ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Border Gateway Protocol (BGPv4)
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EXAMPLE
This example configures a named standard community list LN that permits
routes with community value 100:10, denoting that they come from
autonomous system 100 and network 10.
Console(config)#ip community-list standard LN permit 100:10
Console(config)#
RELATED COMMANDS
neighbor send-community (1878)
match community (1902)
ip extcommunity-list This command configures an extended community access list. Use the no
form with only the access list name to disable its use, or with the relevant
parameters to remove a community attribute from the access list.
SYNTAX
[no] ip extcommunity-list
{1-99 | standard community-list-name {deny | permit}
[{rt | soo} extended-community-value]} |
{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 extended 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 extended
community attribute.
permit – Permits access for messages with matching extended
community attribute.
rt – The route target extended community attribute.
soo – The site of origin extended community attribute.
extended-community-value – The route target or site of origin in
one of the following formats:
AAAA:NN or AA:NNNN – Community-number to deny or permit.
The community number can either be formatted as a 4-byte
autonomous system number and a 2-byte network number, or
as a 2-byte autonomous system number and a 4-byte network
number, separated by one colon. Each 2-byte number can range
from 0 to 65535, and 4-byte numbers from 0 to 4294967295.
IP:NN – Community to deny or permit. The community number
is composed of a 4-byte IP address (representing the
autonomous system number) and a 2-byte network number,