Installed a VWIC2-2MFT-T1/E1 but don't see new Serial interfaces in sh run

[Difan Zhao]

I reinstalled the card in WIC slot 1 in a 2821 router (it had a VWIC-2MFT-T1 in slot 0) and I did configure "card type t1 0 1" in the router.

Now I can see the new controllers in show run but not new serial interfaces:

controller T1 0/1/0

framing esf

linecode b8zs

!

controller T1 0/1/1

framing esf

linecode b8zs

I don't know if it's normal because there is no cables plugged in the card yet. So the controllers are "down"...

The two T1 ports will be used to double the internet bandwidth (the old T1 card has two T1 internet connection already). Here is the config of the old T1 card:

controller T1 0/0/0

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 0/0/1

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24

!

Can anybody please tell me what "channel-group 0 timeslots 1-24" means here...? Do I need to put the same configuration under the two new controllers or I should use channel-group 1? Is this the information I should get from the ISP? Will the serial interfaces get shown in the show run after I plug the cables in and configure the channel-group? Thanks!

[Edison Ortiz]

channel-group will allocated the T1 channels to an interface hence creating the serial interface mapping. That's the piece you are missing, go ahead and enter those commands.

__

Edison.

[Difan Zhao]

Thanks for reply! But should I use "channel-group 0" as well? What does the number 0 mean here? Can I use a different number? Thanks!

[Edison Ortiz · Accepted solution]

The number will be appended to the serial number from the controller card.

For instance, you have a controller card denoted as:

controller T1 0/1/0

If you use channel-group 0, the serial interface will be

interface serial 0/1/0:0

If you use channel-group 1, the serial interface will be

interface serial 0/1/0:1

etc...

HTH,

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[Difan Zhao]

I see!! But does it matter if I use a different number? Can I use channel-group 1? Do I need to use same channel-group number for the two T1 controllers on the same card? Thanks!

[Edison Ortiz]

You can use 0 or 1 on both or either controller. It's your call.

__

Edison.