Thanks Yoram - Jason said the same thing, so I think we'll give that a go as it's a simple config change.
I suppose then, the symptoms will still occur, but only for a maximum of 2 workstations plugged into the Cisco switch. Thanks to everyone who responded. Am aware that auth is best, but we haven't time to do that at the mo. Cheers, Nick. 2011/3/8 Yoram Nissenbaum <[email protected]> > hi, > Another easy way is to limit MAC "capacity" per port with the "Maclock" > setting. > Set the value of first arrival=(2 if you have Phone+PC or just 1). > This way first MAC (or 2) is locked to the port dynamically. > Traffic from any other MAC is dropped at the port. > MAC to port mapping is reset when link is down. > This way you minimize the impact of the scenario to described to ONE or > NONE PC effected. > Rdg. > Yoram. > > -----הודעה מקורית----- > מאת: William Olive [mailto:[email protected]] > נשלח: ג 3/8/2011 23:06 > אל: Enterasys Customer Mailing List > נושא: RE: [enterasys] Cross-connected switch... > > Spanguard won't do it (otherwise Cisco phones would not work on C2s, which > they obviously do). > > This is a tough one Nick. Policy is probably your best bet. > > Billo > Data Communications Co-Ordinator > Information Technology & Telecommunications > Hunter New England Health Service > ph 0249 213804 fax 0249 213038 > [email protected]<mailto: > [email protected]> > > From: Nick Allen [mailto:[email protected]] > Sent: Wednesday, 9 March 2011 02:55 > To: Enterasys Customer Mailing List > Cc: Read, Simon > Subject: Re: [enterasys] Cross-connected switch... > > Ok - thanks Simon. Will look into that. > > Cheers, > > N. > On 8 March 2011 14:31, Read, Simon <[email protected] > <mailto:[email protected]>> wrote: > Hi Nick, > > Spanguard lock would do it. > > > Kind regards, > > Simon Read > Service Engineer > > Nashua Communications (Pty) Ltd. > Unit 10 Growthpoint Business Park, > No 2 Tonnetti Street, Midrand, 1685 > M: +27 84 676 9200 > Fax: +27100012500 > [email protected]<mailto: > [email protected]> > www.nashua-communications.com<http://www.nashua-communications.com> > > [ > https://mail.google.com/mail/?ui=2&ik=285ad60f7c&view=att&th=12e960796c801397&attid=0.1&disp=emb&realattid=d6589c2bdb13_0.1&zw > ] > > From: Nick Allen [mailto:[email protected]<mailto: > [email protected]>] > Sent: 08 March 2011 04:29 PM > > To: Enterasys Customer Mailing List > Cc: Read, Simon > Subject: Re: [enterasys] Cross-connected switch... > > Sorry - I should have been more verbose. > > What' I'd really like to happen is that the port would somehow detect that > it's a rogue connection and shut off that port so that inter-connection > can't happen in the first place. > > N. > On 8 March 2011 14:19, Read, Simon <[email protected] > <mailto:[email protected]>> wrote: > Hi Nick, > > Use Policy to only allow DHCP from a specific server? > > > Kind regards, > > Simon Read > Service Engineer > > Nashua Communications (Pty) Ltd. > Unit 10 Growthpoint Business Park, > No 2 Tonnetti Street, Midrand, 1685 > M: +27 84 676 9200 > Fax: +27100012500 > [email protected]<mailto: > [email protected]> > www.nashua-communications.com<http://www.nashua-communications.com> > > [ > https://mail.google.com/mail/?ui=2&ik=285ad60f7c&view=att&th=12e960796c801397&attid=0.1&disp=emb&realattid=d6589c2bdb13_0.1&zw > ] > > From: Nick Allen [mailto:[email protected]<mailto: > [email protected]>] > Sent: 08 March 2011 04:05 PM > > To: Enterasys Customer Mailing List > Subject: [enterasys] Cross-connected switch... > > Hi, > > We have an office with an Enterasys C2G in it. > Also in that office and in the same cabinet is a Cisco switch that belongs > to another sister company. > > Devices plugged in the Cisco switch were getting IP address in the DHCP > range that would normally be only available on the C2. > We traced it with Compass to an IP phone with the passthrough port plugged > into the Cisco switch instead of a workstation. > > What's the best way to prevent this happening from a config point of view > on the Enterasys only (given that we don't have access to the Cisco). > > Thanks, > > Nick. > > > C4-2C-03-29-E8-FE > 10.113.11.1 > > > > -- > > This e-mail is intended only for the named person or entity to which it is > addressed and > > contains valuable business information that is proprietary, privileged, > confidential and/or > > > > > > otherwise protected from disclosure. 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