Weird sniffer issue... [7:22273]
Okay I know that you may be getting sick of my sniffer questions since this is the second one this week, but I've never seen this before, so here goes. I'm using good ole' Etherpeek and while monitoring a network I started getting duplicate IP address errors. After further investigation Etherpeek shows the MAC address of the router as the conflicting MAC. This is happening on several servers supposedly having a duplicate address as the router interface on the same segment. I have never ran into this problem before, so I thought that I would ask the experts. What is causing this to happen and why? I'm starting to think that computers are the work of the devil! Routers and switches to a lesser extent... TIA, Eric Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=22273&t=22273 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Weird sniffer issue... [7:22273]
I'm certainly not one of the experts on this list, but have seen this before on a couple of our LAN segments. It turned out that the server group was using the same IP address on two different NICs on the same server. This was a process recommended by one of the Windows operating systems to create redundancy and load sharing at the server level. After an extended trial and error process, I believe the resolution was to change to a different manufacturer of NICs. Something about the binding software of something Larry Puckette Network Analyst CCNA,MCP,LANCP Temple Inland [EMAIL PROTECTED] 512/434-1838 -Original Message- From: McMasters, Eric [mailto:[EMAIL PROTECTED]] Sent: Friday, October 05, 2001 4:46 PM To: [EMAIL PROTECTED] Subject: Weird sniffer issue... [7:22273] Okay I know that you may be getting sick of my sniffer questions since this is the second one this week, but I've never seen this before, so here goes. I'm using good ole' Etherpeek and while monitoring a network I started getting duplicate IP address errors. After further investigation Etherpeek shows the MAC address of the router as the conflicting MAC. This is happening on several servers supposedly having a duplicate address as the router interface on the same segment. I have never ran into this problem before, so I thought that I would ask the experts. What is causing this to happen and why? I'm starting to think that computers are the work of the devil! Routers and switches to a lesser extent... TIA, Eric Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=22280&t=22273 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Weird sniffer issue... [7:22273]
EtherPeek alerts you to a duplicate IP address if it has different MAC address for the same IP address. Could this be an issue with proxy arp on the router? Neil ""McMasters, Eric"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Okay I know that you may be getting sick of my sniffer questions since this > is the second one this week, but I've never seen this before, so here goes. > > I'm using good ole' Etherpeek and while monitoring a network I started > getting duplicate IP address errors. After further investigation Etherpeek > shows the MAC address of the router as the conflicting MAC. This is > happening on several servers supposedly having a duplicate address as the > router interface on the same segment. I have never ran into this problem > before, so I thought that I would ask the experts. What is causing this to > happen and why? > > I'm starting to think that computers are the work of the devil! Routers and > switches to a lesser extent... > > TIA, > Eric Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=22319&t=22273 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
