[cisco-nas] Re: [c-nsp] NFAS (PRI) on AS5400

[Eric Knudson]

(adding cisco-nas and dropping cisco-nsp)

That doesn't seem right - you should be able to handle new calls with
the backup as soon as the primary drops; shutting the controller
should do it. I believe any connected calls survive(as long as they're
not on the now-dead t1) Can you add a 'show ver' and try running
'debug isdn q931' after dropping the first t1?

Eric



On Mon, 14 Feb 2005 01:07:06 -0500, Dmitry Volkov
<dmitry.volkov at rogers.com> wrote:
> A couple of questions for dial gurus:
> 
> 1) When configure NFAS group, should status of primary and backup D-channels
> look like below:
> 
> 01#sh isdn status serial 6/0:23
> Global ISDN Switchtype = primary-dms100
> ISDN Serial6/0:23 interface
>         dsl 0, interface ISDN Switchtype = primary-dms100
>                 Primary D channel of nfas group 1       <<-----
>     Layer 1 Status:
>         ACTIVE
>     Layer 2 Status:
>         TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED <<---
>     Layer 3 Status:
>         0 Active Layer 3 Call(s)
>     Active dsl 0 CCBs = 0
>     The Free Channel Mask:  0x807FFFFF
>     Number of L2 Discards = 0, L2 Session ID = 6
>     Total Allocated ISDN CCBs = 0
> 
> 01#sh isdn status serial 7/0:23
> Global ISDN Switchtype = primary-dms100
> ISDN Serial7/0:23 interface
>         dsl 8, interface ISDN Switchtype = primary-dms100
>                 Backup D channel of nfas group 1        <<------
>     Layer 1 Status:
>         ACTIVE
>     Layer 2 Status:
>         TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
> <<-----
>     Layer 3 Status:
>         0 Active Layer 3 Call(s)
>     Active dsl 8 CCBs = 0
>     The Free Channel Mask:  0x807FFFFF
>     Number of L2 Discards = 0, L2 Session ID = 1
>     Total Allocated ISDN CCBs = 0
> 01#
> 
> or backup should have status
>       Layer 1 Status:
>           DEACTIVATED
>       Layer 2 Status:
>           TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
> 
> 01#show isdn nfas group 1
> 
>          ISDN NFAS GROUP 1 ENTRIES:
> 
>          The primary D is Serial6/0:23.
>          The backup D is Serial7/0:23.
>          The NFAS member is Serial6/1:23.
>          The NFAS member is Serial7/1:23.
>          The NFAS member is Serial6/2:23.
>          The NFAS member is Serial7/2:23.
>          The NFAS member is Serial6/3:23.
>          The NFAS member is Serial7/3:23.
>          The NFAS member is Serial6/4:23.
>          The NFAS member is Serial7/4:23.
>          The NFAS member is Serial6/5:23.
>          The NFAS member is Serial7/5:23.
> 
>          There are 12 total nfas members.
>          There are 286 total available B channels.
>          The primary D-channel is DSL 0 in state IN SERVICE
>          The backup D-channel is DSL 8 in state STANDBY
>          The current active layer 2 DSL is 0.
> 01#
> controller T1 6/0
>  framing esf
>  linecode b8zs
>  pri-group timeslots 1-24 nfas_d primary nfas_int 0 nfas_group 1
> !
> controller T1 7/0
>  framing esf
>  linecode b8zs
>  pri-group timeslots 1-24 nfas_d backup nfas_int 1 nfas_group 1
> 
> 2) Is it possible to simulate failure somehow ? When I shut cotroller or
> 6/0:23 nothing works at all
> 
> Thanks
> 
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