I have a scenario where I need some "special" handling for vlans and am not sure how to configure this switch to handle it. Software is:
IOS (tm) C3550 Software (C3550-I9Q3L2-M), Version 12.1(9)EA1c Switch model is WS-C3550-24. Here is the scenario I need to configure: Most ports are configured as trunk mode, so any vlans I add to gear outside the switch just pass through as I configure them. I have 4 ports (13-16) that need to be separate. Currently, these are set up as "switchport access vlan20". This configuration effectively creates a separate "switch", which is what I need. What I would LIKE to do, is have the ability to have those 4 ports allow me to create vlan configuration on gear plugged into these ports as well. In other words, I want to create "2 switches" and have any port that is part of "switch 1" pass vlans unhindered between those ports and "switch 2" do the same. I hope this is clear. I only need a quick example, as I am somewhat familiar with the configs, just not sure how to overcome the single vlan limit on the access port. The problem I have is that SOME gear on some of these ports are vlan unaware (and it needs to stay that way). Here is a portion of the config showing the 3 port configuration types: ! interface FastEthernet0/9 description Kelly Office switchport trunk encapsulation dot1q switchport mode trunk no ip address ! interface FastEthernet0/10 no ip address ! interface FastEthernet0/13 description Accounting switch switchport access vlan 20 switchport mode access no ip address ! In practice, port 13 (14-16 are exactly like 13) cannot see traffic on either port 9 or 10. Ports 9 and 10 can see each other (which is what I need) Any vlan that I configure on gear plugged into ports 9 or 10 are simply passed through. Ports 13-16 do not permit the vlan on the gear to pass. -- Butch Evans Training and Support for WISPs 702-537-0979 http://store.wispgear.net/ http://www.butchevans.com/
