You are correct, you will have to set up ISL or 802.1Q trunking between the
switch and router. You will do this by creating sub-interfaces under one of
the built in Fast-Ethernet ports and encapsulating ISL or dot1Q for each of
these sub-interfaces. You also need to follow the ISL or dot1Q
encapsulation command with the VLAN number for each sub-interface.
You will have to use ACLs to stop the VLANs from communicating with each
other...
Chris Lemagie
Systems Engineer
Cisco Systems
Seattle Commercial Region
(425) 468-0959
[EMAIL PROTECTED]
http://www.cisco.com/
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Perry Lucas
Sent: Monday, October 30, 2000 5:46 AM
To: [EMAIL PROTECTED]
Subject: ISL Router and 3548 Switch Question
I have two 3548 switches gigastacked and a 2621 router running IP Plus
connected to the Internet on one side and the switch on the other. I need
to set up 5 different VLANs on the switches that do not / can not route
between each other, but do need to see the 2621 to get out to the internet.
I know I need to set up ISL trunking to the router but not sure how do it or
set it up so that they can all get out to the Internet but not each other.
All the vlans are dividing up the same Class C IP block.
Perry
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