!--- This also make this router to prepend AS 200 in !--- all updates to ISP-C.network 192.168.4.0 ! ! ISP-C (AS 300) hostname ISP-C ! interface serial 1 ip address 192.168.1.2 255.255.255.252 ! interface ethernet 0 ip address 192.168.9.1 255.255.255.0 ! router bgp 300 neighbor...
このドキュメントでは、Cisco IOS®ソフトウェアリリース12.0(5)Sで最初に使用可能になったボーダーゲートウェイプロトコル(BGP)ローカルAS機能について説明します。 前提条件 要件 このドキュメントでは、BGPルーティングプロトコルとその動作に関する知識を推奨しています。詳細について...
Lab AS-Path prepend last-as Platform:cisco iou step 1:load config file(config.txt) step 2:show ip bgp one the R4 去往 1.1.1.1 走R1,因为AS-Path比较短。 step 3:通过修改as-path影响R4选路。 R4: router bgp 4 nei 14.1.1.1 route-map F1 in route-map F1 set as-path prepend last-as ...
To not create a routing loop or other problemes, i think to use "as-prepend" on Local-A to influence inbound traffic. (And so the prefer path is to Local-B for all routes).My question : Is possible to do that with bgp on cisco routers ? Maybe there is a better solution ? Restr...
to me if i advertized 1.1.1.0 and 2.2.2.0 to isp a and prepend my as multiple times, it seems to me that traffic destined for 1.1.1.0 or 2.2.2.0 will always come via isp b because it will have the shortest as path. my question is that when i create the route-map to influence ...
思科BGP AS-PATH配置实例 Cisco BGP AS-PATH配置实例如下图示: R1:interfaceLoopback0 ip address1.1.1.1255.255.255.255interfaceFastEthernet0/0ip address12.1.1.1255.255.255.0interfaceFastEthernet0/1ip address14.1.1.1255.255.255.0router eigrp1network1.1.1.10.0.0.0network12.1.1.00.0.0.255network14.1.1.00....
Tag:AS prepend 4-2-1. Cisco dual BGP with prefix Length (Load-balancing) Posts navigation ← Older posts Categories About Show IP BGP(2) BGP Attribution(2) BGP Community List(17) BGP Knowledge(18) BGP path Selection(2) BGP Professional Service(1) ...
set as-path prepend 300 400 route-map aspath 20 /// r2 /// int f2/0 ip ad 192.1.1.2 255.255.255.0 int f4/0 ip ad 194.1.1.2 255.255.255.0 router os 1 netw 0.0.0.0 255.255.255.255 a 0 passive-interface f2/0 router bgp 200 no ...
注意我将route-map setAS-PATH 用到了13.0.0.1的入方向,之后clear ip bgp * soft以后,最后结果终于如我们所愿,路由bgp已经舍近求远了。 总结,AS-path属性比较简单,关于比较原则: AS号少的路由为最优路由.可以通过命令set as-path prepend命令在原来有的as号前再进行人为的添加,让这条路有劣于其他的路由。
操纵BGP路由过滤(基于AS-PATH)实例cisco中文社区感谢jackson支持原创这个案例通过在r3上配置与访问列表结合的正则表达式以阻止通过bgp发送过来的网络能通过as300传到r4 BGP实验操纵BGP路由过滤(基于AS-PATH)实际案例(配图+详细验证过程) 作者:JACKSON参考:CISCO中文社区感谢JACKSON支持原创 as-path.gif(12.7 KB) 2008-9-...