Edge-Core ECS4660-28F Management Manual page 1873

neighbor prefix-list
This command configures prefix restrictions applied in inbound/outbound
route updates to/from specified neighbors. Use the no form to remove the
neighbor binding for a prefix list.
S
YNTAX
neighbor {ip-address | group-name} prefix-list list-name {in | out}
no neighbor {ip-address | group-name} prefix-list {in | out}
ip-address – IP address of a neighbor.
group-name – A BGP peer group containing a list of neighboring
routers configured with the
list-name – Name of a prefix-list. The prefix list can be used to filter
the networks to import or export. (Range: 1-80 characters)
in – Filter inbound routing updates.
out – Filter outbound routing updates.
C M
OMMAND ODE
Router Configuration
D S
EFAULT ETTING
No prefix list restrictions are configured.
C U
OMMAND SAGE
First, configure a prefix list with the
◆
use this command to specify the neighbors to which it applies, and
whether it applies to inbound or outbound messages.
Filtering routes based on a prefix list searches for entries matching the
◆
router specified by this command. If a match is found and the entry is
configured to permit the route, the route will be imported or exported
as defined by this command. An empty prefix list permits all prefixes. If
a prefix does not match any entries in a list, the route is denied. When
multiple entries in the list match a prefix, the entry with the smallest
sequence number is used.
The search starts at the top of the prefix list. Once an entry matches,
◆
the router stops searching. To reduce the load on system resources, the
most commonly used entries should be placed at the top of the list.
E
XAMPLE
Console(config)#ip prefix-list RD permit 100.1.0.0 255.255.0.0 ge 17 le 18
Console(config)#router bgp 200
Console(config-router)#redistribute static
Console(config-router)#neighbor 10.1.1.66 prefix-list RD out
Console(config-router)#
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| IP Routing Commands
C 51
HAPTER
Border Gateway Protocol (BGPv4)
neighbor peer-group command.
ip prefix-list command, and then