9k vpc orphan-port mac-address learning

[lukaszkhalil]

Hello

I've just faced an issue with mac address learning by an orphan port connect to a VPC node (N9k).

I have dual side HSRP running on both: group 1 (SW1/SW2) and group 2 (7k-1/7k-1) in a particular vlan (10 in this example).

Strange thing is that both 7k learns SW1/SW2 hsrp mac address correctly (0000.0c07.ac02) but at the same time only SW2 see the hsrp group 1 correctly (0000.0c07.ac01).

Somehow SW1 does not learn 0000.0c07.ac01 via the port 1/48 from 7k-1.

The SW1/1/48 link works correctly because the HSRP is running though it and it works fine.

I've add a diagram which describe the topology.

Does anybody have an idea why does it happen?

Thank you in advance for any answer

Best regards

Lucas

[MHM Cisco World]

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[Sergiu.Daniluk]

Hi @lukaszkhalil 

I see some inconsistencies in what you mentioned about configured groups and learned mac addresses.

Can you share the cfg of SVI10 and show hsrp group X from all 4 switches?

Also, another question: N9K1 and N9K2 are configured in a vPC domain?

Cheers,

Sergiu

[lukaszkhalil]

Sorry

I apologize. I made a mistake in the diagram. Of course 9k are running HSRP group 2 and 7k hsrp group 1.

SW1# sh run interface vlan 10

interface Vlan10
no shutdown
ip address 192.168.1.2/28
hsrp 2

priority 30

ip 192.168.1.1

SW2# sh run interface vlan 10

interface Vlan10
no shutdown
ip address 192.168.1.3/28
hsrp 2
priority 20
ip 192.168.1.1

7k-1# sh run interface vlan 10

interface Vlan10
no shutdown
ip address 192.168.1.12/28
hsrp 1

priority 30
ip 192.168.1.14

7k-2# sh run interface vlan 10

interface Vlan10
no shutdown
ip address 192.168.1.13/28
hsrp 1

priority 20
ip 192.168.1.14

Regarding the vpc, no, 9k are not running vpc. These are two orphan routers. The HSRP is "closed" through the 7k.

This is exactly the issue I have. Each one should learn the 7k hsrp independently on its uplink.