Chapter 29
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 928 –
â—† Use this command in conjunction with the neighbor filter-list to filter route
updates sent to or received from a neighbor, or with the match extcommunity
route map command to implement a more comprehensive filter for policy-
based routing.
Example
This example configures a named standard community list LR that permits routes
with the route target 100:20, denoting that they destined for the autonomous
system 100 and network 20.
Console(config)#ip extcommunity-list standard LP permit soo 100:20
Console(config)#
Related Commands
neighbor filter-list (958)
match extcommunity (997)
ip prefix-list This command configures an IP address prefix list. Use the no form with only the
prefix list name to disable its use, or with the relevant parameters to remove an
attribute from the prefix list.
Syntax
[no] ip prefix-list prefix-list-name [seq sequence-number]
{deny | permit} any
[no] ip prefix-list prefix-list-name [seq sequence-number]
{deny | permit} {ip-address netmask | any}
[ge min-prefix-length] [le max-prefix-length]
prefix-list-name – Name of prefix list. (Maximum length: 128 characters, no
spaces or other special characters)
sequence-number – Applies a sequence number to the entry. If not
specified, the entry is added to the bottom of the list, using a default
numbering interval of 5. (Range: 1-429496725)
deny – Denies access to messages matching specified criteria.
permit – Permits access for messages matching specified criteria.
any – Any matching criteria.
ip-address – An IPv4 address expressed in dotted decimal notation.
netmask – Network mask for the route. This mask identifies the network
address bits used for the associated routing entries.
ge – The minimum prefix length to match.
le – The maximum prefix length to match.
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