From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Wed Nov 19 2003 - 19:22:30 GMT-3
At 5:19 PM -0500 11/19/03, Danny.Andaluz@triaton-na.com wrote:
>I'm trying to hide the existence of a specific subnet via a specific
>source. I still need R1 to have the route, just not if the link
>between R5 and R3 is down. All my research tells me the same things
>you have just said. I'll have to figure out some other way to do
>this. Thanks, Howard.
Right off the top of my head, have you looked at introducing BGP into
the mix and using conditional advertisement?
>Danny
>
>-----Original Message-----
>From: Howard C. Berkowitz [<mailto:hcb@gettcomm.com>mailto:hcb@gettcomm.com]
>Sent: Wednesday, November 19, 2003 4:24 PM
>To: ccielab@groupstudy.com
>Subject: Re: Filtering specific LSA's in OSPF
>
>
>At 10:43 AM -0500 11/19/03, Danny.Andaluz@triaton-na.com wrote:
>>Hey, Group. Does anyone know of a way to filter specific LSA from
>>leaving or coming into a router. I'm having an issue in our production
>>network. I know you can do the "database-filter-all out" and the
>>"neighbor database-filter", but it blocks everything. I'm looking for
>>something similar to what EIGRP can do with dist-lists. I can do a
>>distribute-list in and keep it from being installed in the routing
>>table of the router and this works fine, but the LSA still comes in and
>>gets sent downstream to other neighbors. Any ideas?
>>
>
>I'd ask immediately "what issue are you having in the production network?"
>
>If you think you are having a problem with router performance due to
>too many LSAs, the proper solution may be to split up your areas or
>use routers with faster processors.
>
>If you are trying to hide the existence of a specific subnet, OSPF
>simply isn't designed to do that. When I have to do that sort of
>thing, or to specify a special traffic-engineered preferred paths, I
>normally use static routes in addition to OSPF. Such static routes
>are never redistributed into OSPF, being filtered out during
>redistribution if other static routes do need to be given to OSPF.
>
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