- 论坛徽章:
- 0
|
这个是一个zebra的linux,接口优先级是100,
成了BDR,
vd13 is up
ifindex 29, MTU 1500 bytes, BW 0 Kbit <UP,BROADCAST,RUNNING,MULTICAST>
Internet Address 10.1.2.2/24, Broadcast 10.1.2.255, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 200.10.10.100, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State Backup, Priority 100
Designated Router (ID) 172.16.0.1, Interface Address 10.1.2.1
Backup Designated Router (ID) 200.10.10.100, Interface Address 10.1.2.2
Multicast group memberships: OSPFAllRouters OSPFDesignatedRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 8.588s
Neighbor Count is 1, Adjacent neighbor count is 1
这是cisco 3550,优先级是15,
cat3550#show ip ospf interface
(connected)
FastEthernet0/23 is up, line protocol is up
Internet Address 10.1.2.1/24, Area 0
Process ID 1, Router ID 172.16.0.1, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 15
Designated Router (ID) 172.16.0.1, Interface address 10.1.2.1
Backup Designated router (ID) 200.10.10.100, Interface address 10.1.2.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:03
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 2, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 200.10.10.100 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
等一下,选举是先选取 BDR 还是先选取DR?
明白了,原来是先选举BDR,这样具有最高优先级的 zebra 系统的接口由于优先级100,成为了BDR,然后在有效路由器当中
选取DR,,,cisco 3550 就成为了 DR,应该可以这么理解吧。
差点把概念问题搞糊涂了。
[ 本帖最后由 kentchoi 于 2009-3-24 17:41 编辑 ] |
|