O'Reilly logo

Cisco® BGP-4 Command and Configuration Handbook (CCIE Professional Development) by William R. Parkhurst Ph.D.

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

1-6. aggregate-address address mask summary-only

Syntax Description:

  • address— Aggregate IP address.

  • mask— Aggregate mask.

Purpose: To create an aggregate entry in the BGP table. An aggregate is created only if a more-specific route of the aggregate exists in the BGP table. This form of the aggregate-address command advertises the aggregate while suppressing all the more-specific routes.

Cisco IOS Software Release: 10.0

Configuration Example: Advertise an Aggregate While Suppressing the More-Specific Routes

In Figure 1-7, Router B is generating an aggregate for 172.16.0.0/22 while suppressing the specific routes that comprise the aggregate.

Figure 1-7. Suppressing the Specific Routes of the Aggregate
Router A
router bgp 1
neighbor 10.1.1.2 remote-as ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required