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[ Pobierz całość w formacie PDF ] Command Modes Router configuration Command History Release Modification 12.0 This command was introduced. Usage Guidelines The timers configured for a specific neighbor or peer group override the timers configured for all BGP neighbors using the command timers bgp. Examples The following example changes the keepalive timer to 70 seconds and the holdtime timer to 210 seconds for the BGP peer 192.98.47.0: router bgp 109 neighbor 192.98.47.0 timers 70 210 Network Protocols Command Reference, Part 1 P1R-430 BGP Commands neighbor update-source neighbor update-source To have the Cisco IOS software allow Border Gateway Protocol (BGP) sessions to use a specific operational interface for TCP connections, use the neighbor update-source command in router configuration mode. To restore the interface assignment to the closest interface, which is called the best local address, use the no form of this command. neighbor {ip-address | peer-group-name} update-source interface no neighbor {ip-address | peer-group-name} update-source interface Syntax Description ip-address IP address of the BGP-speaking neighbor. peer-group-name Name of a BGP peer group. interface-type Interface to be used as the source. Defaults Best local address Command Modes Router configuration Command History Release Modification 10.0 This command was introduced. Usage Guidelines This command works in conjunction with any specified interface on the router. The loopback interface is the interface that is most commonly used with this feature. For more information, refer to the loopback interface feature described in the Interface Configuration Overview chapter of the Cisco IOS Interface Configuration Guide. If you specify a BGP peer group by using the peer-group-name argument, all the members of the peer group will inherit the characteristic configured with this command. Examples The following example sources BGP TCP connections for the specified neighbor with loopback interface s IP address rather than the best local address: router bgp 110 network 172.16.0.0 neighbor 172.16.2.3 remote-as 110 neighbor 172.16.2.3 update-source Loopback0 Related Commands Command Description neighbor peer-group (creating) Creates a BGP peer group. Network Protocols Command Reference, Part 1 P1R-431 BGP Commands neighbor version neighbor version To configure the Cisco IOS software to accept only a particular BGP version, use the neighbor version command in router configuration mode. To use the default version level of a neighbor, use the no form of this command. neighbor {ip-address | peer-group-name} version value no neighbor {ip-address | peer-group-name} version value Syntax Description ip-address IP address of the BGP-speaking neighbor. peer-group-name Name of a BGP peer group. value BGP version number. The version can be set to 2 to force the software to use only Version 2 with the specified neighbor. The default is to use Version 4 and dynamically negotiate down to Version 2 if requested. Defaults BGP Version 4 Command Modes Router configuration Command History Release Modification 10.0 This command was introduced. Usage Guidelines Entering this command disables dynamic version negotiation. Our implementation of BGP supports BGP Versions 2, 3, and 4. If the neighbor does not accept default Version 4, dynamic version negotiation is implemented to negotiate down to Version 2. If you specify a BGP peer group by using the peer-group-name argument, all the members of the peer group will inherit the characteristic configured with this command. Examples The following example locks down to Version 4 of the BGP protocol: router bgp 109 neighbor 131.104.27.2 version 4 Related Commands Command Description neighbor peer-group (creating) Creates a BGP peer group. Network Protocols Command Reference, Part 1 P1R-432 BGP Commands neighbor weight neighbor weight To assign a weight to a neighbor connection, use the neighbor weight command in router configuration mode. To remove a weight assignment, use the no form of this command. neighbor {ip-address | peer-group-name} weight weight no neighbor {ip-address | peer-group-name} weight weight Syntax Description ip-address Neighbor s IP address. peer-group-name Name of a BGP peer group. weight Weight to assign. Acceptable values are 0 to 65535. Defaults 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 Router configuration Command History Release Modification 10.0 This command was introduced. Usage Guidelines All routes learned from this neighbor will have the assigned weight initially. The route with the highest weight will be chosen as the preferred route when multiple routes are available to a particular network. The weights assigned with the match as-path and set weight route-map commands override the weights assigned using the neighbor weight and neighbor filter-list commands. Note For weight changes to take effect, it may be necessary to use clear ip bgp peer-group *. If you specify a BGP peer group by using the peer-group-name argument, all the members of the peer group will inherit the characteristic configured with this command. Examples The following example sets the weight of all routes learned via 172.16.12.1 to 50: router bgp 109 neighbor 172.16.12.1 weight 50 Network Protocols Command Reference, Part 1 P1R-433 BGP Commands neighbor weight Related Commands Command Description neighbor distribute-list Distributes BGP neighbor information as specified in an access list. neighbor filter-list Sets up a BGP filter. neighbor peer-group (creating) Creates a BGP peer group. Network Protocols Command Reference, Part 1 P1R-434 BGP Commands network (BGP) network (BGP) To specify the list of networks for the Border Gateway Protocol (BGP) routing process, use this form of the network command in router configuration mode. To remove an entry, use the no form of this command. network network-number [mask network-mask] [route-map map-name] no network network-number [mask network-mask] [route-map map-name] Syntax Description network-number Network that BGP will advertise. mask Network or subnetwork mask. If the mask keyword is configured, then an exact match must exist in the routing table. network-mask (Optional) Network mask address. [ Pobierz całość w formacie PDF ] |