From: Robert CCIE (robertccie@gmail.com)
Date: Tue Feb 05 2008 - 15:40:26 ARST
Hi Greg,
I labbed this up
R1-R2-R4
R1-R3-R4
R4 was advertising the 192.168.1.0/24 and I put a static route after i
verified that R1 was learning that route through ospf. The static route
was put in and the ospf route was removed. From what I tried I'm
guessing that you can only install one route with same prefix from one
routing protocol. But one routing protocol can install multiple routes
into the table.
Greg Wendel wrote:
> Adding to what Joe said, If you manually change the admin distance
> which causes a tie, the router will choose the winner based on the
> default admin distances per protocol. I would guess that the static
> route would win due to its lower default admin distance. I don't have
> a chance to lab this at the moment, but I would be curious to see the
> results.
>
>
>
> On Feb 5, 2008 1:50 AM, Joseph Brunner <joe@affirmedsystems.com
> <mailto:joe@affirmedsystems.com>> wrote:
>
> Both would be in the routing table. But there will no load
> balancing unless
> cef is disabled (no ip cef). With cef the OLDEST or first learned
> route is
> USED only... so if you want true load balancing using the routing
> table,
> disable cef.
>
> josCEF
>
> -----Original Message-----
> From: nobody@groupstudy.com <mailto:nobody@groupstudy.com>
> [mailto:nobody@groupstudy.com <mailto:nobody@groupstudy.com>] On
> Behalf Of
> Robert CCIE
> Sent: Monday, February 04, 2008 8:07 PM
> To: ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
> Subject: Route preference
>
> Hello Everyone,
> I was just wondering how a router behaves in these situations. If a
> router learns a route through a routing protocol but there is a static
> route with the same admin distance configured. Which route would be
> installed in the routing table? Or would both be installed?
> Also, I'm
> guessing metrics only matter for that routing protocols process as far
> as calculation since a static route has a metric of 0.
>
> So, if a router is learning 192.168.1.0/24 <http://192.168.1.0/24>
> through ospf and there is a
> static route for 192.168.1.0/24 <http://192.168.1.0/24> with AD of
> 110. Thank you in advance.
>
> -Robert
>
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>
>
> --
> Gregory Wendel
> Springfield VA, 22153
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