Administrator Guide
neighbor filter-list
Configure a BGP filter based on the AS-PATH attribute.
C9000 Series
Syntax
neighbor {ipv6-address | peer-group-name} filter-list as-path-name {in | out}
To delete a BGP filter, use the no neighbor {ipv6-address | peer-group-name} filter-list
as-path-name {in | out} command.
Parameters
ipv6-address
Enter the IPv6 address in the x:x:x:x::x format.
NOTE: The :: notation specifies successive hexadecimal fields of zeros.
peer-group-name
Enter the name of the peer group to apply the filter to all routers in the peer group.
as-path-name
Enter the name of an established AS-PATH access list. If you do not configure the AS-
PATH access list, the default is permit (to allow routes). The maximum is 16 characters.
in Enter the keyword in to filter inbound BGP routes.
out Enter the keyword out to filter outbound BGP routes.
Defaults Not configured.
Command Modes ROUTER BGPV6-ADDRESS FAMILY
Command History
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.2.1.0 Introduced on the E-Series ExaScale.
7.4.1.0 Introduced
neighbor maximum-prefix
Control the number of network prefixes received.
C9000 Series
Syntax
neighbor {ipv6-address | peer-group-name} maximum-prefix maximum [threshold]
[warning-only]
To return to the default values, use the no neighbor {ipv6-address | peer-group-name}
maximum-prefix maximum [threshold] [warning-only] command.
Parameters
ipv6-address
Enter the IPv6 address in the x:x:x:x::x format.
NOTE: The :: notation specifies successive hexadecimal fields of zeros.
peer-group-name
Enter the name of the peer group.
maximum
Enter a number as the maximum number of prefixes allowed for this BGP router. The
range is 1 to 4294967295.
threshold
(OPTIONAL) Enter a number to be used as a percentage of the maximum value. When
the number of prefixes reaches this percentage of the maximum value, the software
sends a message. The range is 1 to 100 percent. The default is 75.
warning-only (OPTIONAL) Enter the keywords warning-only to set the router to send a log
message when the maximum value is reached. If you do not set this parameter, the router
stops peering when the maximum number of prefixes is reached.
Border Gateway Protocol 451