Cisco NCS 6000 Series User Manual

PurposeCommand or Action
RP/0/RP0/CPU0:router(config)# router isis isp
• You can change the level of routing to be performed
by a particular routing instance by using the is-type
router configuration command.
Specifies the IPv4or IPv6 address family, and enters router
address family configuration mode.
address-family { ipv4 | ipv6 } [ unicast ]
Example:
Step 3
RP/0/RP0/CPU0:router(config-isis)#address-family
ipv4 unicast
(Optional) Controls the minimum time between successive
SPF calculations.
spf-interval {[ initial-wait initial | secondary-wait
secondary | maximum-wait maximum ] ...} [ level { 1
| 2 }]
Step 4
• This value imposes a delay in the SPF computation
after an event trigger and enforces a minimum elapsed
time between SPF runs.
Example:
RP/0/RP0/CPU0:router(config-isis-af)# spf-interval
initial-wait 10 maximum-wait 30
• If this value is configured too low, the router can lose
too many CPU resources when the network is unstable.
• Configuring the value too high delays changes in the
network topology that result in lost packets.
• The SPF interval does not apply to the running of the
ISPF because that algorithm runs immediately on
receiving a changed LSP.
(Optional) Configures incremental IS-IS ISPF to calculate
network topology.
ispf [ level { 1 | 2 }]
Example:
Step 5
RP/0/RP0/CPU0:router(config-isis-af)# ispf
commit
Step 6
(Optional) Displays how often and why the router has run
a full SPF calculation.
show isis [ instance instance-id ] [[ ipv4 | ipv6 | afi-all
] [ unicast | safi-all ]] spf-log [ level { 1 | 2 }] [ ispf |
fspf | prc | nhc ] [ detail | verbose ] [ last number |
first number ]
Step 7
Example:
RP/0/RP0/CPU0:router# show isis instance 1 spf-log
ipv4
Customizing Routes for IS-IS
This task explains how to perform route functions that include injecting default routes into your IS-IS routing
domain and redistributing routes learned in another IS-IS instance. This task is optional.
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
231
Implementing IS-IS
Customizing Routes for IS-IS

Cisco NCS 6000 Series Specifications

General

Brand	Cisco
Model	NCS 6000 Series
Category	Network Router
Language	English