From: Dhanaseker Kandhasamy (dkandhas@xxxxxxxxx)
Date: Thu Jan 18 2001 - 04:38:32 GMT-3
Find out the vpi/vci number using ilmi-pvc-discovery . Enable Pseudo
Broadcast on the vpi/vci pair , which enables to replicate the broadcast
packets on the NBMA media . Ping the associated broadcast address , you
would get a reply from the peer and whomsoever on the same subnet as well.
int atmx/y.z
pvc vpi/vci
broadcast <========== enables pseudo-broadcast
Alternate method would be to enable debug ip tcp packet and watch for the
source address of the tcp-packet destined to your local peer's address &
bgp port # 179
I am sure there might be other ways as well.
HTH,
Dhans
At 03:52 AM 1/18/01 +0000, Robert DeVito wrote:
>So share with us, after attending ECP1, how would you approach this?
>
>Robert
>
>
>----Original Message Follows----
>From: erik.freeland@pinnacleinc.com (Pinnacle -- Erik Freeland)
>Reply-To: erik.freeland@pinnacleinc.com (Pinnacle -- Erik Freeland)
>To: <ccielab@groupstudy.com>
>Subject: RE: atm ilmi-pvc-discovery
>Date: Wed, 17 Jan 2001 19:09:06 -0800
>
>The exact same issue was presented in the ECP1 class with Val Pavlichenko
>this week. In addition to not knowing the vpi/vci values, he added the
>additional caveat that you dont know any information except the remote
>endpoint is a BGP speaker, that it is correctly configured to speak to you,
>and that it is somewhere in the 192.0.0.0/8 Ip address range.
>
>Determine your VPI/VCI pair & your IP Address.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Rob Webber
>Sent: Wednesday, January 17, 2001 6:54 PM
>To: 'Robert DeVito'; rwebber@callisma.com; padhu@steinroe.com;
>ccielab@groupstudy.com
>Subject: RE: atm ilmi-pvc-discovery
>
>
>I can envision two cases where this might be helpful. One is where the exam
>instructs you that a PVC exists between r1 and r3. You go to the proctor and
>say "but I don't know what the VPI/VCI values are" and the proctor says
>"that's right." In this case I think I would take my approach and ask the
>proctor if it was ok if I manually moved it to my subinterface.
>
>The other case would be where the lab asked you to somehow dynamically use
>and discover them. In this case you can use atm ilmi-pvc-discovery
>subinterface. In this case the router assigns PVCs to the subinterface with
>the same number as the VPI of the PVC. So any PVC with a VPI=1 goes to
>subinterface 0.1, etc. I've never actually tried this one...
>
>Rob.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Robert DeVito
>Sent: Wednesday, January 17, 2001 7:30 PM
>To: rwebber@callisma.com; padhu@steinroe.com; ccielab@groupstudy.com
>Subject: RE: atm ilmi-pvc-discovery
>
>
>That is a very good suggestion.. My only concern is if the test ask you to
>use auto-discovery, you might get marked off... Comments?
>
>Robert
>
>----Original Message Follows----
>From: "Rob Webber" <rwebber@callisma.com>
>Reply-To: <rwebber@callisma.com>
>To: "'Padhu \(LFG\)'" <padhu@steinroe.com>, "'Robert DeVito'"
><robertdevito@hotmail.com>, <ccielab@groupstudy.com>
>Subject: RE: atm ilmi-pvc-discovery
>Date: Wed, 17 Jan 2001 13:41:57 -0500
>
>We did this in the ECP1 class last week. The suggestion is to enable atm
>ilmi-pvc-discovery on your atm main interface. Then do a "show atm pvc" (or
>show atm vc). This will then show you the VPI/VCI of any PVC's the router
>discovered via ilmi with the switch. Then once you know the PVCs (and their
>VPI/VCI), actually go to the atm interface (or subinterface) and manually
>define them with the atm pvc vcd vpi vci (or pvc vpi/vci) command. Then you
>can do your normal mappings, inarp, etc.
>
>Its a nice tool in the event you are given a PVC, but not told what the
>VPI/VCI values are.
>
>Rob.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Padhu (LFG)
>Sent: Wednesday, January 17, 2001 11:39 AM
>To: 'Robert DeVito'; Padhu (LFG); ccielab@groupstudy.com
>Subject: RE: atm ilmi-pvc-discovery
>
>
>anyone on the list who have access to ATM gear - Can u guys confirm this
>pattern or suggest any ideas here to fix ?
>
>Cheers,Padhu
>
>-----Original Message-----
>From: Robert DeVito [mailto:robertdevito@hotmail.com]
>Sent: Wednesday, January 17, 2001 10:39 AM
>To: padhu@steinroe.com; ccielab@groupstudy.com
>Subject: RE: atm ilmi-pvc-discovery
>
>
>That was my exact problem.... Any thoughts??
>
>
>
>----Original Message Follows----
>From: "Padhu (LFG)" <padhu@steinroe.com>
>To: 'Robert DeVito' <robertdevito@hotmail.com>, ccielab@groupstudy.com
>Subject: RE: atm ilmi-pvc-discovery
>Date: Wed, 17 Jan 2001 10:19:54 -0600
>
>I tried this a few weeks ago and couldn't get this to work with eigrp
>...debug ip pack shows encaps failed ...although it assigned the pvcs to the
>"correct numbered " subinterface that i had created. It was rental so didnt
>have too muh time to figure it
>
>-----Original Message-----
>From: Robert DeVito [mailto:robertdevito@hotmail.com]
>Sent: Wednesday, January 17, 2001 12:10 AM
>To: ccielab@groupstudy.com
>Subject: atm ilmi-pvc-discovery
>
>
>Did anyonve have any problems with ilmi-pvc-discovery command and running
>routing protocolss over the atm pvc? If I manually configure the atm pvc's
>mappings into the router eigrp works great, but if I use ilmi auto
>discovery, I was never able to form adjancey over EIGRP...Thoughts?
>
>Thank you,
>Robert
>
>configs:
>R7
>!
>!
>interface ATM1/0
>ip address 192.168.12.7 255.255.255.0
>no ip directed-broadcast
>map-group ccie
>atm pvc 1 0 16 ilmi
>atm ilmi-pvc-discovery
>no atm ilmi-keepalive
>!
>router eigrp 1
>network 192.168.7.0
>network 192.168.12.0
>no auto-summary
>!
>ip classless
>no ip http server
>!
>!
>map-list ccie
>ip 192.168.12.8 atm-vc 3 broadcast
>
>r7#sho ip eigrp nei
>IP-EIGRP neighbors for process 1
>************************************************************************
>R8
>!
>interface ATM1/0
>ip address 192.168.12.8 255.255.255.0
>no ip directed-broadcast
>atm pvc 1 0 16 ilmi
>no atm ilmi-keepalive
>atm ilmi-pvc-discovery
>map-group ccie
>!
>router eigrp 1
>network 192.168.8.0
>network 192.168.12.0
>no auto-summary
>
>!
>map-list ccie
>ip 192.168.12.7 atm-vc 3 broadcast
>
>r8#sho ip eigrp nei
>IP-EIGRP neighbors for process 1
>
>
>
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