[RTC] Bgp1002 

Preference 20 170 200 

Peer RTA as-number 1001 

Peer RTD as-number 1002 

Peer RTA route-policy setmed import 

route-policy setmed permit node 10 

apply cost 100 

[RTD] Bgp 1002 

Preference 20 170 200 

Peer RTB as-number 1001 

Peer RTC as-number 1002 

Peer RTA route-policy setmed import 

route-policy setmed permit node 10 

apply cost 200（含图） 

Routing Process OSPFv3(1) with ID 1.1.1.1

  Graceful restart helper enabled

  Graceful restart helper strict-lsa-checking disabled

  SPF schedule delay 5 secs, Hold time between SPFs 10 secs

  Minimum LSA interval 5 secs, Minimum LSA arrival 1 secs

  Number of external LSA 0. These external LSAs checksum Sum 0x0000

  Number of AS-Scoped Unknown LSA 0

  Number of LSA originated 19

  Number of LSA received 0

  Number of areas in this router is 3

  Area BACKBONE(0)

    Number of interfaces in this area is 2

    SPF algorithm executed 9 times

    Number of LSA 3. These LSAs checksum Sum 0x6C29

    Number of Unknown LSA 0

  Area 0.0.0.1

    Number of interfaces in this area is 1

    SPF algorithm executed 12 times

    Number of LSA 3. These LSAs checksum Sum 0x22F1E

    Number of Unknown LSA 0

  Area 0.0.0.10

    Number of interfaces in this area is 1

    SPF algorithm executed 1 times

    Number of LSA 3. These LSAs checksum Sum 0x81E2

    Number of Unknown LSA 0

那么该路由器共有 个接口处于该OSPFv3进程内

OSPFv3 Router with ID (2.2.2.2) (Process 1)  

*Destination: 1:1/128           Type: IA  Cost: 1562  NextHop: FE80::11    Interface: Tun1  

*Destination: 2:2/128           Type: I   Cost: 0     NextHop: Direct      Interface: Loop0  

*Destination: 3:3/128           Type: IA  Cost: 1562  NextHop: FE80::3     Interface: Tun3  

*Destination: 2009:1::/64       Type: IA  Cost: 1563  NextHop: FE80::1     Interface: Vlan1  

*Destination: 2009:2::/64       Type: IA  Cost: 1563  NextHop: FE80::1     Interface: Tun1  

*Destination: 2009:2::/64       Type: I   Cost: 1     NextHop: Direct      Interface: Vlan1  

*Destination: 2009:3::/64       Type: IA  Cost: 1563  NextHop: FE80::3     Interface: Tun3  

ip route-static 0.0.0.0 0.0.0.0 s1/0，RTB上配 置了静态路由

ip route-static 10.0.0.0 23 s1/0。则在何种情况下，RTA与RTB间会产生路 由环路？（含图）

[RTA-GigabitEthernet0/0] ip address 192.168.2.1 255.255.255.0 

[RTA-GigabitEthernet0/0] ospf network-tpe p2p 

[RTA] ospf 1router-id 1.1.1.1 

[RTA-ospf-1] area 1 

[RTA-ospf-1-area-0.0.0.1] network 192.168.2.0 0.0.0.255 

[RTB-GigabitEthernet0/0] ip address 192.168.2.2 255.255.255.0 

[RTB-GigabitEthernet0/0] ospf network-tpe p2p 

[RTB-GigabitEthernet0/1] ip address 192.168.3.1 255.255.255.0 

[RTB-GigabitEthernet0/1] ospf network-tpe p2p 

[RTB] ospf 1 router-id 2.2.2.2 

[RTB-ospf-1] area 1 

[RTB-ospf-1-area-0.0.0.1] network 192.168.2.0 0.0.0.255 

[RTB-ospf-1] area 0

[RTB-ospf-1-area-0.0.0.0] network 192.168.3.0 0.0.0.255 

[RTC-GigabitEthernet0/0] ip address 192.168.3.2 255.255.255.0 

[RTC-GigabitEthernet0/0] ospf network-tpe p2p 

[RTC] ospf 1 router-id 3.3.3.3 

[RTC-ospf-1] area 0 

[RTC-ospf-1-area-0.0.0.0] network 192.168.3.0 0.0.0.255 那么在RTB在OSPF区域内产生的LSA类型有  （含图）

<RTA>display isis brief 

ISIS (1) Protocol Brief Information : 

Network-entity: 01.1111.1111.1111.00 

Is-level :level-1-2 

cost-ste: narrow 

preference : 15 

Lsp-length receive : 1497 

Lsp-length originate : level-1 1476

Level-2 1476 maximumimportedroutes number:10000Timers: 

Lsp-max-age: 1200 

Lsp-refresh: 900 Interval between SPFs: 10  

从以上信息可以知道RTA

<RTC>display isis lsdb level-2 verbose 

从以上信息可以知道（含图）

 同时在该 主机上配置如下命令：

Bgp 65400 

Network 172.16.0.0 

Network 192.168.1.0 

Network 10.0.0.0 

根据以上信息，在该主机的BGP路由器表中，应该有以下几点哪些BGP语音：（含图）

RouteFlags:A-Aging,S-Suppressed,G-Garbage-collect（含图）