Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Converting from ISL to 802.1q

I have a switched network with a 6509 and a bunch of 2924's and 3548's that has been using ISL for its trunking protocol. Now I've purchased some 2950's and have discovered that they don't support ISL and I have to convert to 802.1q. How painful is this going to be? Any gotchas that I need to be aware of?

3 REPLIES
Cisco Employee

Re: Converting from ISL to 802.1q

It should be pretty straightforward change. But make sure the native VLAN on both switches match for a dot1q trunk. Also the following page should be useful

http://www.cisco.com/warp/public/473/#Trunking

New Member

Re: Converting from ISL to 802.1q

Thanks. I didn't think it would be too difficult, but you never know. Is the lack of ISL support a trend? I've been looking for some sort of statement on the website that would indicate whether Cisco was going to continue to support ISL in future products but haven't yet found anything.

Cisco Employee

Re: Converting from ISL to 802.1q

We will continue supporting ISL, but lot of customers prefer dot1q since it's a IEEE standard

100
Views
4
Helpful
3
Replies
CreatePlease login to create content