Dial in router configuration problem or routing problem?

[caiyan]

Hi

I have a 1721(with a wic-1am card) as my dial in access server. I can dial in successfully using Windows 2000 and ping the Ethernet interface IP of 1721.But I cannot ping the IP of another router A which connected to the access server 1721 through Ethernet, and also cannot ping the IP of the third router B which connected to A through DDN leased line. I used ospf as the routing protocal in these three routers, all routers can access each other normally. So what's the problem with my network? Thanks in advance.

[makchitale]

Do you have the "redistribute connected subnets" command configured?

router ospf x

redistribute connected subnets

Thanks, Mak

[caiyan]

Thank you,Mak

Ok, I have added the command" redistribute connected subnets", now I can ping router A successfully but B remains unreachable. Should I add this command to all routers?

Thanks for your help.

[makchitale]

No we do not need to configure RouterA & RouterB with the “redistribute connected subnets”; if your routing is setup correctly the dialup client & Router B should be able to communicate.

Is the routerB configured as stub or NSSA or filtering? The running configs will be helpful.

Thanks, Mak

[caiyan]

Ok,

Running conifiguration of Router B:

RouterB#sh run

Building configuration...

Current configuration : 5963 bytes

!

version 12.2

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname RouterB

!

enable secret 5 $1$3gBr$w.8Ogyn7i7M.Sbc704z4//

!

ip subnet-zero

ip cef

!

!

no ip domain lookup

!

!

!

!

!

interface Loopback0

ip address 199.0.100.1 255.255.255.255

!

interface FastEthernet0/0

ip address 199.0.145.252 255.255.255.0

duplex auto

speed auto

standby 2 ip 199.0.145.254

standby 2 preempt

!

interface Serial0/0

description DDN connected to RouterA

ip address 199.0.101.17 255.255.255.252

no fair-queue

!

router ospf 10

log-adjacency-changes

network 199.0.101.16 0.0.0.3 area 0

network 199.0.145.0 0.0.0.255 area 0

ip classless

ip http server

!

!

!

line con 0

line aux 0

modem InOut

modem autoconfigure discovery

speed 300

line vty 0 4

password cisco

login

!

!

end

[caiyan]

Running Configuration of Router A

RouterA#sh run

Building configuration...

Current configuration : 3231 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname RouterA

!

enable secret 5 $1$KdJw$SSvbuxhO8jlww0hK1A6qe1

!

ip subnet-zero

!

!

!

!

!

interface Loopback0

interface Ethernet0

no ip address

shutdown

half-duplex

!

interface FastEthernet0

ip address 199.0.3.252 255.255.255.0

speed auto

standby 1 ip 199.0.3.254

standby 1 preempt

!

interface Serial0

Description DDN connected to RouterB

ip address 199.0.101.18 255.255.255.252

no fair-queue

!

router ospf 10

log-adjacency-changes

network 199.0.3.0 0.0.0.255 area 0

network 199.0.101.16 0.0.0.3 area 0

!

ip classless

!

line con 0

line aux 0

line vty 0 4

password cisco

login

!

end

[caiyan]

running configuration of dialin router 1721

Cisco1721#sh run

Building configuration...

Current configuration : 1091 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname cisco1721

!

enable secret 5 $1$NJuF$5jEUbnKSRn1/bTtYpPbRX/

enable password cisco

!

username Manager password 0 cisco

ip subnet-zero

!

!

!

!

!

interface FastEthernet0

ip address 199.0.3.253 255.255.255.0

speed auto

half-duplex

no cdp enable

standby 1 ip 199.0.3.254

standby 1 priority 50

standby 1 preempt

!

interface Async1

ip unnumbered FastEthernet0

encapsulation ppp

dialer in-band

dialer idle-timeout 300

dialer-group 1

async default routing

async mode dedicated

peer default ip address pool default

ppp authentication chap pap ms-chap

!

router ospf 10

log-adjacency-changes

redistribute connected subnets

network 199.0.3.0 0.0.0.255 area 0

!

ip local pool default 199.0.3.100 199.0.3.110

ip classless

no ip http server

!

!

dialer-list 1 protocol ip permit

no cdp run

!

line con 0

line 1

modem InOut

modem autoconfigure discovery

stopbits 1

speed 115200

flowcontrol hardware

line aux 0

line vty 0 4

password cisco

login

!

end

[makchitale]

1- Can the client ping 199.0.101.18 (serial ip on the RtrA)

2- sh ip ospf neigh (from all the routers)

3- sh ip route (from all the routers)

4- sh ip ospf da ex (from all the routers)

5- If the forwarding address in the output of "sh ip ospf da ex" is non-zero then send "sh ip route " from all the routers.

Thanks, Mak