From: Flack, Les (les_flack@xxxxxxxxxxx)
Date: Wed Jan 31 2001 - 12:45:47 GMT-3
Justin,
Your description certainly fits the symptoms but unfortunately I've no
conrol over the Switch as its a British Telecom ISDN (Highway service).
Tariq suggested I ask the provider for multi channel subscriber no's but I
tried that today and BT wont play ball. Another suggestion from the group
was to use caller id to screen calls, I havn't tried that yet but I dont
think that will help as both the calling and called routers will use the
same number. Any other suggestions welcome.
regards
Les
----- Original Message -----
From: "Justin Menga" <Justin.Menga@computerland.co.nz>
To: "'Flack, Les'" <LFlack@thrupoint.net>; <ccielab@groupstudy.com>
Sent: Wednesday, January 31, 2001 12:01 PM
Subject: RE: Problem with ISDN when calling between two routers from CH1 to
CH2 on same number.
> Les, I think this has something to do with your ISDN switching in the
middle
> - if you have a single switch in the middle, it looks like the call setup
is
> being routed both back to your 2500 B2 channel (like feedback) and also to
> your 1600. It looks like the 2500 accepts the 'feedback' call first, and
> the circuit is then established between 2500 B1 and 2500 B2. If you have
> control over the ISDN switch then try using unique numbers - addresses
> usually have one major rule - UNIQUENESS
>
> I know it sounds ludicrous but I have many a time configured the wrong
phone
> numbers and got weird crazy stuff like above....
>
> Regards,
>
> Justin Menga CCIE #6640 MCSE+I CCSE
> WAN Specialist
> Computerland New Zealand
> PO Box 3631, Auckland
> DDI: (+64) 9 360 4864 Mobile: (+64) 25 349 599
> mailto: justin.menga@computerland.co.nz
>
>
>
> -----Original Message-----
> From: Flack, Les [mailto:LFlack@thrupoint.net]
> Sent: Wednesday, January 31, 2001 8:06 AM
> To: ccielab@groupstudy.com
> Subject: Problem with ISDN when calling between two routers from CH1 to
> CH2 on same number.
>
>
> Hi all,
>
> I'm having a problem with ISDN when calling between two routers =
> from CH1 to CH2 on the same number. (My isdn line has the same number =
> for both B channels.)
>
> For example:
>
> My 1600 at 12.0(14) calls out of B1 and my 2500 11.3(11a) receives on =
> B2 no problem.
>
> but if I try to make the call from the 2500 to the 1600 the 2500 calls =
> out on B1 AND receives the call on B2. The 1600 does see the call come =
> in on B2 but receives a HOST_DISCONNECT_ACK before it can setup the =
> call.
>
> What am I doing wrong??
>
> regards,
>
> Les
>
> 1600 (r6#)
>
> interface BRI0
> ip address 172.168.65.1 255.255.255.0
> no ip directed-broadcast
> encapsulation ppp
> ip ospf network point-to-point
> no ip mroute-cache
> dialer map ip 172.168.65.2 name r5 broadcast 9583
> dialer-group 1
> isdn switch-type basic-net3
> ppp authentication chap
> ppp chap hostname r6
> ppp chap password 7 1511021F0725
> end
>
> r6#
> 1d05h: ISDN BR0: Incoming call id =3D 0x2E
> 1d05h: ISDN BR0: received HOST_INCOMING_CALL call_id 0x2E
> 1d05h: ISDN BR0: Event: Received a call from <unknown> on B2 at 64 Kb/s
> 1d05h: ISDN BR0: Event: Accepting the call id 0x2E
> 1d05h: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
> 1d05h: %ISDN-6-CONNECT: Interface BRI0:2 is now connected to unknown
> 1d05h: BR0:2 PPP: Treating connection as a callin
> 1d05h: ISDN BR0: received HOST_DISCONNECT_ACK call_id 0x2E
> 1d05h: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
> 1d05h: ISDN BR0: received HOST_DISCONNECT_ACK call_id 0x2E
> r6#
>
> 2500 (r5#)
>
> interface BRI0
> ip address 172.168.65.2 255.255.255.0
> no ip directed-broadcast
> encapsulation ppp
> no ip mroute-cache
> dialer map ip 172.168.65.1 name r6 broadcast 9583
> dialer-group 1
> ppp authentication chap
> ppp chap hostname r5
> ppp chap password 7 045802150C2E=20
>
> r5#
> 1d05h: ISDN BR0: Outgoing call id =3D 0x801E
> 1d05h: ISDN BR0: Event: Call id 0x801E to 9583 at 64 Kb/s
> 1d05h: ISDN BR0: received HOST_INFORMATION call_id 0x801E
> 1d05h: ISDN BR0: Incoming call id =3D 0x66
> 1d05h: ISDN Event: dsl 0 call_id 0x801E B channel assigned by switch 0
> ISDN BR0: received HOST_INCOMING_CALL call_id 0x66
> 1d05h: ISDN BR0: llc valid, speed 64, call type is Sync
> speed:-1 async:Y
> 1d05h: ISDN BR0: Event: Received a call from <unknown> on B2 at 64 Kb/s
> 1d05h: ISDN BR0: Event: Accepting the call id =3D 0x66
> 1d05h: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
> 1d05h: ISDN BR0: received HOST_ALERTING call_id 0x801E
> 1d05h: ISDN BR0: received HOST_CONNECT call_id 0x801E
> 1d05h: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
> 1d05h: ISDN BR0: Event: Connected to 9583 on B1 at 64 Kb/s
> r5#
> 1d05h: %ISDN-6-CONNECT: Interface BRI0:2 is now connected to unknown
> 1d05h: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 9583
> r5# =20
>
> ---------------------------------------End-------------------------------=
> ------------
>
>
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