H3C交换机互联路由从静态改为动态

1.网络拓扑

2.现状

  路由器与核心交换机为BGP互联，核心交换机与汇聚交换机为静态路由互联

1）路由器当前配置 

isis 1
 cost-style wide
 set-att never
 ignore-att
 network-entity 03.0100.0320.8255.00

interface LoopBack0
 ip address 10.3.208.255 255.255.255.255
 isis enable 1
interface GigabitEthernet0/3
 port link-mode route
 ip address 10.3.210.1 255.255.255.252
 isis enable 1 
 isis circuit-type p2p

bgp 65003
 group core internal
 peer core connect-interface LoopBack0
 peer core password cipher $c$3$sYDsvTPylfCDtz4ZswhVrWm7xGu/c3uifUq/Qv3x5Ic= peer 10.3.208.1 group core
 #
 address-family ipv4 unicast
  preference 20 200 200
  aggregate 10.3.0.0 255.255.0.0
  peer core enable
  peer core default-route-advertise
  peer core next-hop-local

2）核心交换机当前配置

isis 1
 cost-style wide
 set-att never
 ignore-att
 network-entity 03.0100.0320.8001.00

interface LoopBack0
 ip address 10.3.208.1 255.255.255.255
 isis enable 1
interface GigabitEthernet2/0/19
 port link-mode route
 description to_RT
 ip address 10.3.210.2 255.255.255.252
 isis enable 1
 isis circuit-type p2p

bgp 65003
 router-id 10.3.208.1 peer 10.3.208.255 as-number 65003
 peer 10.3.208.255 connect-interface LoopBack0
 peer 10.3.208.255 password cipher $c$3$h3AgA9cG9rkMiCm78jWiUvILrsNG3WxSBSbeFbwDMvI= #
 address-family ipv4 unicast
  preference 20 200 200  network 10.3.5.0 255.255.255.0
  network 10.3.6.0 255.255.255.0
  network 10.3.209.0 255.255.255.252
  network 10.3.211.0 255.255.255.248
  network 10.3.212.0 255.255.255.252  
  peer 10.3.208.255 enable
  peer 10.3.208.255 reflect-client

静态回指：
ip route-static 10.3.5.0 24 10.3.212.2

3）汇聚交换机当前配置

ip route-static 0.0.0.0 0 10.3.212.1

3.变更核心和汇聚的互联为ISIS加BGP

1）核心交换机配置

interface Vlan-interface312
 description To_5#
 ip address 10.3.212.1 255.255.255.252
 isis enable 1
 isis circuit-type p2p

bgp 65003
 router-id 10.3.208.1
 peer 10.3.208.51 as-number 65003
 peer 10.3.208.51 connect-interface LoopBack0
 peer 10.3.208.51 password cipher $c$3$565hZ1Wl3KMTRNTshYzX63UMgC8b3jLEGDd3a5jzum0=

  删除核心上的BGP宣告网段，不然会优选本地network而不选从汇聚IBGP获取的。

  使核心上的IBGP路由高于静态回指路由：修改静态路由的preference大于200。动态路由测试成功后可将静态路由删除。

2）汇聚交换机配置

isis 1
 cost-style wide
 set-att never
 ignore-att
 network-entity 03.0100.0320.8051.00

interface LoopBack0
 ip address 10.3.208.51 255.255.255.255
 isis enable 1
int vlan 312
 description to_core
 ip address 10.3.212.2 255.255.255.252
 isis enable 1
 isis circuit-type p2p

bgp 65003
 router-id 10.3.208.51
 group core internal
 peer core connect-interface LoopBack0
 peer core password cipher $c$3$OAX8o1gAOJ6IWWHDPc1HcWil6q+cMJKWdrO2lFQfmrE=
 peer 10.1.208.1 as-number 65001
 peer 10.3.208.1 group core
 peer 10.1.208.1 as-number 65001(华为需配，H3C配上不报错，但是也不在dis cu里显示) 
 address-family ipv4 unicast
  preference 20 200 200
  network 10.3.5.0 255.255.255.0
  peer core enable
  peer 10.3.208.1 group core(华为需配，H3C配上不报错，但是也不在dis cu里显示)