Implementing IS-IS on Cisco IOS XR Software
How to Implement IS-IS on Cisco IOS XR Software
RC-114
Cisco IOS XR Routing Configuration Guide
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Enters global configuration mode.
Step 2
router isis
instance-id
Example:
RP/0/RP0/CPU0:router(config)# router isis isp
Enables IS-IS routing for the specified routing instance,
and places the router in router configuration mode.
• You can change the level of routing to be performed
by a particular routing instance using the is-type
command.
Step 3
log adjacency changes
Example:
RP/0/RP0/CPU0:router(config-isis)# log adjacency
changes
Generates a log message when an IS-IS adjacency
changes state (up or down).
Step 4
interface
type number
Example:
RP/0/RP0/CPU0:router(config-isis)# interface POS
0/1/0/3
Enters interface configuration mode.
Step 5
hello-padding {disable | sometimes} [level {1 |
2}]
Example:
RP/0/RP0/CPU0:router(config-isis-if)# hello-paddi
ng sometimes
Configures padding on IS-IS hello PDUs for all IS-IS
interfaces on the router.
• Hello padding applies to only this interface and not
to all interfaces.
Step 6
hello-interval
seconds
[level {1 | 2}]
Example:
RP/0/RP0/CPU0:router(config-isis-if)#
hello-interval 6
Specifies the length of time between hello packets that
the software sends.
Step 7
hello-multiplier
multiplier
[level {1 | 2}]
Example:
RP/0/RP0/CPU0:router(config-isis-if)#
hello-multiplier 10
Specifies the number of IS-IS hello packets a neighbor
must miss before the router should declare the adjacency
as down.
• A higher value increases the networks tolerance for
dropped packets, but also may increase the amount
of time required to detect the failure of an adjacent
router.
• Conversely, not detecting the failure of an adjacent
router can result in greater packet loss.
