Need help with point-to-point circuits

[dearingkr]

I have a main campus with 5 remote sites connected via WAN circuits.

Host router is a Cisco 2691
IOS is 12.2(15)-T9

Serial 0/0 is a T1 CSU/CSU card used for frame-relay to 3 of the remote sites, these work fine.

Serial 0/1 is a spare T1 CSU/DSU card.

Also have a network module in slot 1, a NM-1CT1-CSU channelized to create 2 serial ports.

All remote site have a Cisco 1721 or 1751 with T1 CSU card.


The 2 sites I'm having problems with have 256k point-to-point circuits coming into a single T1 (thus the need for the network module).
I can't get these circuits up using this card!

I know the circuit is good because...
If I move the T1 line over to the spare T1 CSU card and set it to the specific timeslots, I can get either site working just fine, but only one at a time.


HOST ROUTER CONFIG
!
controller T1 1/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-4
channel-group 1 timeslots 5-8
!
interface Serial1/0:0
ip address 10.10.215.1 255.255.255.0
!
interface Serial1/0:1
ip address 10.10.214.1 255.255.255.0


REMOTE A
!
interface Serial0
ip address 10.10.215.2 255.255.255.252
no fair-queue
service-module t1 timeslots 1-4


REMOTE B
!
interface Serial0
ip address 10.10.214.2 255.255.255.252
no fair-queue
service-module t1 timeslots 1-4


I can get either one of the links to come up just fine using the spare T1 WIC

interface Serial0/0
ip address 10.10.215.1 255.255.255.0
service-module t1 timeslots 1-4

OR

interface Serial0/1
ip address 10.10.214.1 255.255.255.0
service-module t1 timeslots 5-8



I'm probably missing something simple.

Any help would be appreciated

 

[camusa]

It looks as if you have given both remote sites the same time slots.

Hope this helps.

Chris

 

[dearingkr]

According to the ISP, the remote ends of the circuits use the first 4 channels of the T1.

 

[dearingkr]

I found the problem.

The following lines:
channel-group 0 timeslots 1-4
channel-group 1 timeslots 5-8

should be:
channel-group 0 timeslots 1-4 speed 64
channel-group 1 timeslots 5-8 speed 64

You have to configure the controller for the speed of the DSO's

MCSE CCNA CCDA

 

[IllegalOperation]

Dearingkr, its not that you have to specify the speed of the controller - it is because the default on a NM-1CT1-CSU is 56 (instead of 64).

In the future when troubleshooting a problem such as this, do a show interface command and it will tell you the line speed it is set at....

 

[Sarge]

Yes you do need to specify the speed

Joe Olivier
colliergov.net