Re: OSPF Config methods - Frame Rel

From: James (james@towardex.com)
Date: Wed Jul 07 2004 - 16:03:48 GMT-3


Dan, Rohan,

I see it now, Thanks!

-J

On Wed, Jul 07, 2004 at 08:04:10PM +0530, Rohan Grover wrote:
> Hi,
>
> There are 5 ways in which you can do it
>
> 1)Use neighbour command on Hub router and make sure hub router is DR using 'ip ospf priority'. Also all other spoke routers should
> be ineligible to be BDR. Prior to IOS 11.0 (I think) this way the only method.
>
> 2)Use 'ip ospf network broadcast' under FR interface. This removes the necessity for neighbour command. But you still need to
> explicitly make the hub router as DR. Make sure 'frame-relay map' has broadcast keyword.
>
> 3)Use 'ip ospf network point-multipoint' under FR interface. This wll cause ospf to treat all links as p-p links and doesn't need
> DR-BDR election. Make sure 'frame-relay map' has broadcast keyword.
>
> 4)Use 'ip ospf network point-point'. This is the easient method. All links have to be P-P though and you'll have multiple subnets.
>
> 5)Use 'ip ospf network point-to-multipoint non-broadcast'. This would be used for FR svcs, which don't want the OSPF packets to be
> multicast but unicast. Neighbour config is required here.
>
> I don't think Frame-Relay SVC is part of CCIE lab.
>
> Thanks
> Rohan
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Daniel Sheedy
> Sent: Wednesday, July 07, 2004 6:39 PM
> To: James; ccielab@groupstudy.com
> Subject: Re: OSPF Config methods - Frame Rel
>
>
> Hi James,
>
> When they are talking about 5 ways, I think they are talking about the types of ospf network available
>
> point-to-point
> point-to-multipoint
> point-to-multipoint non-broadcast
> broadcast
> non-broadcast
>
> Dan Sheedy
>
>
> ----- Original Message -----
> From: "James" <james@towardex.com>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, July 07, 2004 3:02 PM
> Subject: OSPF Config methods - Frame Rel
>
>
> > Hi all,
> >
> > So I hear there are 5 different ways to configure OSPF over
> > frame-relay network..
> >
> > AFAIK, the couple ways that are popular are:
> > o Configure OSPF over point-to-point subinterfaces using /30 per
> > subint,
> and
> > create seperate broadcast domain + adjacency over each interface.
> > o Configure OSPF over hub-and-spoke topology via point-to-multipoint. Hub
> > router can be set as DR.
> >
> > What are some other popular ways people use to conf OSPF over frame
> networks,
> > both in real life and in CCIE lab environment? (Or did I hear
> > something
> wrong in
> > that someone said there are 5 ways? :-P)
> >
> > Thanks!
> > -J
> > --
> > James Jun TowardEX
> Technologies, Inc.
> > Technical Lead Network Design, Consulting, IT
> Outsourcing
> > james@towardex.com Boston-based Colocation & Bandwidth
> Services
> > cell: 1(978)-394-2867 web: http://www.towardex.com , noc:
> www.twdx.net
> >
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-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                        Network Design, Consulting, IT Outsourcing
james@towardex.com                  Boston-based Colocation & Bandwidth Services
cell: 1(978)-394-2867           web: http://www.towardex.com , noc: www.twdx.net


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