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BGP and BGP4+ Configuration
Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches
C613-50032-01 REV D AlliedWare Plus
TM
Operating System - Software Version 5.4.3-2.6 2.31
Configuring Route-Maps with BGP4+
Use route-maps to filter incoming updates from a BGP4+ peer. In this example, a prefix-list
named list1 on Router 1 is configured to deny entry of any routes with the IPv6 address
2001::db8:12::/48. To test the route-map filter , Router 2 is configured to advertise
IPv6 network prefixes 2001:db8:11::/48 and 2001:db8:12::/48.
Use the show bgp ipv6 command on Router 1 to verify only the 2001:db8:11::/48
network prefix has been installed in the BGP table.
Router 1
bgp4+_4
Router ID 192.168.10.10
Router ID 192.168.10.11
AS10 AS11
Router 1
2001:db8::10:10
Router 2
2001:db8::10:11
awplus#
configure terminal
Enter the Global Configuration mode.
awplus(config)#
ipv6 prefix-list FILTER_LIST_IN
seq 5 deny 2001:db8:12::/48
Create an entry in the prefix-list named FILTER_LIST_IN
for the route-map. 5 specifies the sequence number or
position of this specific route-map. deny specifies that
prefixes will be rejected. permit specifies that prefixes will
be allowed. 48 and 64 are the minimum and maximum prefix
lengths, respectively, to be matched for this route-map. The
prefix-list permits or denies selected prefixes from being
installed in the BGP table, when used in a route map with the
route map applied to the peering.
awplus(config)#
ipv6 prefix-list FILTER_LIST_IN
seq 10 permit any
Create another entry in the prefix-list named
FILTER_LIST_IN for the route-map. 10 specifies the
sequence number or position of this specific route-map.
permit any specifies prefix-list FILTER_LIST_IN to
accept all prefixes of any length. The prefix-list permits or
denies selected prefixes from being installed in the BGP table,
when used in a route map with the route map applied to the
peering.
awplus(config#
route-map FILTER_BGP_IN_MAP
permit 1
Enter the Route-map Configuration mode from the Global
Configuration mode and creates the route-map named
FILTER_BGP_IN_MAP. The route-map matches on the
prefix-list.
awplus(config-route-map)#
match ipv6 address prefix-list
FILTER_LIST_IN
Set the match criteria for the route-map. In this case, if the
route-map name matches FILTER_LIST_IN, then the first
sequence 5 denies prefixes and the second sequence 10
accepts prefixes.