先实现AS200内全网通信（RIP协议），再实现AS300内全网通信（OSPF协议），在AS200内R1和R2建立邻居（使用接口地址建立邻居），在AS300内R3和R4建立邻居（使用Loopback建立邻居）。 R1的配置：[R1]bgp 200 [R1-bgp]peer 12.0.0.2 as-number 200 R2的配置：[R2]bgp 200 [R2-bgp]peer 12.0.0.1 ...
BGP neighbor is Pretty, peer-group internal, members: //对等体成员 1.1.1.1 2.2.2.2 Index 0, Advertise bit 0 NEXT_HOP is always this router for eBGP paths // 下一条一直是本路由 Interface associated: (none) Update messages formatted 0, replicated 0 Number of NLRIs in the update sent: m...
先建立邻居: R1#router bgp 100 (一个路由器上只能配置一个AS,否则会提示是:BGP is already running AS is 100 ) Neighbor 12.1.1.2 remote-as 200 指定邻居关系,指定远端的AS号(也就是对端的AS号)注:在bgp路由器上也有router ID ,选举规则是和OSPF一样的,也可以手动指router ID。 Router bgp 100 Bgp...
As this type of attribute is optional, it is not necessarily carried in Update messages. Optional transitive: This indicates the transitive attribute between ASs. A BGP device may not recognize this type of attribute, but will still accept messages carrying it and advertise them to other peers....
After receiving a route from another AS, the BGP speaker compares the route with its local routes. If the route is better than its local routes, or the route is new, the speaker advertises it to all its other remote BGP speakers except the one that has advertised the route. Peer: BGP...
Segments associated with a BGP prefix are known as BGP prefix SIDs. The BGP prefix SID is global within a segment routing or BGP domain. It identifies an instruction to forward the packet over the ECMP-aware best-path computed by BGP...
If so, the rd auto command assigns a Type 1 route distinguisher to the VRF using the following format: ip-address:number. The IP address is specified by the BGP router-id statement and the number (which is derived as an unused index in the 0 to 65535 range) is unique across the V...
> I have found out if you use "network statements" under BGP then there is a Limit of "200". This limit has been removed in Cisco IOS 12.0. The maximum number of BGP network statements is limited only by available resources
关于BGP的community扩展属性,也称为团体属性,可以理解为一个简化版的策略,这里主要列举三个关于简化策略的点: no-export-只在IBGP的环境下传递,不会传给其他的AS no-advertise-下一台设备收到,不再往下传递 local-as-不会传出联盟AS R1和R2之间使用直连接口运行建立EBGP邻居,R2,R3,R4属于AS200(AS200中包含两...
bgp as-number [ instance instance-name ] 3. Set the TCP MSS for a peer or peer group. peer { group-name | ipv4-address [ mask-length ] | ipv6-address [ prefix-length ] } tcp-mss mss-value By default, the TCP MSS is not set. Enabling BGP to establish an EBGP session over mul...