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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Aggregating Routes

The Dell Networking OS provides multiple ways to aggregate routes in the BGP routing table. 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]

Example of Viewing Aggregated Routes

In the show ip bgp command, aggregates contain an ‘a’ in the first column (shown in bold) and routes suppressed by the aggregate contain an ‘s’ in the first column. 
Dell#show ip bgp
                                 BGP table version is 0, local router ID is 10.101.15.13
                                 Status codes: s suppressed, d damped, h history, * valid, > best
                                 Path source: I - internal, 
                                 a - aggregate, c - confed-external, r - redistributed, n - network
                                 Origin codes: i - IGP, e - EGP, ? - incomplete
                                 
                                 Network           Next Hop     Metric LocPrf Weight Path
                                 *> 7.0.0.0/29     10.114.8.33  0             0 18508 ?
                                 *> 7.0.0.0/30     10.114.8.33  0             0 18508 ?
                                 *
                                 >a 9.0.0.0/8     192.0.0.0              32768 18508 701 {7018 2686 3786} ?

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