[134271] in North American Network Operators' Group
Re: The tale of a single MAC
daemon@ATHENA.MIT.EDU (Randy McAnally)
Sun Jan 2 09:54:21 2011
From: "Randy McAnally" <rsm@fast-serv.com>
To: Graham Wooden <graham@g-rock.net>,<nanog@nanog.org>
Date: Sun, 2 Jan 2011 09:53:40 -0500
In-Reply-To: <C9454E3A.2921F%graham@g-rock.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
---------- Original Message -----------
From: Graham Wooden <graham@g-rock.net>
> Hi there,
>
> I encountered an interesting issue today and I found it so bizarre
> so I thought I would share it.
>
> I brought online a spare server to help offload some of the recent
> VMs that I have been deploying. Around the same time this new
> machine (wešll call it Server-B) came online, another machine which
> has been online for about a year now stopped responding to our
> monitoring (and wešll name this Server-A). I logged into the switch
> and saw that the machine that stopped responding was in the same
> VLAN as this newly deployed, and then quickly noticed that Server-
> Ašs MAC address was now on Server-Bšs switch port. ŗWhat the ...˛
> was my initial response.
>
Fresh OS install from scratch or did you load an image from an existing server?
What make/model of on-board NICs?
--
Randy M.
