It will have the Fast Reroute configuration including interval, missed refreshes,
and DSCP. When a neighbor is down, Fast Reroute and the hello state timer take action.
Configuration Examples for MPLS Traffic Engineering—RSVP
Hello State Timer
Hello State Timer
This section provides a configuration example for the MPLS TE—RSVP Hello State Timer feature:
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MPLS Traffic Engineering—RSVP Hello State Timer: Example
In the following example, the hello state timer is enabled globally and on an interface; and related
parameters, including a DSCP value, a refresh interval, and a missed refresh limit are set on an interface.
parameters, including a DSCP value, a refresh interval, and a missed refresh limit are set on an interface.
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# ip rsvp signalling hello
Router(config)# interface Ethernet 0/0
Router(config-if)# ip rsvp signalling hello
Router(config-if)# ip rsvp signalling hello reroute dscp 30
Router(config-if)# ip rsvp signalling hello reroute refresh interval 5000
Router(config-if)# ip rsvp signalling hello reroute refresh misses 5
Router(config-if)# end
The following example verifies the status of the hello state timer (reroute):
Router# show ip rsvp hello
Hello:
Fast-Reroute/Reroute:Enabled
Statistics:Enabled
Graceful Restart:Enabled (help-neighbor only)