Cisco 3620/3640 2-T1 multilink for 3meg config help 1

[john223]

Hi, and thanks in advance for guidance in getting this config to work.

I'm working on setting up a 2-T1 config between a 3640 and 3620, using NM-2CT1-CSU modules at both ends. I have the t1 controllers config'd w/ B8ZS and ESF and have channel-group as 1-24 speed 64.

I don't seem to be able to config the T1's to function in the multilink group 1.

I'm working from a WORKING multilink config (printout) in a 2600 series router (w/ 3 t1's in the multilink group).... I notice that the 2600 is using serial WIC's... which I don't have in the 3620/3640 routers. Is it possible that multilink doesn't work w/ NM-2CT1-CSU modules?

My IOS is 12.3(5a) in the 3620, which is currently the config I'm wrangling with.

Any and all feedback is appreciated. Thanks !

 

[KiscoKid]

Have you got it configured something like as follows:

controller T1 1/0
framing esf
linecode b8zs
channel-group 1 timeslots 1-24 speed 64

controller T1 1/1
framing esf
linecode b8zs
channel-group 1 timeslots 1-24 speed 64

interface Serial1/0:1
ppp multilink
ppp multilink group 1

interface Serial1/1:1
ppp multilink
ppp multilink group 1

interface multilink 1
ip address a.b.c.d 255.255.255.0
ppp multilink fragment delay 20
ppp multilink interleave
ppp multilink multiclass

 

[john223]

KiscoKid, thanks for your email...

"Yes", to the controller statements... with regard to the last 3 config 'paragraphs' I didn't have it that way... but I will certainly give it a whirl, probably at the 1st of the week, and keep you posted as to the result.

Thanks for you help!