XR | XC Local Switching

HI Guys,

Just want to ask your input about this, Is it require to match the same MTU for local switching in XR?

I configured below scenario and its currently up and working even MTU doesnt match. Ex

XR-R1#int g0/0

mtu 9000

XR-R1# inteface g0/0.10

mtu 9014

l2transport

encapsulation dot1q 100

rewrite ingress tag pop 1 symmetric

XR-R1# inteface g1/1

l2transport

mtu 9014

Verification:

#sh l2vpn xcon

----------------------------------------------------------------------------------------

Test LocalSW UP Gi0/0.19 UP Gi1/1 UP

----------------------------------------------------------------------------------------

Details:

AC: GigabitEthernet0/0.10, state is up

Type VLAN; Num Ranges: 1

VLAN ranges: [100, 100]

MTU 8996; XC ID 0x80009; interworking none

AC: GigabitEthernet1/1, state is up

Type Ethernet

MTU 9000; XC ID 0x80008; interworking none

XC shows that it is up.

for g0/0.10 will subtract 14bytes for l2mtu and 4bytes for tag equls 8996. While on g1/1 will only subtract l2mtu cause there no encapsulation.

So if packet will arrive on G0/0.12 the allow MTU will be 8896. and the MTU that will be transmitted into G1/1 is same 8996.

Thank you for your inputs.