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 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 (1867)
match extcommunity (1903)
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.
COMMAND MODE
Global Configuration
DEFAULT SETTING
No prefix lists are defined.
COMMAND USAGE
◆ Prefix filtering can be performed on an IP address expressed as a
classful network, a subnet, or a single host route.