思科XR BGP邻居组

Question

我在理解Cisco IOS XR中的邻居组方面有问题。我将在下面的例子中说明这一点：

router bgp 10429 
 bfd minimum-interval 300
 !
 neighbor-group IBGP
  remote-as 10429
  address-family ipv4 unicast
   route-policy pass-all in
   route-policy pass-all out
  !
  address-family l2vpn vpls-vpws
   route-policy block-all in
   route-policy block-all out
  !
 !
 neighbor 187.100.0.89
  remote-as 65200
  use neighbor-group IBGP
  description TEST
  address-family ipv4 unicast
 !
!

1. Remote将被邻居组覆盖？

1. 邻居是否因为包含“地址-家庭ipv4单播”行而继承所有传入和传递所有策略？

1. 邻居是否继承“地址-家庭l2vpn vpls”下的策略？

根据我目前的理解：

1. 不是

1. 是

1. 不，因为邻居下面没有“地址-家庭l2vpn vpws”。

Answer 1

以下是我的答案：

1. 不，remote-as值(邻居187.100.0.89)保持不变，为65200。
2. 是的，即使你没有“地址-家庭ipv4单播”。
3. 是的，邻居在“address- l2vpn vpws”下继承策略。

您可以通过使用命令来验证所有答案：

#show bgp neighbors 187.100.0.89 configuration    

  neighbor 187.100.0.89
     remote-as 65200             []
     description TEST            []
     address-family IPv4 Unicast []
      policy pass-all in         [n:IBGP]
      policy pass-all out        [n:IBGP]
     address-family L2VPN VPLS   [n:IBGP]
      policy block-all in        [n:IBGP]
      policy block-all out       [n:IBGP]

#show bgp neighbors 187.100.0.89 inheritance

  Session:      n:IBGP
  IPv4 Unicast: n:IBGP
  L2VPN VPLS:   n:IBGP

#show bgp neighbors  187.100.0.89

  BGP neighbor is 187.100.0.89
  Remote AS 65200, local AS 10429, external link
  Description: TEST
  ...
  For Address Family: IPv4 Unicast
  BGP neighbor version 0
  Update group: 0.1 Filter-group: 0.0  No Refresh request being processed
  Route refresh request: received 0, sent 0
  Policy for incoming advertisements is pass-all
  Policy for outgoing advertisements is pass-all
  ...
  For Address Family: L2VPN VPLS
  BGP neighbor version 0
  Update group: 0.1 Filter-group: 0.0  No Refresh request being processed
  Community attribute sent to this neighbor
  Extended community attribute sent to this neighbor
  Route refresh request: received 0, sent 0
  Policy for incoming advertisements is block-all
  Policy for outgoing advertisements is block-all

我希望这是有用的，并回答你的问题。请检查Cisco文档有关BGP在IOS-XR上的模板继承规则。