配置如下：
router2511#sh run
Building configuration...

Current configuration:
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname router2511
!
enable secret 5 $1$k7VA$E8t3jm8mfna/n5EN12ZBR1
enable password tz
!
username ppp password 0 ppp
ip subnet-zero
ip domain-name mytc.edu.cn
ip name-server 210.41.152.10
!
interface Ethernet0
ip address 172.29.17.252 255.255.255.0
no mop enabled
!
interface Serial0
ip address 202.x.x.94 255.255.255.252
bandwidth 64
no keepalive
no fair-queue
!
interface Serial1
no ip address
shutdown
!
router rip
version 2
network 210.41.152.0
network 210.41.153.0
network 210.41.154.0
network 210.41.155.0
network 210.41.156.0
network 210.41.157.0
network 210.41.158.0
network 210.41.159.0
network 202.x.x.0
network 192.168.1.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 202.x.x.93
ip route 172.16.0.0 255.240.0.0 172.29.17.254
ip route 192.168.192.0 255.255.254.0 172.29.17.254
ip route 210.12.168.0 255.255.255.0 172.29.17.254
ip route 210.41.152.0 255.255.248.0 172.29.17.253
tacacs-server host 210.41.152.11
tacacs-server key qiao
!
line con 0
password cisco
login
line 1 16
modem InOut
modem autoconfigure discovery
transport input all
rxspeed 38400
txspeed 38400
flowcontrol hardware
line aux 0
password cisco
login
line vty 0 4
password cisco
login
!
end
问题：
登录此2511不能ping 通202.X.X.94/202.X.X93，原来一直正常.

[ Last edited by feieboy on 2003-5-13 at 09:07 AM ]

问题已经搞定，接moden的出线不通。但是我不明白moden的出线不通时，为什么ping不通2511中s0的ip？

line protocol 没起来

Serial0/1 is up, line protocol is up
我认为当Ser口和远程的连接封装好后,协议起来,方可ok.

Serial0/1 is up, line protocol is up
没有问题。是up壮态

shut no shut 试试，或者是否是线路供应商的线路有问题，