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Community Member

NFAS on a 2620

Does anyone out there have a config example for NFAS on a 2620? I have 2 PRI's coming in from Telco with a shared D-channel.

Thanks in advance

3 REPLIES
Cisco Employee

Re: NFAS on a 2620

here you go, just make sure telco numbers interfaces the same, you may change switch type. Also this example has ano backup d-channel on the second T1, if you do have a backup d-channel then the T1 with the backup will have nfas_d backup instead of none.

controller T1 1/0

framing esf

linecode b8zs

cablelength short 133

pri-group timeslots 1-24 nfas_d primary nfas_int 0 nfas_group 1

!

!

controller T1 1/1

framing esf

linecode b8zs

cablelength short 133

pri-group timeslots 1-24 nfas_d none nfas_int 1 nfas_group 1

!

interface Serial2/0:23

no ip address

no logging event link-status

isdn switch-type primary-4ess

isdn incoming-voice voice

no cdp enable

Community Member

Re: NFAS on a 2620

What version of IOS are you using on a 2600 for NFAS support? We looked at this last summer and were told we had to go to a 3600 series router for NFAS and there were no plans to support NFAS on the 2600's.

tm

Tim Medley, CCNP+Voice, CCDP, CWNA

Sr. Network Architect

VoIP Group

iReadyWorld

Cisco Employee

Re: NFAS on a 2620

you can run nfas on 2600 starting with 12.1(16) however nfas with d-channel backup is only officially supported on 2651 and 2600 XM platforms with 12.2(11)T and above

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