Chapter 29
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 924 –
Example
The regular expression in this example uses symbols which instruct the filter to
match the character or null string at the beginning and end of an input string.
Console(config-router)#ip as-path access-list RD deny ^100$
Console(config-router)#
Related Commands
neighbor filter-list (958)
match as-path (996)
ip community-list This command configures a community access list. Use the no form with only the
access list name to disable its use, or with all parameters to remove a community
attribute from the access list.
Syntax
[no] ip community-list
{1-99 | standard community-list-name {deny | permit}
[AA:NN] [internet] [local-as] [no-advertise] [no-export]} | {100-500 |
expanded community-list-name {deny | permit} regular-expression}
1-99 – Standard community list number that identifies one or more groups
of communities.
standard community-list-name – Name of standard access list. A maximum
of 16 communities can be configured in a standard community list
(Maximum length: 32 characters, no spaces or other special characters)
deny – Denies access to messages with matching community attribute.
permit – Permits access for messages with matching community attribute.
AA:NN – Standard community-number to deny or permit. The 4-byte
community number is composed of a 2-byte autonomous system number
and a 2-byte network number, separated by one colon. Each 2-byte
number can range from 0 to 65535. One or more communities can be
entered, separated by a space. Up to 16 community numbers are
supported.
internet – Specifies the entire Internet. Routes with this community
attribute are advertised to all internal and external peers.
local-as – Specifies the local autonomous system. Routes with this
community attribute are advertised only to peers that are part of the local
autonomous system or to peers within a sub-autonomous system of a
confederation. These routes are not advertised to external peers or to other
sub-autonomous systems within a confederation.
no-advertise – Routes with this community attribute are not advertised to
any internal or external peer.
To Next Page
Loading...
Need help?
General