Hello All,
We've run across a rather odd issue with inter-vlan/bridge-domain routing on a ME-3600X-24FS switch.
When routing to a directly connected subnet from single tagged EVC's we don't see any issues. However, when routing from a double tagged EVC to a single tagged EVC, in different bridge-domain's, same VRF, routing dies. We can successfully PING from a host on the double tagged EVC to an IP on the opposite bridge-domain/vlan configured locally on the 3600X, just not a host connected to the single tagged EVC. We can also successfully PING from a host on the double tagged EVC to a host on the same bridge-domain on a single tagged EVC. So the issue here seems to be from a double tagged EVC to a single tagged EVC, located in a different bridge-domain, same VRF.
From all of our testing this is starting to look like a possible IOS bug. However, we wanted to run this past the community first in case anyone has run into a similar issue or had any suggestions.
Sample config:
Double tagged EVC on G0/1:
service instance 1 ethernet
description (removed)
encapsulation dot1q 1101 second-dot1q 1104
rewrite ingress tag pop 2 symmetric
bridge-domain 99
!
Single tagged EVC on G0/2:
service instance 3 ethernet
description (removed)
encapsulation dot1q 98
rewrite ingress tag pop 1 symmetric
bridge-domain 98
!
VLAN interface config:
interface Vlan98
description (removed)
ip vrf forwarding MGMT
ip address 10.64.0.129 255.255.255.240
!
interface Vlan99
description (removed)
ip vrf forwarding MGMT
ip address 10.64.2.1 255.255.254.0
!
