Hi Everyone,
I'd like to share with you an issue that I'm facing on ASR901 platform. I'm just trying to set up a simple QinQ configuration over a g.8032 Ethernet Ring but I have troubles with MSTP and I don't understand why...
Here is the configuration of my UNI port :
interface GigabitEthernet0/4
negotiation auto
service instance 1 ethernet
encapsulation dot1q 4000
rewrite ingress tag pop 1 symmetric
bridge-domain 4000
!
service instance 2 ethernet !!! This EFP is receiving client VLANs from 500 to 599
encapsulation dot1q 500-599
bridge-domain 2000
!
end
Here is the NNI configuration (to other ASR901 in the ring) :
interface TenGigabitEthernet0/0
no ip address
service instance 1 ethernet evc1
encapsulation dot1q 1000
bridge-domain 1000
cfm mep domain domain-tpm mpid 1
!
service instance 2 ethernet
encapsulation dot1q 4000
rewrite ingress tag pop 1 symmetric
bridge-domain 4000
!
service instance 3 ethernet
encapsulation dot1q 3001 second-dot1q 500-599
rewrite ingress tag pop 1 symmetric
bridge-domain 2000
!
end
When I'm configuring the last EFP on the NNI port, I have this logging entry :
ASR901-1(config)#int te0/0
ASR901-1(config-if)# no service instance 3 ethernet
ASR901-1(config-if)# service instance 3 ethernet
ASR901-1(config-if-srv)# encapsulation dot1q 3001 second-dot1q 500-599
ASR901-1(config-if-srv)# rewrite ingress tag pop 1 symmetric
ASR901-1(config-if-srv)# bridge-domain 2000
Error!!! EFP 3 maps to differenet MST instance than other EFPs in bridge-domain 2000
I don't have any other configuration concerning bridge domain 2000 and I don't have configured any STP commands. I've even deactivated all spanning-tree instances.
Why should I have to deal with MSTP in this situation??
If anyone has any idea, I would appreciate...
Thanks for your feedback and your help.
Pierre-Louis
