User guide

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OFTWARE
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16-33
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APS
Figure 16-9: Route maps
The following points apply to this example:
• RTA is a member of in AS 1111 and peers with a router in the Internet to receive the
entire Internet routing table.
• RTB is a member of AS 2222, and has an EBGP connection with RTA through which
it receives the Internet routing table.
• AS 1111 is acting as a transit AS for all traffic between AS 2222 and the Internet. If
the administrator of AS 1111 wants to filter out route information about network
221.1.1.0 / 24 and it subnets from being passed on to AS 2222, s/he can configure a
route-map on the egress side of RTA's EBGP connection with RTB and filter out the
routes.
To configure RTA, use the following commands:
create access-profile iplist type ipaddress
config iplist add ipaddress 221.1.1.0 / 24
create route-map bgp-out
config bgp-out add 10 deny
config bgp-out 10 add match nlri-list iplist
EW_048
AS 1111
RTA
10.0.0.1
Internet
AS 2222
RTB
10.0.0.2