summary-address (IS-IS)

Configures route summarization to aggregate Intermediate System-to-Intermediate System (IS-IS) route information.

Syntax

summary-address ip-address subnet-mask level-1 [ level-2 ]

summary-address ip-address subnet-mask level-2 [ level-1 ]

no summary-address ip-address subnet-mask level-1 [ level-2 ]

no summary-address ip-address subnet-mask level-2 [ level-1 ]

Command Default

Disabled.

Parameters

ip-address: Specifies an IP address.
subnet-mask: Specifies a subnet mask.
level-1: Specifies that only routes redistributed into Level 1 are summarized with the configured address and mask value.
level-2: Specifies that only routes redistributed into Level 2 are summarized with the configured address and mask value.

Modes

IS-IS address-family IPv4 unicast configuration mode

Usage Guidelines

Route Summarization using this command is applicable only for redistributed routes.

The no form of the command disables route summarization.

MPLS is supported on the Extreme 8820, SLX 9740, SLX 9640, and SLX 9540 devices only.

Examples

The following example configures a summary address of 10.1.0.0 with a mask of 255.255.0.0 for Level 1 redistributed routes.

device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family ipv4 unicast
device(config-router-isis-ipv4u)# summary-address 10.1.0.0 255.255.0.0 level-1

The following example configures a summary address of 10.1.0.0 with a mask of 255.255.0.0 for Level 2 redistributed routes.

device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family ipv4 unicast
device(config-router-isis-ipv4u)# summary-address 10.1.0.0 255.255.0.0 level-2

The following example configures a summary address of 10.1.0.0 with a mask of 255.255.0.0 for Level 1 and Level 2 redistributed routes.

device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family ipv4 unicast
device(config-router-isis-ipv4u)# summary-address 10.1.0.0 255.255.0.0 level-1 level-2