Specifications

ip rsvp signalling hello refresh misses
MP-114
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
ip rsvp signalling hello refresh misses
To specify how many Resource Reservation Protocol (RSVP) traffic engineering (TE) hello
acknowledgments a node can miss in a row before the node considers that communication with its
neighbor is down, use the ip rsvp signalling hello refresh misses command in interface configuration
mode. To return the missed refresh limit to its default value, use the no form of this command.
ip rsvp signalling hello [fas
t-reroute] refresh misses msg-count
no ip rsvp signalling hello [fast
-reroute] refresh misses
Syntax Description
Command Default The default n
umber of sequential hello acknowledgments is 4.
Command Modes Interface configuration
Command History
Usage Guidelines A hello comprises a hello message, a Hello Request object, and a Hello ACK object. Each request is
an
swered by an acknowledgment. If a link is very congested or a router has a very heavy load, set this
number to a value higher than the default value to ensure that hello does not falsely declare that a
neighbor is down.
If you issue the ip
rsvp signalling hello refresh misses command without the optional fast-reroute
keyword, the command applies to Fast Reroute hellos and Fast Reroute capability is enabled by default.
This command is provided for backward compatibility; however, we recommend that you use the ip rsvp
signalling hello fast-reroute refresh misses command.
Examples In the following example, if the node does not receive five hello acknowledgments in a row, the node
de
clares that its neighbor is down and Fast Reroute is enabled by specifying the fast-reroute keyword:
Router(config-if)# ip rsvp signalling hello fast-reroute refresh misses 5
fast-reroute (Optional) Initiates Fast Reroute capability.
msg-count Number of sequential hello acknowledgments that a node can miss before
R
SVP considers the state expired and tears it down. Valid values are from 4
to 10.
Release Modification
12.0(22)S This command was introduced.
12.0(29)S The optional fa
st-reroute keyword was added.
12.2(18)SXD1 This command was integrated into Cisco IOS Release 12.2(18)SXD1.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2 This command was integrated into Cisco IOS Release 12.2(31)SB2.