Q: Resolving duplicate IP addresses

Apr 09, 2005 4 Replies

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Voitec 21 years ago

Hi,

I get this msg:

0:33:23: %IP-4-DUPADDR: Duplicate address 10.0.0.11 on Ethernet0, sourced by
000
4.003c.0274
0:34:38: %IP-4-DUPADDR: Duplicate address 10.0.0.11 on Ethernet0, sourced by
000
4.003c.0274
0:34:48: %IP-4-DUPADDR: Duplicate address 10.0.0.11 on Ethernet0, sourced by
000
4.003c.0274
0:34:58: %IP-4-DUPADDR: Duplicate address 10.0.0.11 on Ethernet0, sourced by
000
4.003c.0274

My config shows:

************* SanJose1#sh arp Protocol Address Age (min) Hardware Addr Type Interface Internet 10.0.0.11 - 00e0.1eb9.9616 ARPA Ethernet0 SanJose1#sh ip int brief Interface IP-Address OK? Method Status Protocol BRI0 unassigned YES not set administratively down down Ethernet0 10.0.0.11 YES manual up up Serial0 unassigned YES not set administratively down down Serial1 192.168.1.2 YES NVRAM down down SanJose1#

I checked all my LAN PCs and another router's Ethernet interface and there is no other 10.0.0.11. How can I tell where the conflict is coming from?

Thanks, V

Vote

Mike Dorn 21 years ago

You'll need to query your switch infrastructure in order to find the device with mac address 0004.003c.0274. (On a cisco, use "show mac-address-table | inc

0274".) Then just follow the wires...

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test 21 years ago

A quick check on

formatting link

mac adress to come from Lexmark print server

Check IP on your printers

Jon

"Mike Dorn" skrev i meld>> Hi,

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Voitec 21 years ago

Thank you both!

Yep, it was one of the printers. Somehow they were forgotten about in my search...I'd say it's time to label my devices. The coffer link is now in my bookmarks. Nice little site.

Thanks again :) V

Interface

Ethernet0