http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800ef7b2.shtml
On Mon, Oct 3, 2011 at 4:28 AM, Geoff Falk <geoff_f...@yahoo.com> wrote: > Do you have any sort of default gateway set on the 2960G? (ip > default-gateway blah). > > The only time I've seen this on a L2 switch is when it doesn't have any L3 > routing information, and as a result is just broadcasts an arp for > everything remote, and the router answers via proxy-arp (@#$!*& Cisco and > probably every other vendor for not making "no ip proxy-arp" a default on > interfaces IMO) leaving all the remote IP entries with the local router's > mac address in the arp cache. > > It does beg the question though why it's looking for all those IP's in the > first place, though I suspect you need to answer that one anyway :). > > Geoff > > > >________________________________ > >From: John Elliot <johnellio...@hotmail.com> > >To: cisco-nsp <cisco-nsp@puck.nether.net> > >Sent: Sunday, October 2, 2011 7:09 PM > >Subject: [c-nsp] Large number of arp entries on 2960G > > > > > >Hi Guys, > >Running a management vlan(11) on a 2960S stack->2960G->7200 + 2509(for > OOB) - i.e. 4 IP's > >sh arp on 2960s, shows 3 entries (int vlan11)sh arp on 2509, shows 3 > entries (int eth0)sh arp on 7200, shows 4 entries(on dot1q vlan 11)sh arp on > 2960g, shows over 1000 entries, all with the 7200's mac address, all on > interface vlan11 - all entries appear to be "random" IP's, in that they are > routes(IP's) learned from upstream bgp peering sessions and also some from > our internal ospf...none of these bgp sessions or ospf are running in dot1q > vlan11 > >The only difference I can see on the 2 switches vlan interfaces is the > 2960g(The one with all the strange arp entries) has "no ip route-cache". > >Any suggestions as to what could be causing this? > >Cheers. > > > > > > > > > >_______________________________________________ > >cisco-nsp mailing list cisco-nsp@puck.nether.net > >https://puck.nether.net/mailman/listinfo/cisco-nsp > >archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/