Aggregating Routes Advertised To Bgp4 Neighbors - Dell PowerConnect B-RX Configuration Manual

For example, to configure the redistribution of all RIPng routes into the BGP4+ unicast database,
enter the following commands at the BGP4+ address family configuration level:
BigIron RX(config-bgp-ipv6u)# redistribute rip
Syntax: redistribute <protocol> [level-1 | level-1-2 | level-2] [match external1 | external2 |
The <protocol> parameter can be connected, isis, ospf, rip, or static.
If you specify isis as the protocol, you can optionally specify the redistribution of level 1, level 1 and
2, or level 2 routes.
If you specify ospf as the protocol, you can optionally specify the redistribution of external 1,
external 2, or internal routes. (The default is internal.)
The metric <metric-value> parameter specifies the metric used for the redistributed route. If a
value is not specified for this option, and no value is specified using the default-metric command at
the BGP4+ unicast address family configuration level, the metric value for the IPv6 static, RIPng, or
IPv6 OSPF route is used. Use a value consistent with the destination protocol.
The <name> parameter specifies a route map name.

Aggregating routes advertised to BGP4 neighbors

By default, a switch advertises individual BGP4+ routes for all the networks. The aggregation
feature allows you to configure a switch to aggregate routes in a range of networks into a single
IPv6 prefix. For example, without aggregation, a switch will individually advertise routes for
networks ff00:f000:0001:0000::/64, ff00:f000:0002:0000::/64,ff00:f000:0003:0000::/64, and
so on. You can configure the switch to instead send a single, aggregate route for the networks. The
aggregate route would be advertised as ff00:f000::/24 to BGP4 neighbors.
To aggregate BGP4+ routes for ff00:f000:0001:0000::/64,
ff00:f000:0002:0000::/64,ff00:f000:0003:0000::/64, enter the following command.
BigIron RX(config-bgp)# aggregate-address ff00:f000::/24 summary-only
Syntax: aggregate-address <ipv6-prefix>/<prefix-length> [as-set] [summary-only] [suppress-map
The <ipv6-prefix>/<prefix-length> parameter specifies the aggregate value for the networks. You
must specify the <ipv6-prefix> parameter in hexadecimal using 16-bit values between colons as
documented in RFC 2373. You must specify the <prefix-length> parameter as a decimal value. A
slash mark (/) must follow the <ipv6-prefix> parameter and precede the <prefix-length>
parameter.
The as-set keyword causes the switch to aggregate AS-path information for all the routes in the
aggregate address into a single AS-path.
The summary-only keyword prevents the switch from advertising more specific routes contained
within the aggregate route.
The suppress-map <map-name> parameter prevents the more specific routes contained in the
specified route map from being advertised.
The advertise-map <map-name> parameter configures the switch to advertise the more specific
routes in the specified route map.
The attribute-map <map-name> parameter configures the switch to set attributes for the aggregate
routes based on the specified route map.
BigIron RX Series Configuration Guide
53-1002253-01
internal] [metric <metric-value>] [route-map <name>]
<map-name>] [advertise-map <map-name>] [attribute-map <map-name>]
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Configuring BGP4+
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