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TOPIC: ISDN link establishment failure

ISDN link establishment failure 10 years 2 months ago #15685

  • BiT
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I am using a NetSim to practice on ISDN. I tried to set up an ISDN link between two routers each with a 2B+D interface. The problem is there is no ping. I have posted here the configuration of each one:

Router1:
[code:1]<output omitted>
!
interface Bri0
ip address 172.16.2.1 255.255.0.0
no ip directed-broadcast
dialer string 7782002
dialer-group 1
isdn switch-type basic-ni
!
!
ip classless
no ip http server
access-list 101 permit icmp any any
!
dialer-list 1 protocol ip permit
dialer-list 1 protocol ip deny
dialer-list 1 protocol ip deny
dialer-list 1 protocol ip deny
dialer-list 1 protocol ip permit
!
isdn switch-type basic-ni

<output omitted>[/code:1]


Router2:
[code:1]
<output omitted>
!
interface Bri0
ip address 172.16.2.2 255.255.0.0
no ip directed-broadcast
dialer string 7782001
dialer-group 1
isdn switch-type basic-ni
!
!
ip classless
no ip http server
access-list 101 permit icmp any any
!
dialer-list 1 protocol ip permit
dialer-list 1 protocol ip deny
!
isdn switch-type basic-ni

<output omitted>[/code:1]
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Re: ISDN link establishment failure 10 years 1 month ago #16361

  • taqqi14
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does the Bri channels of both routers come up?ping cant b successfull if they cant be connected to each other..Send the output of "Sh int bri0" on both routers ,which will show channels up if they r connected.

Taqqi14
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ISDN link establishment failure 10 years 1 month ago #16371

  • vk
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Hi BiT,
Taqqi14 is right first we need to chk does the Bri channels of both routers come up?

In your config there is no use of an access-list as you are not mapping access-list with dialer-list.

but I think this shuld not affact the pinging as u define dialer-list 1 protocol ip permit. :?

Please correct me if I am wrong....... :oops:

Regards
Kunal
If there is a WILL,There is a WAY.
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Re: ISDN link establishment failure 10 years 1 month ago #16389

  • Dove
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I am using the Boson Netsim in this I also tried to configure the ISDN but its vain....


The status of port and everything show up and normal as the mentioned in the CCNA book....still I couldn't ping the remote ip.


looking for your suggestions on this.


Rgds,
Dove

Dove
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ISDN link establishment failure 10 years 1 month ago #16414

  • vk
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Hi all ,
In BiT's ISDN configration I found that SPID is not assign on bri0 interface. :?:


As you said you are doing this on simulator, when you design the lab it gives you switch type , spid and dialer string number which you shoud assign on bri interface when you config isdn.

In actual life this numbers and switch type are provided by ISP and we should add this in config.

Your setup should work after assign spid on both routers.
Let me know if it will get resold!!!!!

Dove I think your config is same as BiT
In your setup chk 'sh isdn status'
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Re: ISDN link establishment failure 10 years 1 month ago #16429

  • Chris
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Bit,

Is it possible to post the full configuration of both routers to help us troubleshoot the problem?

Also, you can try removing all "dialer-list 1 protocol ip deny " to ensure no redundant code is left in the configuration.

Cheers,
Chris Partsenidis.
Founder & Editor-in-Chief
www.Firewall.cx
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