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New Member

ISDN Issue with Cisco 1841 Router

I am using cisco 1841 rouetr with 2 WIC-1B-S/T-V3 cards as the central router ,the configuration is such that only central router can dial to the client location router using ISDN connectivity .

Issue is we are switching off the router daily evening ,while switching on the router the ISDN line is not activated ,the layer 1 is coming up only if I dial to the central location ISDN number from a land phone .

At the service provider side they are having seimens ISDN switch , the NT unit used is MROTECK NT1.

so how to activate the layer 1 of the bri interface active automatically

  • WAN Routing and Switching
8 REPLIES
Bronze

Re: ISDN Issue with Cisco 1841 Router

Just to make sure that i understood your case.

When the router switch ON, and you issue show isdn status command, Layer1 deactivated, right?

It will be UP only if you place an analog phone at the analog ports at the ISDN NT, or i think if you issue "clear interface bri 0/0/0" it will be activated and UP. I think this problem related to your ISP, either setting the ISDN switch type, or (I recommend this) that the ISDN NT type.

Could you please change the NT and try again?!

I'm waiting your update!

Regards

Abd Alqader

New Member

Re: ISDN Issue with Cisco 1841 Router

I tried by giving the command clear interface bri and by changing the NT unit also but stillthe same status ,layer 1 is deactivated

ISDN switch type specified is basic net 3

waiting for your reply

thanks and regards

Retheesh

Re: ISDN Issue with Cisco 1841 Router

hi

can you post out the config pertaining to the ISDN bri interface & connectivity..

regds

New Member

Re: ISDN Issue with Cisco 1841 Router

Please find configuration for the router

!

interface BRI0/0/0

no ip address

encapsulation ppp

dialer pool-member 1

dialer pool-member 7

dialer pool-member 6

dialer pool-member 5

dialer pool-member 2

dialer pool-member 3

dialer pool-member 4

isdn switch-type basic-net3

isdn point-to-point-setup

no cdp enable

ppp multilink

!

interface BRI0/1/0

no ip address

encapsulation ppp

dialer pool-member 1

dialer pool-member 7

dialer pool-member 6

dialer pool-member 5

dialer pool-member 2

dialer pool-member 3

dialer pool-member 4

isdn switch-type basic-net3

isdn point-to-point-setup

no cdp enable

ppp multilink

!

interface Dialer1

description venalla

ip address 10.0.250.9 255.255.255.252

encapsulation ppp

dialer pool 1

dialer idle-timeout 180

dialer fast-idle 10

dialer string 2807467

dialer-group 1

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer2

description cable

ip address 10.0.250.13 255.255.255.252

encapsulation ppp

dialer pool 2

dialer idle-timeout 180

dialer fast-idle 10

dialer string 04222656785

dialer-group 1

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer3

description emw

ip address 10.0.250.17 255.255.255.252

encapsulation ppp

dialer pool 3

dialer idle-timeout 180

dialer fast-idle 10

dialer string 04222573808

dialer-group 1

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer4

description coimbatore

ip address 10.0.250.21 255.255.255.252

encapsulation ppp

dialer pool 4

dialer idle-timeout 180

dialer fast-idle 10

dialer string 04222430751

dialer-group 1

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer5

description godown

ip address 10.0.250.25 255.255.255.252

encapsulation ppp

dialer pool 5

dialer idle-timeout 180

dialer fast-idle 10

dialer string 08025608455

dialer-group 1

no peer default ip address

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer6

description bangalore

ip address 10.0.250.29 255.255.255.252

encapsulation ppp

dialer pool 6

dialer idle-timeout 180

dialer fast-idle 10

dialer string 08025218810

dialer-group 1

no cdp enable

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

!

interface Dialer7

description hyderbad

ip address 10.0.250.33 255.255.255.252

encapsulation ppp

dialer pool 7

dialer idle-timeout 180

dialer fast-idle 10

dialer string 04024222441

dialer load-threshold 4 either

dialer-group 1

no cdp enable

ppp authentication pap

ppp pap sent-username head password 0 cisco

ppp multilink

please reply asap

Bronze

Re: ISDN Issue with Cisco 1841 Router

Why you are using that number of dialer-pools?

use as example dialer-pool 1 and use it in all the interfaces.

!

interface BRI0/0/0

no ip address

encapsulation ppp

dialer pool-member 1

isdn switch-type basic-net3

isdn point-to-point-setup

no cdp enable

ppp multilink

!

!

interface BRI0/1/0

no ip address

encapsulation ppp

dialer pool-member 2

isdn switch-type basic-net3

isdn point-to-point-setup

no cdp enable

ppp multilink

!

And at the dialer interfaces you can assign either the interface use bri 0/0/0 or bri 0/1/0

But i think your problem is at the physical or layer2. Since once you are use the analog line at the NT, the line gets UP!

Abd Alqader

New Member

Re: ISDN Issue with Cisco 1841 Router

it is not the dialer pool which is creating the problem

Bronze

Re: ISDN Issue with Cisco 1841 Router

Hi,

I know, as i told you before, it is either physical connectivity or layer2 (communication between the card and the ISDN switch).

Regards

Abd Alqader

New Member

Re: ISDN Issue with Cisco 1841 Router

Physical connectivity was checked ,status was ok,

the bri module used is WIC B S/T1-V3 whether any configuration is required to automatically make the layer 1 active

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