VLAN access port question

PeraHoman
PeraHoman used Ask the Experts™
on
I saw this in a customer's environment and I'm not sure how its working?  Doesn't SW1 need to be on the same VLAN as the CUSTOMER?  

SW3 G1/1/1 (CUSTOMER) ---------   SW1 F1/0/33(vendor fiber backbone network)  -------- SW2 G1/1/1 (CUSTOMER)

SW1
interface FastEthernet1/0/33
switchport access vlan 223
switchport mode access
end

SW2
interface G1/1/1
switchport access vlan 507
switchport mode access
end

SW2
interface G1/1/1
switchport access vlan 507
switchport mode access
end
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
nader alkahtaniInformation security consultant

Commented:
The link between any two switches must be trunk
Top Expert 2014
Commented:
Not necessarily. Protocols such as QinQ can transport VLANs over different VLANs.
Instructor
Top Expert 2015
Commented:
Doesn't SW1 need to be on the same VLAN as the CUSTOMER?  
No.  If a trunk doesn't exist between switches then VLAN's are locally significant only.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial