Patrick, Yes, I saw that quote and also feel that Cisco will someday be getting rid of ISL. However, the fact remains that ISL still exists and there are some hardcore ISL fans over here at EDS. I just can't seem to find a good paper that really explains why 802.1q should be used instead of ISL.
Shawn K. -----Original Message----- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Monday, March 11, 2002 10:43 AM To: [EMAIL PROTECTED] Subject: Re: ISL or 802.1q? [7:37859] well here is a quote from cisco's site http://www.cisco.com/warp/public/473/43.html "Catalyst 2950 series switches only support 802.1q trunking. They do not support ISL trunking" and the 2950 is one of their best of breed switches...maybe this means they will begettign rid of isl soon... -Patrick >>> "Audy Bautista" 03/11/02 10:18AM >>> I've always had the same question in my head. In our environment (all Cisco; at least 4 6509s and about a dozen 2948s, some 3548s, 2924s, etc.) we use 802.1q mostly because the 2948s don't support ISL. We even trunk the 6509s using 802.1q even though of course 6509s support ISL and 802.1q. But I don't know which one is better, and I've done similar searches in the past for more info; no luck. Audy ""Kaminski, Shawn G"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Repost. First one didn't make it. > > > -----Original Message----- > > From: Kaminski, Shawn G > > Sent: Friday, March 08, 2002 2:54 PM > > To: 'Groupstudy' > > Subject: ISL or 802.1q? > > > > After a search of the archives and reading the posts, I realize this > > has been discussed before. I also searched CCO. However, there > > didn't seem to > > be a clear answer on what I was looking for. We have two > > Distribution Cisco 6509 switches trunked together and there is an > > argument as to whether we should use ISL or 802.1q on this trunk. > > Our network is all Cisco. Some people are saying 802.1q on > > everything because Cisco is leaning towards this direction anyway. > > Some say ISL should be used between > > the Distribution switches and 802.1q between Distribution and Access > > switches. I don't know why because I couldn't find anything on this. Some > > of the people here keep saying that ISL has more "features" than > > 802.1q. Could some of you please give your opinions about what you > > would use (ISL > > or 802.1q) in this situation? > > > > Thanks, > > Shawn G. Kaminski > > EDS Network Engineering - DowNET >>>>>>>>>>>>> Confidentiality Disclaimer <<<<<<<<<<<<<<<< This email and any files transmitted with it may contain confidential and /or proprietary information in the possession of WellStar Health System, Inc. ("WellStar") and is intended only for the individual or entity to whom addressed. This email may contain information that is held to be privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized access, dissemination, distribution or copying of any information from this email is strictly prohibited, and may subject you to criminal and/or civil liability. If you have received this email in error, please notify the sender by reply email and then delete this email and its attachments from your computer. Thank you. ================================================================ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=37872&t=37859 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
