Double tagged traffic on L3 Interface

Answered Question
Feb 10th, 2012
User Badges:

Hello All,


Traffic tagged with outer vlan 3050 and inner vlan 350 isn't matching the following L3 interface configuration:


interface GigabitEthernet0/4/0/28.3050

vrf ABC

ipv4 address 20.0.0.11 255.255.255.0

encapsulation dot1q 3050


Even with no second tag configured should´t the outer vlan match vlan 3050 configured on the interface ?


Many thanks for your help!


David

Correct Answer by Alexei Kiritchenko about 5 years 1 month ago

Hello David,

Unambiguous vlan definition works for L2 interfaces.

For L3 you should define 2nd tag too.


!

interface GigabitEthernet0/4/0/28.3050

vrf ABC

ipv4 address 20.0.0.11 255.255.255.0

encapsulation dot1q 3050 second-dot1q 350

!


Regards,

/A

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (2 ratings)
Loading.
Correct Answer
Alexei Kiritchenko Fri, 02/10/2012 - 08:01
User Badges:
  • Cisco Employee,

Hello David,

Unambiguous vlan definition works for L2 interfaces.

For L3 you should define 2nd tag too.


!

interface GigabitEthernet0/4/0/28.3050

vrf ABC

ipv4 address 20.0.0.11 255.255.255.0

encapsulation dot1q 3050 second-dot1q 350

!


Regards,

/A

dfranjoso Fri, 02/10/2012 - 08:41
User Badges:

Thanks Akiritch, once again for your prompt response.

Actions

This Discussion