[系统运维]00 BGP常用命令速查

相关链接

【cisco 命令参考手册】https://www.cisco.com/c/en/us/support/ios-nx-os-software/ios-15-5m-t/products-command-reference-list.html
【GNS3官网】https://gns3.com/
【GNS3下载】https://gns3.com/software/download
【appliances】https://gns3.com/marketplace/appliances

SecureCRT的快捷键

• Ctrl + Tab 切换窗口
• Alt + num 快速切换到指定窗口
• Ctrl + A 回到命令最前面
• Ctrl + E 回到命令最后面

#断开bgp邻居并重新建立，默认为硬重置，soft为软清除
clear ip bgp
'''perform a hard reset of all current BGP sessions.
'''After enabling thebgpasnotationdot command, a hard reset must be initiated for all BGPsessions by entering the clear ip bgp * command.
clear ip bgp * soft

BGP 命令汇总

BGP Command Reference

aggregate-address

aggregate-address address mask [as-set] [as-confed-set] [summary-only] [suppress-map map-name]
[advertise-map map-name] [attribute-map map-name]
no aggregate-address address mask [as-set] [as-confed-set] [summary-only] [suppress-map
map-name] [advertise-map map-name] [attribute-map map-name]

Command Default ?The atomic aggregate attribute is set automatically when an aggregate route is created with this command unless the as-set keyword is specified.

Command Modes ??Address family configuration (config-router-af)
????????????Router configuration (config-router)

ip prefix-list

To create a prefix list or to add a prefix-list entry, use the ip prefix-list command in global configuration mode. To delete a prefix-list entry, use the no form of this command.

ip prefix-list {list-name [seq number] {deny | permit} network/length [ge ge-length] [le le-length]
| description description | sequence-number}
no ip prefix-list {list-name [seq number] [{deny | permit} network/length [ge ge-length] [le
le-length]] | description description | sequence-number}

Command Default ?No prefix lists or prefix-list entries are created.

Command Modes ??Global configuration (config)

route-map (IP)

Defines the conditions for redistributing routes from one routing protocol into another, or enables policy routing.

match ip address prefix-list

Matches routes that pass a prefix list.

set origin

To set the BGP origin code, use the set origin command in route-map configuration mode. To delete an entry, use the no form of this command.

set origin {igp | egp autonomous-system-number | incomplete}
no set origin {igp | egp autonomous-system-number | incomplete}

Command Default ?The origin of the route is based on the path information of the route in the main IP routing table.

Command Modes ??Route-map configuration (config-route-map)

neighbor route-map

To apply a route map to incoming or outgoing routes, use the neighbor route-map command in address family or router configuration mode. To remove a route map, use the no form of this command.

neighbor{ip-address peer-group-name | ipv6-address[{%}]}route-map map-name{in | out}
no neighbor{ip-address peer-group-name | ipv6-address[{%}]}route-map map-name{in | out}

Command Default ?No route maps are applied to a peer.

Command Modes ??Router configuration (config-router)

set as-path

When you manually set the OSPF route tag, to convert the tag into an autonomous system path for BGP routes,
use the set as-path command in the route-map configuration mode. To not modify the autonomous system
path, use the no form of this command.

set as-path {tag | prepend as-path-string}
no set as-path {tag | prepend as-path-string}

The set as-path command and the associated no command have no effect when the OSPF route tag is automatically set through IBGP. When the ASN is received from an IBGP peer, the ASN is set as the OSPF route tag and converted into an autonomous system path for BGP routers.

Command Default ?An autonomous system path is not modified automatically when you manually set an OSPF route tag. You must convert the OSPF route tag into an autonomous system path.

Command Modes ??Route-map configuration (config-route-map)

set local-preference

Specifies a preference value for the autonomous system path.

bgp default local-preference

To change the default local preference value, use the bgp default local-preference command in router
configuration mode. To return the local preference value to the default setting, use the no form of this command.

bgp default local-preference number
no bgp default local-preference number

Command Default Cisco IOS software applies a local preference value of 100 if this command is not enabled or if the no form
of this command is entered.

Command Modes Router configuration (config-router)

neighbor weight

To assign a weight to a neighbor connection, use the neighbor weight command in address family or router
configuration mode. To remove a weight assignment, use the no form of this command.

neighbor {ip-address | peer-group-name} weight number
no neighbor {ip-address | peer-group-name} weight number

Command Default ?Routes learned through another BGP peer have a default weight of 0 and routes sourced by the local router have a default weight of 32768.

Command Modes ??Address family configuration (config-router-af)

? Router configuration (config-router)

set weight

To specify the BGP weight for the routing table, use the set weight command in route-map configuration
mode. To delete an entry, use the no form of this command.

set weight number
no set weight number

Command Default ?The weight is not changed by the specified route map.

Command Modes ?? Route-map configuration (config-route-map)

bgp confederation identifier

To specify a BGP confederation identifier, use the bgp confederation identifier command in router configuration mode. To remove the confederation identifier, use the no form of this command.

bgp confederation identifier autonomous-system-number
no bgp confederation identifier autonomous-system-number

Command Default ?No BGP confederation identifier is identified.

Command Modes ? Router configuration (config-router)

bgp confederation peers

To configure subautonomous systems to belong to a single confederation, use the bgp confederation peers command in router configuration mode. To remove an autonomous system from the confederation, use the no form of this command.

bgp confederation peers autonomous-system-number [… autonomous-system-number]
no bgp confederation peers autonomous-system-number [… autonomous-system-number]

Command Default ?No BGP peers are configured to be members of a BGP confederation.

Command Modes ??Router configuration (config-router)

set community

To set the BGP communities attribute, use the set community route map configuration command. To delete
the entry, use the no form of this command.

set community {community-number [additive] [well-known-community] | none}
no set community

Command Default ?No BGP communities attributes exist.

Command Modes ??Route-map configuration (config-route-map)

neighbor send-community

To specify that a communities attribute should be sent to a BGP neighbor, use the neighbor send-community
command in address family or router configuration mode. To remove the entry, use the no form of this
command.

neighbor {ip-address ipv6-address peer-group-name} send-community [{both | standard | extended}]
no neighbor {ip-address ipv6-address peer-group-name} send-community

Command Default ?No communities attribute is sent to any neighbor.

Command Modes ??Address family configuration (config-router-af)

????????????Router configuration (config-router)