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Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

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Aggregating Routes

When BGP peers exchange information about the networks, a large BGP routing tables is created. Dell EMC Networking OS provides multiple ways to aggregate routes to reduced the size of the BGP routing table which helps to improve the network performance by reducing the convergence time. You can configure BGP to configure and advertise aggregated routes. At least one specific route of the aggregate must be in the routing table for the configured aggregate to become active.

To aggregate routes, use the following command.

AS_SET includes AS_PATH and community information from the routes included in the aggregated route.

Assign the IP address and mask of the prefix to be aggregated.
CONFIG-ROUTER-BGP mode
aggregate-address ip-address mask [advertise-map map-name] [as-set] [attribute-map map-name] [summary-only] [suppress-map map-name]

  • as-set- Specify that the advertised path of this route is an AS_SET.

  • summary-only-Create aggregate route and suppress advertisements of specific routes to all neighbors.

  • suppress-map map-name-Create aggregate route by suppressing the advertisements of specific routes.

  • advertise-map map-name-Create aggregate route by advertising specific routes.

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