Voice IE: SRST router command bug

From: Radioactive Frog (pbhatkoti@gmail.com)
Date: Wed Dec 26 2007 - 08:59:53 ART


Hi Guys,

I have just noticed during labbing that when SRST kicks in , the " isdn
bind-l3 ccm-manager" command disappear from the ISDN D channel interface.
interface Serial0/2/0:23
description --- ISDN d channel ---
no ip address
encapsulation hdlc
isdn switch-type primary-ni
isdn incoming-voice voice
isdn bind-l3 ccm-manager
isdn bchan-number-order ascending
no cdp enable
end

D controller, logs during sRST
Dec 26 11:25:49.510: %LINK-3-UPDOWN: Interface Serial0/2/1:23, changed state
to up
Dec 26 11:25:49.510: %LINK-3-UPDOWN: Interface Serial0/2/1:0, changed state
to down
Dec 26 11:25:49.510: %LINK-3-UPDOWN: Interface Serial0/2/1:1, changed state
to down
Dec 26 11:25:49.510: %LINK-3-UPDOWN: Interface Serial0/2/1:2, changed state
to down

And noticed that the L3 backhauling command disappread:

interface Serial0/2/0:23
description --- ISDN d channel ---
no ip address
encapsulation hdlc
isdn switch-type primary-ni
isdn incoming-voice voice
isdn bchan-number-order ascending
no cdp enable
end

When I dialed the phone number of HQ site It couldn't went thorugh, here are
the logs:

                Plan:Unknown, Type:Unknown <-----------?????????????????
thats the problem

Dec 26 11:30:29.351: ISDN Se0/2/0:23 Q931: RX <- CALL_PROC pd = 8 callref =
0x8094
        Channel ID i = 0xA98381
                Exclusive, Channel 1
RS1#
Dec 26 11:30:37.359: ISDN Se0/2/1:23 Q931: RX <- DISCONNECT pd = 8 callref
= 0x8094
        Cause i = 0x82E6 - Recovery on timer expiry
Dec 26 11:30:37.363: ISDN Se0/2/1:23 Q931: TX -> RELEASE pd = 8 callref =
0x0094
Dec 26 11:30:37.375: ISDN Se0/2/1:23 Q931: RX <- RELEASE_COMP pd = 8
callref = 0x8094
RS1#

I remember, a copule of time I rebooted the router, removed the controller
interface , re-confiured it and it worked.
This time i rebooted the router, shut/no shut the interface but still srst
phones are not able to call HQ site phones.

Any Idea if this happens to the lab exam, will cisco consider it as a bug?

I upgraded the IOS and that fixed this issue. but the IOS I tested with
won't be in the lab exam.

Any idea if Cisco will still deduct marks if sRST doesn't work due to bugs?
remember their is no workaround, searched all Cisco.com docs.....

Frog



This archive was generated by hypermail 2.1.4 : Tue Jan 01 2008 - 12:04:32 ARST