Specifications

ip rsvp signalling hello dscp
MP-110
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
ip rsvp signalling hello dscp
To set the differentiated services code point (DSCP) value that is in the IP header of a Resource
Reservation Protocol (RSVP) traffic engineering (TE) hello message sent from an interface, use the ip
rsvp signalling hello dscp command in interface configuration mode. To set the DSCP value to its
default, use the no form of this command.
ip rsvp signalling hello [fas
t-reroute] dscp num
no ip rsvp signalling hello [fast
-reroute] dscp
Syntax Description
Command Default The default DSCP value is 48.
Command Modes Interface configuration
Command History
Usage Guidelines If a link is congested, it is recommended that you set the DSCP to a value higher than 0 to reduce the
l
ikelihood that hello messages will be dropped.
You configure the DSCP per interface, not per flow.
The DSCP applies to the RSVP hellos created on a specific interface. You can configure each interface
i
ndependently for DSCP.
If you issue the ip r
svp signalling hello dscp command without the optional fast-reroute keyword, the
command applies to Fast Reroute hellos. This command is provided for backward compatibility;
however, we recommend that you use the ip rsvp signalling hello fast-reroute dscp command.
Examples In the following example, hello messages sent from this interface have a DSCP value of 30 and Fast
Rer
oute capability is enabled by specifying the fast-reroute keyword:
Router(config-if)# ip rsvp signalling hello fast-reroute dscp 30
fast-reroute (Optional) Initiates Fast Reroute capability.
num DSCP value. Valid values are from 0 to 63.
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.