Cisco NCS 6000 Series User Manual

PurposeCommand or Action
• If the route-policy keyword is omitted, then the
IPv4 or IPv6 default route is unconditionally
advertised at Level 2.
(Optional) Redistributes routes from one IS-IS instance
into another instance.
redistribute isis instance [ level-1 | level-2 | level-1-2
] [ metric metric ] [ metric-type { internal | external
}] [ policy policy-name ]
Step 6
• In this example, an IS-IS instance redistributes Level
1 routes from another IS-IS instance.
Example:
RP/0/RP0/CPU0:router(config-isis-af)# redistribute
isis 2 level-1
(Optional) Allows a Level 1-2 router to summarize Level
1 IPv4 and IPv6 prefixes at Level 2, instead of advertising
Do one of the following:
Step 7
• summary-prefix address / prefix-length [ level
{ 1 | 2 }]
the Level 1 prefixes directly when the router advertises
the summary.
• summary-prefix ipv6-prefix / prefix-length [ level
{ 1 | 2 }]
• This example specifies an IPv4 address and mask.
Example:
or
RP/0/RP0/CPU0:router(config-isis-af)#
summary-prefix 10.1.0.0/16 level 1
• This example specifies an IPv6 prefix, and the
command must be in the form documented in RFC
2373 in which the address is specified in hexadecimal
using 16-bit values between colons.
or
RP/0/RP0/CPU0:router(config-isis-af)#
summary-prefix 3003:xxxx::/24 level 1
• Note that IPv6 prefixes must be configured only in
the IPv6 router address family configuration submode,
and IPv4 prefixes in the IPv4 router address family
configuration submode.
(Optional) Configures the maximum number of parallel
paths allowed in a routing table.
maximum-paths route-number
Example:
Step 8
RP/0/RP0/CPU0:router(config-isis-af)#
maximum-paths 16
(Optional) Defines the administrative distance assigned to
routes discovered by the IS-IS protocol.
distance weight [ address / prefix-length [
route-list-name ]]
Step 9
Example:
• A different administrative distance may be applied
for IPv4 and IPv6.
RP/0/RP0/CPU0:router(config-isis-af)# distance 90
(Optional) Configures an IS-IS instance with an attached
bit in the Level 1 LSP.
attached-bit send { always-set | never-set }
Example:
Step 10
RP/0/RP0/CPU0:router(config-isis-af)# attached-bit
send always-set
commit
Step 11
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
233
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