17 messages in net.nether.puck.cisco-nsp[c-nsp] eigrp question
FromSent OnAttachments
Kern, TomJan 5, 2005 12:16 pm 
Kern, TomJan 5, 2005 12:29 pm 
Kern, TomJan 5, 2005 1:00 pm 
Rodney DunnJan 5, 2005 1:34 pm 
Kern, TomJan 5, 2005 1:36 pm 
Jim McBurnettJan 5, 2005 2:14 pm 
Kern, TomJan 5, 2005 3:56 pm 
Rodney DunnJan 5, 2005 4:41 pm 
Jim McBurnettJan 5, 2005 4:50 pm 
Kern, TomJan 5, 2005 4:56 pm 
Marty AdkinsJan 5, 2005 5:19 pm 
Jim McBurnettJan 5, 2005 11:29 pm 
Gert DoeringJan 6, 2005 4:14 am 
Pekka SavolaJan 6, 2005 5:10 am 
Randy BushJan 6, 2005 8:54 am 
Gert DoeringJan 6, 2005 9:35 am 
Randy BushJan 6, 2005 9:45 am 
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Subject:[c-nsp] eigrp questionActions...
From:Gert Doering (ge@greenie.muc.de)
Date:Jan 6, 2005 9:35:37 am
List:net.nether.puck.cisco-nsp

Hi,

On Thu, Jan 06, 2005 at 12:10:33PM +0200, Pekka Savola wrote:

BGP is a better approach to routing here, because with BGP you can open a TCP session through the firewall (for BGP) and the packets will still flow the normal way, and can be inspected.

I'd be pretty careful about BGP as well. You'll likely eliminate the benefits of BGP because the the firewall will have to have static routes corresponding to the BGP-advertised prefixes, or you'll end up having a routing loop sooner or later because the firewall doesn't have sufficient topology information....

Yes, sure. This is only going to work in specific scenarios, like

Router <inside> -- firewall -- Router <outside> -- Internet

and Router "<inside>" needs to know if "Internet" is broken, to use some backup path via other <inside> routers and firewalls.

In that case, the firewall would have a default route to "outside", and static routes for all internal networks, and BGP is only there to signal "line outage".

Of course if you do anything more fancy, chances for a routing loop are fairly high (like in any case of doing something dynamic routing wasn't directly intended for, without really understanding all details).

gert