Cisco NCS 6000 Series

SUMMARY STEPS
1. configure
2. router isis instance-id
3. set-overload-bit [ on-startup { delay | wait-for-bgp }] [ level { 1 | 2 }]
4. address-family { ipv4 | ipv6 } [ unicast ]
5. default-information originate [ route-policy route-policy-name ]
6. redistribute isis instance [ level-1 | level-2 | level-1-2 ] [ metric metric ] [ metric-type { internal
| external }] [ policy policy-name ]
7. Do one of the following:
• summary-prefix address / prefix-length [ level { 1 | 2 }]
• summary-prefix ipv6-prefix / prefix-length [ level { 1 | 2 }]
8. maximum-paths route-number
9. distance weight [ address / prefix-length [ route-list-name ]]
10. attached-bit send { always-set | never-set }
11. commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enables IS-IS routing for the specified routing process,
and places the router in router configuration mode.
router isis instance-id
Example:
Step 2
• By default, all IS-IS instances are automatically
Level 1 and Level 2. You can change the level of
RP/0/RP0/CPU0:router(config)# router isis isp
routing to be performed by a particular routing
instance by using the is-type command.
(Optional) Sets the overload bit.
set-overload-bit [ on-startup { delay | wait-for-bgp
}] [ level { 1 | 2 }]
Step 3
The configured overload bit behavior does not
apply to NSF restarts because the NSF restart
does not set the overload bit during restart.
Note
Example:
RP/0/RP0/CPU0:router(config-isis)#
set-overload-bit
Specifies the IPv4 or IPv6 address family, and enters router
address family configuration mode.
address-family { ipv4 | ipv6 } [ unicast ]
Example:
Step 4
RP/0/RP0/CPU0:router(config-isis)# address-family
ipv4 unicast
(Optional) Injects a default IPv4 or IPv6 route into an IS-IS
routing domain.
default-information originate [ route-policy
route-policy-name ]
Step 5
Example:
• The route-policy keyword and route-policy-name
argument specify the conditions under which the IPv4
or IPv6 default route is advertised.
RP/0/RP0/CPU0:router(config-isis-af)#
default-information originate
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
232
Implementing IS-IS
Customizing Routes for IS-IS