Solved: Clarification on trunking on this 'cascaded' switch

news2010a · ‎05-22-2009

Imagine I have the following:

Switch1 (all ports on Vlan1)

fa0/10 ---connected to-----fa0/10Switch2

Switch2 (all ports on Vlan2)

If I want hosts from Vlan2 to communicate with switch1 Vlan1 hosts, I would need to do:

switch1

int fa0/10

switchport mode trunk

switchport allowed vlan 2

and do the same on switch2.

Is that correct?

John Blakley · ‎05-22-2009

That's correct, but you'd need to create a vlan 2 on the vlan 1 switch and vice versa. The vlan's need to match on both switches. Then configure your int fa0/10 like your example.

You *may* need to change your line to allow vlan 1 also (but it's native by default, so you may not):

switchport allowed vlan add 1,2

HTH,

John

HTH, John *** Please rate all useful posts ***

View solution in original post

John Blakley · ‎05-22-2009