Exam 300-515 topic 1 question 35 discussion

Question is asking to remove VLAN tag and only A and B have "rewrite ingress tag pop 1 symmetric" command. B is wrong since it is missing the l2transport

A seems to be a better fit except for the typo as pointed out. The setup needs l2transport keyword and vlan tag to be popped symmetrically.

D is correct, C is missing the rewrite ingress tag pop 1 symmetric command.

D is correct, C is missing the rewrite ingress tag pop 1 symmetric command.

https://www.cisco.com/c/en/us/td/docs/ios_xr_sw/iosxr_r3-7/mpls/configuration/guide/gc37v2.html

D (incorrect) interface GigabitEthernet 0/10.10 l2transport encapsulation dot1q 10 rewrite ingress tag translate 1-to-1 dot1ad 10 symmetric l2vpn xconnect group 103588 p2p 103588 interface GigabitEthernet 0/10.10 neighbor ipv4 10.10.10.2 pw-id 103588

C (correct) interface GigabitEthernet 0/10.10 l2transport encapsulation dot1q 10 l2vpn xconnect group 103588 p2p 103588 interface GigabitEthernet 2/10.10 neighbor ipv4 10.10.10.2 pw-id 103588

B (incorrect) interface GigabitEthernet 0/10.10 encapsulation dot1q 10 rewrite ingress tag pop 1 symmetric l2vpn xconnect group 103588 p2p 103588 interface GigabitEthernet 0/10.10 neighbor ipv4 10.10.10.2 pw-id 103588

A (incorrect) interface GigabitEthernet 0/10.l2transport encapsulation dot1q 10 rewrite ingress tag pop 1 symmetric l2vpn xconnect group 103588 p2p 103588 interface GigabitEthernet 0/10.10 neighbor ipv4 10.10.10.2 pw-id 103588

C is wrong. https://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/116453-technote-ios-xr-l2vpn-00.html On a Cisco ASR 9000 Series Aggregation Services Router that uses the EVC infrastructure, the default action is to preserve the existing tags. Use the rewrite command to modify the default. Key points in the config should be 'l2transport' command after the subinterface 'rewrite ingress tag pop 1 symmetric' to remove the vlan tag Ignoring the typo on the subinterface only A has both of these features.