Cisco NCS 5500 Series

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7. 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 ]

DETAILED STEPS

Step 1 configure

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 by using the is-type router

configuration command.

Step 3 address-family { ipv4 | ipv6 } [ unicast ]

Example:

RP/0/RP0/CPU0:router(config-isis)#address-family ipv4 unicast

Specifies the IPv4or IPv6 address family, and enters router address family configuration mode.

Step 4 spf-interval {[ initial-wait initial | secondary-wait secondary | maximum-wait maximum ] ...} [ level { 1 | 2

}]

Example:

RP/0/RP0/CPU0:router(config-isis-af)# spf-interval initial-wait 10 maximum-wait 30

(Optional) Controls the minimum time between successive SPF calculations.

• This value imposes a delay in the SPF computation after an event trigger and enforces a minimum elapsed time

between SPF runs.

• 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.

Step 5 ispf [ level { 1 | 2 }]

Example:

RP/0/RP0/CPU0:router(config-isis-af)# ispf

(Optional) Configures incremental IS-IS ISPF to calculate network topology.

Step 6 commit

Step 7 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 ]

Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x

Implementing IS-IS

Set SPF Interval for a Single-Topology Configuration

Other manuals for Cisco NCS 5500 Series