Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Issue with EVC and MAC learning

Hi,

I have a testing scenario that seems no to work and I don't find eny clue.

On switch 3800-B I have configured this two ports. To the port  0/8 I have connected a host with IP address and MAC f0f7.55cf.6201.

interface GigabitEthernet0/8
switchport access vlan 20
end


interface GigabitEthernet0/7
switchport trunk allowed vlan none
switchport mode trunk
service instance 1 ethernet
  encapsulation dot1q 10 second-dot1q 11
  rewrite ingress tag pop 2 symmetric
  bridge-domain 20

Then I connect the interface 0/7 of this switch to the switch 3800-A to port 0/8. Port is configured as follows.

  bridge-domain 15 interface GigabitEthernet0/8
switchport trunk allowed vlan none
switchport mode trunk
service instance 1 ethernet
  encapsulation dot1q 1-4094 second-dot1q 1-4094
  bridge-domain 15

The connectivity is going further, but issue is happening here.

I see MAC adress of the host on the 3800-B Gi0/8,

  20    f0f7.55cf.6201    DYNAMIC     Gi0/8

but I do not see this MAC at the port and service instance on the switch 3800-A ??

Do I have missed something or there is any issue with double tagging on this platform ?

I appreciate quick response and thanks for any hint.

Metod

2 REPLIES
Cisco Employee

Issue with EVC and MAC learning

I am still not clear with the requirement. What exactly are you trying to achieve?

If you can draw a topology with the required result, I would be able to help you with the configuration.

-Waris

New Member

Issue with EVC and MAC learning

Hi Waris,

the whole configuration consists of some other links and connections, so I might have had a loop somewhere. I completelly changed the design and it works.

Thank you for your engagement and best regards.

Metod

654
Views
0
Helpful
2
Replies