Re: ARP , CEF and /32 route

Of course I'm assuming you aren't doing mobile ARP which wasn't
mentioned but even if that was the case the static route would be
preferred over the mobile ARP route.

-- 
Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
bdennis_at_ine.com
Internetwork Expert, Inc.
http://www.INE.com
On 03/04/2012 08:38 PM, Brian Dennis wrote:
> There is no order of preference between an ARP entry and a route.  ARP
> is just a layer 3 to layer 2 mapping.  CEF doesn't install ARP entries,
> it install routes in the FIB. This is similar to Frame Relay in that a
> Frame Relay mapping doesn't install a /32 route to the destination.
>
> In your case you've told the router that 192.168.0.100/32 can be reached
> via 192.168.1.2 so why would you ever want it to route out another
> interface?  The most specific route is going to win, ARP entry or not.
> If this wasn't the case someone could inject ARP entries to override the
> routing table ;-)  Talk about a mess.
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