07-08-2004 08:43 AM - edited 03-02-2019 04:56 PM
I have 2 cisco switches that are on their own separate subnets and I want to connect them via trunking. Is this possible if neither switches are layer 3? Thanks.
07-08-2004 09:12 AM
Hello,
you can connect the switches via trunking, but the subnets will not be able to talk to each other without some Layer 3 device.
Regards,
Georg
07-08-2004 11:41 AM
Thanks - would I still need a layer 3 device if I configured vlans on a single switch (switch only has layer2)
07-08-2004 12:18 PM
You always need a layer 3 device when trying to communicate across subnets(vlans).
Switch1(vlan1) trunk Switch2(vlan1)
-------------- ========= --------------- === Router1
Switch1(vlan2) link Switch2(vlan2)
Trunking just allows the vlans to be spanned across two switches. So a device on vlan1 that sends a broadcast out to its subnet another device on vlan1 on the other switch will see that traffic.
07-08-2004 12:19 PM
Sorry the little diagram was sooo much prettier before I hit the post button. Lesson learned. ;-)
07-27-2004 03:15 AM
Hi,
when it comes to IP its a layer 3 so u need a router or a L3 switch in both cases (vlans on same switch or different switches) to perform routing between different vlans
regards,
Hani Farouk
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