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Proxy ARP strikes again

spidey07

No Lifer
You would think I know better by now. Some lab guys needed some networks to play with so I gave them a layer2 link and address and told them to use a routing protocol from there. Being the smart guys they were they were putting addresses in this same l2 network and everything was hunky dory. Then they started looking at the switch arp tables which by now only has a single vlan. This way they knew that layer2 looked good and they could confidently enable a routing protocol. There are addresses from ALL OVER the place in their tables.

I had to take a look at it and scratched my head - this isn't right. Why the hell is it using arp for these?

*word to the wise*
make sure the ip routing command is in your config otherwise it's just doing L2. turned on L2 routing and the switch couldn't reach anything off it's own network, like it's supposed to.

I actually heard this is one of the things they do to screw you up on the CCIE lab, it throws you for a loop.
 
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