From: George Bekmezian (george@bekmezian.com)
Date: Wed Nov 13 2002 - 11:53:31 GMT-3
My theory on why this doesn't work is because OSPF packets have a TTL of
1. And any packets sent from a spoke has to traverse the hub before it
gets to the other spoke, which is never going to happen. Try doing some
debugging and see if any packets from C are making it to A.
Regards,
George Bekmezian
#10704
|-----Original Message-----
|From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
|Behalf Of Tao Wang
|Sent: Tuesday, November 12, 2002 9:12 PM
|To: spage@nc.rr.com; ccielab@groupstudy.com
|Subject: RE: OSPF on NBMA
|
|
|I see this config should work.
|But my question is that in NBMA if I could ping successully
|whether I could
|build
|neigbor with the command "neighbor" even these two nodes
|haven't directly
|PVC.
|
|
|>From: "Jake Jake" <spage@nc.rr.com>
|>To: "Tao Wang" <wangtao_sh@hotmail.com>, <ccielab@groupstudy.com>
|>Subject: RE: OSPF on NBMA
|>Date: Wed, 13 Nov 2002 00:10:17 -0500
|>
|>Configure B as the DR. Use neighbor statements on B pointing
|to A and
|>to
|C.
|>Make sure A and C had low ospf priority so they dont become DR upon
|reboot.
|>
|>
|>-----Original Message-----
|>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On
|Behalf Of
|>Tao Wang
|>Sent: Tuesday, November 12, 2002 11:01 PM
|>To: ccielab@groupstudy.com
|>Subject: Q: OSPF on NBMA
|>
|>
|>Dear all,
|>
|>I have question on OSPF on FR NBMA.
|>
|>There are 3 nodes--- A B and C. They build a Hub-Spoke structure. B is
|HUB.
|>
|>Now I config to make C as DR and using the command "neighbor"
|to let B
|>and A as the neighbors of C. On A B and C, I have made
|static maps to
|>make them be able to ping each others successfully.
|>
|>But the result is C and A couldn't build neighbor with each other. I
|>don't understand the command "neighbor" very much.C should use the
|>unicast to send the hello packet to A. If C should ping A
|successfully,
|>then the hello packet from C should be able to get A.
|>
|>From the result, I think if two nodes want to build neighbors
|with each
|>other in NBMA, they should have dirctly PVC between them.But I don't
|>know why exactly.
|>
|>Does someone please help?
|>
|>Thanks & Regards
|>
|>Tao
|>
|>
|>
|>
|>
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