From: Michael Stout (michaelgstout@hotmail.com)
Date: Fri Aug 11 2006 - 21:08:24 ART
I beleive it is a requirement to have a DR/BDR on a broadcast network.
If you want to use a DR only you need to convert to a multipoint, a non
broadcast, or a multipoint nonbroadcast.
If you debug the ospf hellos and adjacencies, you'll see what im talking
about.
I seems like ospf is happy to get a DR but it goes down when the bdr is
not elected. then the cycle repeats itself.
You can increase the hello and dead interval for the nonbroadcast
networks if you are in a hurry.
When your neighbor relationship established the debug will go crazy but
it will settle down.
I just saw a cool undebug all Kron job that runs every minute if you want
to do something to protect your session.
<Mike
--------------------------------------------------------------------
From: "Russell Kelly (rukelly)" <rukelly@cisco.com>
Reply-To: "Russell Kelly (rukelly)" <rukelly@cisco.com>
To: <ccielab@groupstudy.com>
Subject: OSPF Broadcast Network Type Running on Frame Relay Network
Question
Date: Sat, 12 Aug 2006 01:28:45 +0200
Hi,
An OSPF config question - I thought I had tried all combinations -
but
ran across the Issue below
I have configured a frame relay hub and spoke (3 routers) with
broadcast
support on the frame-maps and have mapped all routers to each other
(via
the hub) like below
Spoke eg ---
--------------
interface Serial0/0.134 multipoint
ip address 187.1.134.4 255.255.255.0
ip pim sparse-mode
ip ospf network broadcast
ip ospf priority 0
frame-relay map ip 187.1.134.1 403 broadcast
frame-relay map ip 187.1.134.3 403
no frame-relay inverse-arp
end
Hub eg
--------
interface Serial0/0.134 multipoint
ip address 187.1.134.4 255.255.255.0
ip pim sparse-mode
ip ospf network broadcast
ip ospf priority 0
frame-relay map ip 187.1.134.1 301 broadcast
frame-relay map ip 187.1.134.3 304 broadcast
no frame-relay inverse-arp
End
So I though I'd try something different and set the all interfaces to
ip
ospf network broadcast and set the ospf priority to 0 on the spokes
and
255 on the hub. The neighbors came up to full adjacency and the ospf
databases looked the same (though the LSA routing bit not set was on
some routes - why? - ) - R1 did not have any routes installed whist
R3
and R2 had all the opsf routes - I then changed so they were full
mesh
(each had a dedicated DLCI to each other) - this still did not
work -
note these routers can ping each other with no issues and multicast
support was confirmed on the FR.
Is there a rule re. hub and spoke and full mesh Frame-relay networks
and
running opsf network type broadcast on all routers? This works fine
when the spokes are changed to non-broadcast and the hub left as
broadcast (no neigbor statements configured)
Any help or explanation greatly appreciated!!
Russell
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