We have a QinQ tunnel configured between two 7609.
The tunnel is used to connect two L2 switches (one 6509 and a 3750).
The problem that we have is with different inner vlans (vlan 501 and vlan 621) with same mac-addresses.
The moment we enable both vlans on the trunk, applications cease to operate.
I know from experience this shuld work fine in a pure L2 topology as long as every switch has a per-vlan-mac-address table.
But when it comes to QinQ Im not sure.
Any help or comment would be greatly appreciated.
Hardware description:
CISCO7609
WS-SUP720-3BXL
WS-X6748-SFP
Software description:
IOS s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(18)SXF8
Topology is the following
SW3750 = dot1q trunk = switchport mode dot1q-tunnel =7609 =vlan73= 7609= switchport mode dot1q-tunnel = dot1q trunk = 6509
7609 Configuration of QinQ Ports
interface GigabitEthernet1/5
description ##To 6509 ##
switchport
switchport access vlan 73
switchport mode dot1q-tunnel
mtu 9216
no ip address
logging event link-status
load-interval 30
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
no cdp enable
spanning-tree portfast
spanning-tree bpdufilter enable
end
!
interface GigabitEthernet2/11
description ##To 3750 ##
switchport
switchport access vlan 73
switchport mode dot1q-tunnel
mtu 9216
no ip address
logging event link-status
load-interval 30
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
no cdp enable
spanning-tree portfast
spanning-tree bpdufilter enable
end
