You have default routes pointed towards one another. You ping an address
that doesn't exist on either router. The first sends it off to the second.
The second doesn't know what to do with it so sends it on to its default
which is the first.
Try doing a no keepalive on some of your unused FastE interfaces and give
them an ip address. Or create additional loopback interfaces. Use a default
route on one router and add statics on the other to the far end's Loopbacks.
It should then work as desired. 

> -----Original Message-----
> From: Pierre-Alex Guanel [mailto:[EMAIL PROTECTED]]
> Sent: Friday, June 14, 2002 12:19 PM
> To: [EMAIL PROTECTED]
> Subject: RE: ISDN -- challenge! [7:46496]
> 
> 
> No I am not running any routing protocol!
> 
> Here are my configs:
> 
> isdn1 (router A)
> 
> isdn1#show run
> Building configuration...
> 
> Current configuration : 1166 bytes
> !
> version 12.2
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname isdn1
> !
> enable secret 5 $1$9PdI$e3RshbiT8O9CiQxW317VQ0
> !
> username isdn2 password 0 cisco
> username isdn3 password 0 cisco
> ip subnet-zero
> !
> !
> no ip domain-lookup
> ip host isdn2 2065 1.1.1.1
> !
> isdn switch-type basic-ni
> !
> !
> !
> interface Loopback0
>  ip address 1.1.1.1 255.255.255.255
> !
> interface FastEthernet0/0
>  no ip address
>  shutdown
>  duplex auto
>  speed auto
> !
> interface Serial0/0
>  no ip address
>  shutdown
>  no fair-queue
> !
> interface BRI0/0
>  ip address 172.16.1.1 255.255.255.0
>  encapsulation ppp
>  dialer map ip 172.16.1.2 broadcast 5554000
>  dialer-group 1
>  isdn switch-type basic-ni
>  isdn spid1 51055512340001
>  isdn spid2 51055512350001
>  ppp authentication chap
> !
> interface FastEthernet0/1
>  no ip address
>  shutdown
>  duplex auto
>  speed auto
> !
> interface Serial0/1
>  no ip address
>  shutdown
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 172.16.1.2
> ip http server
> ip pim bidir-enable
> !
> dialer-list 1 protocol ip permit
> !
> line con 0
>  escape-character 19
> line aux 0
>  no exec
>  transport input all
> line vty 0 4
>  password san-fran
>  login
> !
> no scheduler allocate
> end
> 
> --------------------------------------------------------
> 
> isdn 2 (Router B)
> 
> isdn2#show run
> Building configuration...
> 
> Current configuration : 1115 bytes
> !
> version 12.2
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname isdn2
> !
> logging rate-limit console 1
> enable secret 5 $1$8Z95$B21CJMn0N8R9EqeGB8olj1
> !
> username isdn1 password 0 cisco
> ip subnet-zero
> !
> !
> no ip domain-lookup
> ip host switch 2065 1.1.1.1
> !
> isdn switch-type basic-ni
> !
> !
> !
> interface Loopback0
>  ip address 1.1.1.1 255.255.255.255
> !
> interface FastEthernet0/0
>  no ip address
>  shutdown
>  duplex auto
>  speed auto
> !
> interface BRI0/0
>  ip address 172.16.1.2 255.255.255.0
>  encapsulation ppp
>  dialer map ip 172.16.1.1 broadcast 5551234
>  dialer-group 1
>  isdn switch-type basic-ni
>  isdn spid1 51055540000001
>  isdn spid2 51055540010001
>  ppp authentication chap
> !
> interface FastEthernet0/1
>  no ip address
>  shutdown
>  duplex auto
>  speed auto
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 172.16.1.1
> no ip http server
> ip pim bidir-enable
> !
> access-list 1 permit any
> dialer-list 1 protocol ip list 1
> !
> line con 0
>  escape-character 18
> line aux 0
>  no exec
>  transport input all
> line vty 0 4
>  password san-fran
>  login
> !
> no scheduler allocate
> end




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=46617&t=46496
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