From: Russell Kelly \(rukelly\) (rukelly@cisco.com)
Date: Fri Aug 11 2006 - 21:29:26 ART
That seem to sort of fit the situation - but I have never seen that
stated - do you have any references to this? Also seems strange that
when the spokes are set to non-broadcast all is fine - ?
Russ
________________________________
From: Michael Stout [mailto:michaelgstout@hotmail.com]
Sent: 12 August 2006 01:08
To: Russell Kelly (rukelly); ccielab@groupstudy.com
Subject: RE: OSPF Broadcast Network Type Running on Frame Relay Network
Question
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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