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Looking at my ARP table, I converted as many MAC addresses as possible back to IPs in the new block. Then I looked those up in the participants list. I've copied the direct email addresses. Hopefully that will get the relevant networks to remove the old addresses faster. On Mon, 2014-08-18 at 15:39, Charles Monson <[log in to unmask]> wrote: > We noticed there are still a few address with the legacy > 69.147.218.0/24 IP space from Airstream Communications (WIN) still > configured on the MICE exchange. I would expect everyone has moved to > the new address space by now and probably just didn't remove the > secondary IP addresses. We would like use this space for other > purposes now that everyone should be migrated, but don't want to have > routing issues for anyone with it still configured. > > Listed below are the IP addresses and corresponding MAC addresses > still showing up when I check the ARP table (our side has > 69.147.218.10 configured). > #show arp gig1/11 | i 69.147.218 > Internet 69.147.218.101 22 5c5e.abd5.9ef0 ARPA GigabitEthernet1/11 > Internet 69.147.218.103 48 000c.2923.4e35 ARPA GigabitEthernet1/11 > Internet 69.147.218.44 0 b0c6.9ade.0640 ARPA GigabitEthernet1/11 > Internet 69.147.218.50 150 0023.33c6.a0c0 ARPA GigabitEthernet1/11 > Internet 69.147.218.53 164 10f3.1134.e6de ARPA GigabitEthernet1/11 > Internet 69.147.218.104 16 5c5e.abd0.da78 ARPA GigabitEthernet1/11 > Internet 69.147.218.250 175 0004.9ba4.3000 ARPA GigabitEthernet1/11 Here's what I found: 206.108.255.101 Compudyne [log in to unmask] 206.108.255.103 Genesis Wireless/RevNetData [log in to unmask] b0c6.9ade.0640 Mankato MICE Switch, already being looked at. 206.108.255.50 Cooperative Network Services (CNS) [log in to unmask] 206.108.255.53 Stellar Association [log in to unmask] 206.108.255.104 Windomnet (City of Windom) [log in to unmask] 0004.9ba4.3000 ??? -- Richard