Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).Enters the BGP Address-Family IPv4 mode to allow entry of IPv4 BGP parameters for the BGP AS number.
Important: The route distinguisher ID must be configured for the VRF name via the route-distinguisher command in BGP VRF Configuration mode, before using this keyword.Enables the exchange of VRF routing information. When this keyword is specified with this command, the address family mode changed to VRF address family mode for specific BGP AS number. vrf_name is the name of an existing VFR expressed as an alphanumeric string of 1 through 63 characters.
Use of the address-family ipv4 command switches the command mode to BGP Address Family Configuration Mode; the CLI prompt changes to:
Use of address-family ipv4 vrf vrf_name command switches the command mode to BGP Address Family Configuration Mode; the CLI prompt changes to:
Enters the BGP Address-Family IPv6 mode to allow entry of IPv6 BGP parameters for the BGP AS number.
Use of address-family ipv6 command switches the command mode to BGP Address Family Configuration Mode; the CLI prompt changes to:
Enters the BGP Address-Family VPNv4 mode to allow entry of VPN BGP parameters for the BGP AS number.
Use of address-family vpnv4 command switches the command mode to BGP Address Family Configuration Mode; the CLI prompt changes to:
graceful-restart restart-time rest_time
Specifies the maximum time (in seconds) required for neighbor(s) to gracefully restart. rest_time must be an integer from 1 through 3600.
graceful-restart stalepath-time stale_time
Specifies the maximum time (in seconds) to retain stale paths from restarting neighbor(s). stale_time must be an integer from 1 through 3600.
graceful-restart update-delay rest_time
Specifies the maximum time (in seconds) to defer initial route-selection. update-delay must be an integer from 1 through 3600.
distance { admin distance prefix prefix_addr [ route-access-list list_name ] | bgp external ebgp_dist internal ibgp_dist local local_dist }
no distance { admin distance prefix prefix_addr [ route-access-list list_name ] | bgp [ external ebgp_dist internal ibgp_dist local local_dist ] }
admin distance: Specifies the administrative distance that you want to apply to the IP prefix. distance must be an integer from 1 through 254.
prefix prefix_addr: Specifies the IP prefix of routes that should have the admin distance applied. prefix_addr must be an IPv4 address in dotted-decimal notation and the number of subnet bits, representing the subnet mask in CIDR shorthand (for example, 10.1.1.1/24).
route-access-list list_name: Defines the name of a route access list that defines for which routes the administrative distance should be set.
external ebgp_dist: Sets the administrative distance for eBGP routes. ebgp_dist must be an integer from 1 through 254.
internal ibgp_dist: Sets the administrative distance for iBGP routes. ibgp_dist must be an integer from 1 through 254.
local local_dist: Sets the administrative distance for local routes. local_dist must be an integer from 1 through 254.
Use the following command to set the administrative distance to 100 for all routes that have an IP prefix of 192.168.0.0 with a netmask of 16 and are specified in a remote access list named racl1:
ProductAll
[ no ] ip vrf vrf_name
Specifies the IP VRF context configured in the Context configuration mode and to be associated with a BGP AS number. vrf_name must be an alphanumeric string of 1 through 79 characters identifying an existing instance.
The following command associates the pre-defined VRF context instance router_mpls to this BGP AS number:
ProductAll
ebgp max_num
Enables forwarding packets over multiple eBGP paths between neighbors and specifies the maximum number of eBGP paths. max_num must be an integer from 1 through 10.
ibgp max_num
Enables forwarding packets over multiple iBGP paths between neighbors and specifies the maximum number of iBGP paths. max_num must be an integer from 1 through 10.
To enable forwarding packets over multiple paths and set the maximum number of EBGP paths to 10, enter the following command:
[ no ] neighbor ip_address { activate | advertisement-interval adv_time | capability graceful-restart | default-originate [ route-map map_name ] | distribute-list dist_list { in | out } | ebgp-multihop [ max-hop number ] | encrypted password encrypted password | fall-over bfd [ multihop ] | filter-list filt_list { in | out } | max-prefix max_num [ threshold thresh_percent ] [ warning-only ] | next-hop-self | password password | remote-as AS_num | remove-private-AS | restart-time rest_time | route-map map_name { in | out } | send-community { both | extended | standard } | shutdown | srp-activated-soft-clear | timers { [ connect-interval conn_time ] | [ keepalive-interval keep_time holdtime-interval hold_time ] } | update-source ip_address | weight value }
neighbor ip_address
Specifies the IP address of a BGP neighbor. ip_address must be in IPv4 dotted-decimal or IPV6 colon-separated notation.
advertisement-interval adv_time
The minimum interval (in seconds) between sending BGP routing updates. adv_time must be an integer from 0 through 600. Default: 30
route-map map_name: Specifies the route-map that contains the criteria to originate default routes. map_name must be the name of an existing route-map in the current context.
Filters updates to and from this neighbor based on a route access list. dist_list: The name or number of an existing route-access-list. Default: No filtering is performed.
in: Indicates that incoming advertised routes should be filtered.
out: Indicates that outgoing advertised routes should be filtered.
[ max-hop ] number: Specifies the maximum number of hops allowed to reach a neighbor. number must be an integer from 1 through 255. Default hop count: 255
encrypted password encrypted password
Establishes BGP filters based on an AS path access list. filt_list is the name of an existing AS path access list.
in: Indicates that incoming advertised routes will be filtered.
out: Indicates that outgoing advertised routes will be filtered.
max_num: Specifies the maximum number of prefixes permitted. This must be an integer from 1 through 4294967295.
[ threshold thresh_percent ]: Specifies a percentage value of when the BGP table is full. When this value is reached, peer warnings are sent to the neighbor and the neighbor connection is reset. thresh_percent must be an integer from 1 through 100.
[ warning-only ]: Specifies that only a warning message is sent when the limit is exceeded. The neighbor connection is not reset
password password
remote-as AS_num
AS_num: Specifies the neighbor’s AS number as an integer from 1 through 65535.
restart-time rest_time
Specifies the maximum time (in seconds) required for a neighbor to restart. rest_time must be an integer between 1 and 3600.
Applies a route map to the neighbor. map_namei s the name of an existing route-map in the current context.
in: Indicates that the route map applies to incoming advertisements.
out: Indicates that the route map applies to outgoing advertisements.
both: Sends extended and standard community attributes.
extended: Sends extended community attributes.
standard: Sends standard community attributes.
timers {[ connect-interval conn_time ] | [ keepalive-interval keep_time holdtime-interval hold_time ]}
connect-interval conn_time: Specifies the connect timer in seconds. conn_time must be an integer from 0 through 65535. The default is 60 seconds.
keepalive-interval keep_time: The frequency (in seconds) at which the current BGP router sends keepalive messages to its neighbor. keep_time must be an integer from 0 through 65535. The default is 30 seconds.
Holdtime-interval hold_time: The interval (in seconds) the router waits for a keepalive message before declaring a neighbor dead. hold_time must be an integer from 0 through 65535. The default is 90 seconds.
update-source ip_address
Binds the specified IP address to the BGP socket that is used to communicate to the peer. ip_address is an IPv4 address in dotted-decimal notation.
weight value
Sets the default weight for routes from this neighbor. value must be an integer from 0 through 65535. Default: 0
The following command specifies that the neighbor at the IP address 192.168.100.25 has an AS number of 2000:
Specifies the IP address and netmask bits for the network to announce via BGP. ip_address is a network IPv4 address in dotted-decimal notation and mask is the number of subnet bits, representing a subnet mask in CIDR shorthand. These must be entered in the dotted-decimal notation/subnet bits format (for example, 10.1.1.1/24).
Filter routes through the specified route map before announcing the network. map_name is the name of the route-map to use specified as an alphanumeric string of 1 through 79 characters.
The following command redistributes OSPF routes after filtering them through the route map named Map1:
router-id ip_address
router-id ip_address
The following command sets the router ID to 192.168.100.25:
[ no ] scan-time time
scan-time time
Specifies the amount of time (in seconds) to wait between background scans to determine next-hop validity. time must be an integer from 5 through 60. Default: 60
keepalive-interval interval: Specifies the interval (in seconds) to wait between sending keepalive packets as an integer from 0 through 65535. Default: 30
holdtime-interval time: Specifies the interval (in seconds) after which the neighbor is considered dead if keepalive messages are not received as an integer from 0 through 65535.
