Date: Thu, 4 Dec 2003 21:06:53 -0600 From: "Val P" <secureplay@sbcglobal.net> To: <freebsd-net@freebsd.org> Subject: IP address conflict (transparent bridge) Message-ID: <003d01c3badc$d83ca390$d20a0a0a@jvstice.ops.mil> In-Reply-To: <20031204200110.B7F3916A4EB@hub.freebsd.org>
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I have a bridge configured as follows: Bge0 - management interface, ip a.b.c.d Bge1 - down (not used) Bge2 - "inside" bridge leg, no ip, layer-2 only Bge3 - "outside" bridge leg, no ip, layer-2 only Now, I am seeing some weird behavior. If I try to do any type of net access over bge0, I get console messages such as (paraphrasing, since I don't have it in front of me): /kernel: arp: 1.2.3.4.5.6 is using my ip address a.b.c.d! /kernel: arp: 7.8.9.10.11.12 is using my ip address a.b.c.d! 1.2.3.4.5.6 is the mac of the bge0 interface 7.8.9.10.11.12 is the mac of the bge3 interface So in other words, why am I getting a conflict between the management interface and a leg of the bridge? Is there some weird loop going on? There is no bridging loop happening, this is the only bridge on the subnet and connects two datacenter switches (it's a firewall). The router is upstream on the bge3 side of the bridge. All these interfaces appear to be working fine, the machine is bridging and I can use the management interface with no apparent problems. If I ping continuously, I get those two messages with every ping. Same for telnet, etc. These messages only appeared for the past week, after the machine was brought down and back up. This is freebsd 4.8. stock ipf is in use, ipfw is not in use. Disabling ipf makes no difference. Any input would be appreciated.
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