# summary-prefix

#### Syntax

For IS-IS from Address Family Configuration mode:

summary-prefix ipv6Prefix [ level-1 | level-1-2 | level-2 ] [ metricValue ] [ tagValue ]

no summary-prefix ipv6Prefix

For OSPFv3 from Router Configuration mode:

[ no ] summary-prefix ipv6Prefix/ipv6prefixLength

#### Release Information

Command introduced before JunosE Release 7.1.0.
IS-IS version added in JunosE Release 8.2.0.

#### Description

In Address Family configuration mode, aggregates external IPv6 routes at the border of the IS-IS domain. In Router Configuration mode, aggregates external IPv6 routes at the border of the OSPFv3 domain. The no version restores the default.

#### Options

- level-1—Specifies the aggregation of IPv6 routes into IS-IS level 1
- level-1-2—Specifies the aggregation of IPv6 routes into IS-IS level 1 and level 2
- level-2—Specifies the aggregation of IPv6 routes into IS-IS level 2
- metricValue—Metric (cost) for the interface to links at the specified level; number in the range 1–16777215
- tagValue—Number in the range 1–4294967295 that identifies the route tag assigned to the IS-IS interface
- ipv6Prefix—IPv6 network number
- ipv6PrefixLength—Length of the IPv6 prefix; a decimal value that indicates how many of the higher-order contiguous bits of the IPv6 address comprise the prefix (the network portion of the IPv6 address). A slash (/) must precede this value.

#### Mode

Address Family Configuration (IS-IS), Router Configuration (OSPFv3)