学员提问：
华为路由型号AR18-12 ，思科路由型号1721，两路由间使用铁通光缆用V35协转互联，连接后两路由间S0、S1口可以PING通，但E0口互相PING不通，不知是什么原因，各位帮忙查看一下思科路由配置有没有问题，原华为路由配置不想改动，因为还连接其它路由。
华为AR18-12配置如下：
[baicun]dis cur
Now create configuration...
Current configuration
!
version 1.74
local-user admin service-type administrator password cipher /P.G'J<G@HG-JEXJ
Q<%DJQ!!
sysname baicun
router id 192.165.2.2
undo pos-server addr-switch
firewall enable
aaa-enable
aaa accounting-scheme optional
!
interface Aux0
async mode flow
flow-control none
link-protocol ppp
!
interface Ethernet0
ip address 10.10.23.1 255.255.255.0
ospf enable area 0.0.0.2
ospf network-type p2p
!
interface Serial0
clock DTECLK1
link-protocol hdlc
ip address 192.165.2.2 255.255.255.0
ospf enable area 0.0.0.2
ospf peer 192.165.2.1
ospf network-type p2p
!
interface Serial1
clock DTECLK1
link-protocol hdlc
ip address 192.165.3.1 255.255.255.0
ospf enable area 0.0.0.2
ospf peer 192.165.3.2
ospf network-type p2p
!
quit
ospf enable
!
quit
!
return
思科1721路由配置如下：
hc#sh star
Using 1012 out of 29688 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname hc
!
enable secret 5 $1$iTQX$UMKbWZdzCoqxC52Wez.UC/
!
ip subnet-zero
!
!
!
!
!
interface FastEthernet0
ip address 10.10.22.1 255.255.255.0
speed auto
!
interface Serial0
ip address 192.165.1.2 255.255.255.0
ip ospf network non-broadcast
no fair-queue
!
interface Serial1
ip address 192.165.2.1 255.255.255.0
ip ospf network non-broadcast
!
interface Serial2
no ip address
shutdown
!
interface Serial3
no ip address
shutdown
!
router ospf 100
log-adjacency-changes
network 10.10.22.0 0.0.0.255 area 2
network 192.165.1.0 0.0.0.255 area 2
network 192.165.2.0 0.0.0.255 area 2
neighbor 192.165.2.2
neighbor 192.165.1.1
!
ip classless
no ip http server
!
!
!
line con 0
line aux 0
line vty 0 4
password 1720
login
!
no scheduler allocate
end
两路由连接后广域网S0 、S1口可通，但E0口互相PING不通
捷盈讲师及学员解答：