I've done exactly this on the 2900 and 4000 platforms but as discussed only certain cards for the 4000 support ISL.
The reason i used it was ISL to the routers and dot1q to clients. This is because on a router sub-interface SNMP ID's are only created for ISL so in order to monitor individual subints on the router it had to be ISL. Otherwise everywhere else we use standards dot1q. Darren Ward (PGradCS, CCIE #8245, SCSA, CCDP, MCP) On Sun, 22 Dec 2002, Mark Johnson wrote: > Yes, it is possible... It is dependant upon the type of switch you are > using... If it is a 3550, 2950, 4000, etc... You would do > > switchport mode trunk > switchport trunk encapsulation (dot1q or isl) > > This is off the top of my head, so verify the exact syntax... > > Not all switches support both so you will need to check your hardware and > software... > > Mark > -------Original Message------- > From: "[EMAIL PROTECTED]" > Sent: 12/19/02 04:09 AM > To: [EMAIL PROTECTED] > Subject: ISL & 802.1q in one switch [7:59512] > > > > > Hi folks, > > Does anybody have experience with using ISL en 802.1q within the same > switch. I have ISL trunk between my access and distribution layer. Now I > want to connect a firewall on my access switch with 802.1q trunking > protocol. Is it possible? if the answer is YES, should I change anything > in > my configuration? My firewall talks 802.1q with the access switch and the > vlan's should go from access to distribution switch which talk ISL. > > thanks, > Mehrdad Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=59732&t=59512 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
