BGP本地优先属性详解配置下载_Word模板_7

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BGP本地优先属性详解配置Local-pre属性（默认100） BGP路由器通过不同的IBGP得到达到目的地址的多条路径，通过Local-pre属性的调整控制流量方向。(环路可能产生AS—Path可避免) 全局调整—调整全部经过的流量 Default local-preference 200(BGP进程中) 局部调整—调整特定的流量拓扑：实验目的：局部调整,r1到192.168.1.100的路由路径的改变. 配置： r1 dis current-configuration # sysname r1 # interface ...

Local-pre属性（默认100） BGP路由器通过不同的IBGP得到达到目的地址的多条路径，通过Local-pre属性的调整控制流量方向。(环路可能产生AS—Path可避免) 全局调整—调整全部经过的流量 Default local-preference 200(BGP进程中) 局部调整—调整特定的流量拓扑：实验目的：局部调整,r1到192.168.1.100的路由路径的改变. 配置： r1 dis current-configuration # sysname r1 # interface Serial0/0/1 link-protocol ppp undo shutdown ip address 202.1.1.1 255.255.255.252 # interface Serial0/0/2 link-protocol ppp undo shutdown ip address 202.1.1.5 255.255.255.252 # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # interface LoopBack100 # bgp 100 router-id 1.1.1.1 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 peer 3.3.3.3 as-number 100 peer 3.3.3.3 connect-interface LoopBack0 # ipv4-family unicast undo synchronization import-route ospf 1 peer 2.2.2.2 enable peer 2.2.2.2 route-policy loca-pre import peer 3.3.3.3 enable # ospf 1 import-route bgp area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 202.1.1.0 0.0.0.3 network 202.1.1.4 0.0.0.3 # route-policy loca-pre permit node 10 if-match ip-prefix loca-pre apply local-preference 200 # route-policy loca-pre permit node 20 # ip ip-prefix loca-pre index 10 permit 192.168.1.100 32 # user-interface con 0 user-interface vty 0 4 user-interface vty 16 20 # r2 dis current-configuration # sysname r2 # interface Serial0/0/0 link-protocol ppp undo shutdown ip address 202.1.1.9 255.255.255.252 # interface Serial0/0/1 link-protocol ppp undo shutdown ip address 202.1.1.2 255.255.255.252 # interface LoopBack0 ip address 2.2.2.2 255.255.255.255 # interface LoopBack100 # bgp 100 peer 1.1.1.1 as-number 100 peer 1.1.1.1 connect-interface LoopBack0 peer 3.3.3.3 as-number 100 peer 3.3.3.3 connect-interface LoopBack0 # ipv4-family unicast undo synchronization import-route ospf 1 peer 1.1.1.1 enable peer 3.3.3.3 enable # ospf 1 import-route bgp area 0.0.0.0 network 2.2.2.2 0.0.0.0 network 202.1.1.0 0.0.0.3 network 202.1.1.8 0.0.0.3 network 192.168.1.1 0.0.0.0 network 192.168.1.100 0.0.0.0 # r3 dis current-configuration # sysname r3 # interface Serial0/0/0 link-protocol ppp undo shutdown ip address 202.1.1.10 255.255.255.252 # interface Serial0/0/2 link-protocol ppp undo shutdown ip address 202.1.1.6 255.255.255.252 # interface LoopBack0 ip address 3.3.3.3 255.255.255.255 # interface LoopBack100 ip address 192.168.1.100 255.255.255.255 # bgp 100 router-id 3.3.3.3 peer 1.1.1.1 as-number 100 peer 1.1.1.1 connect-interface LoopBack0 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 # ipv4-family unicast undo synchronization import-route ospf 1 peer 1.1.1.1 enable peer 2.2.2.2 enable # ospf 1 import-route bgp area 0.0.0.0 network 3.3.3.3 0.0.0.0 network 202.1.1.4 0.0.0.3 network 202.1.1.8 0.0.0.3 network 192.168.1.100 0.0.0.0 # R1查看开始前 [r1-bgp]dis bgp routing-table BGP 本地路由器标识符: 1.1.1.1 路由状态代码: * 有效路由, > 最佳路由, d 振荡抑制, h 历史路由, i 内部路由, s 聚合抑制, S 过时路由 Origin 类型代码: i - IGP, e - EGP, ? - incomplete Total Number of Routes: 21 Network Next Hop MED LocPrf PrefVal Path/Ogn *> 1.1.1.1/32 0.0.0.0 0 0 ? * i 2.2.2.2 1562 100 0 ? * i 3.3.3.3 1562 100 0 ? *> 2.2.2.2/32 0.0.0.0 1562 0 ? * i 3.3.3.3 1562 100 0 ? i 2.2.2.2 0 100 0 ? *> 3.3.3.3/32 0.0.0.0 1562 0 ? * i 2.2.2.2 1562 100 0 ? i 3.3.3.3 0 100 0 ? *> 192.168.1.100/32 0.0.0.0 1562 0 ? * i 3.3.3.3 0 100 0 ? * i 2.2.2.2 1562 100 0 ? *> 202.1.1.0/30 0.0.0.0 0 0 ? * i 2.2.2.2 0 100 0 ? * i 3.3.3.3 3124 100 0 ? *> 202.1.1.4/30 0.0.0.0 0 0 ? * i 3.3.3.3 0 100 0 ? * i 2.2.2.2 3124 100 0 ? *> 202.1.1.8/30 0.0.0.0 3124 0 ? * i 2.2.2.2 0 100 0 ? * i 3.3.3.3 0 100 0 ? [r1-bgp] 调整Local-pre dis bgp routing-table BGP Local router ID is 1.1.1.1 Status codes: * - valid, > - best, d - damped, h - history, i-internal, s -suppressed, S-Stale Origin : i -IGP, e-EGP, ? -incomplete Total Number of Routes: 21 Network NextHop MED LocPrf PrefVal Path/Ogn *> 1.1.1.1/32 0.0.0.0 0 0 ? * i 2.2.2.2 1562 100 0 ? * i 3.3.3.3 1562 100 0 ? *> 2.2.2.2/32 0.0.0.0 1562 0 ? * i 3.3.3.3 1562 100 0 ? i 2.2.2.2 0 100 0 ? *> 3.3.3.3/32 0.0.0.0 1562 0 ? * i 2.2.2.2 1562 100 0 ? i 3.3.3.3 0 100 0 ? *>i 192.168.1.100/32 2.2.2.2 1562 200 0 ? * 0.0.0.0 1562 0 ? * i 3.3.3.3 0 100 0 ? *> 202.1.1.0/30 0.0.0.0 0 0 ? * i 2.2.2.2 0 100 0 ? * i 3.3.3.3 3124 100 0 ? *> 202.1.1.4/30 0.0.0.0 0 0 ? * i 3.3.3.3 0 100 0 ? * i 2.2.2.2 3124 100 0 ? *> 202.1.1.8/30 0.0.0.0 3124 0 ? * i 2.2.2.2 0 100 0 ? * i 3.3.3.3 0 100 0 ? R1路由器略配置命令 [r1]ip ip-prefix loca-pre permit 192.168.1.100 32 [r1]route-policy loca-pre permit node 10 [r1-route-policy]if-match ip-prefix loac-pre [r1-route-policy]apply local-preference 200 [r1]route-policy loca-pre permit node 20 [r1-bgp]peer 2.2.2.2 route-policy loca-pre import

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BGP本地优先属性详解配置

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