VPC vlan issue

[opnineopnine]

hello

I have the following topology,  2 NK7 as Layer3, and 4 NK5 as layer 2.  I have the vlan 30.

I created a new vpc in the NK5 vpc 20, this vpc has 2 interface 1/1 - 1/2 (10gb each)  to this vpc I have a trunk that allows vlans 30, 100-500, when i create this, I started to see that MAC/IP that are not in my vpc 20, started to go via this VPC, and off course I started to loos connectivity to other IPs in this vlan.  When I remove the vlan 30 from this vpc everything starts to work normally.

The vpc configuration is normal, nothing strange. The only thing I found that in the NK7 I have a vpc 20 also. The other vpc are where I have the vlan 30 have interface in 1gb.

I don't see where the error can be.

Thanks. 

[Reza Sharifi]

Hi,

It appears you have some sort of loop. Are the 5ks configured as vPCs?

Can you post relevant config from all devices?

[opnineopnine]

Hello,

Yes they are in vpc also. what config will you need? 

thanks.

[Ganesh Hariharan]

Hi ,

I am assuming you have Vpc between 7ks ,5ks etc and between 7k and 5k single vpc which is running overall trunk traffic from access to 7k.

and you are creating vpc at 5ks and server for active interface load balancing, make sure the configuration are synced at both the switches for vPC between server and switches.

-GI

[opnineopnine]

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
30  MGMT(192.22.136.0/24) active Po5, Po10, Po41, Po150, Po151
Po152, Po153, Po300, Eth1/2
Eth1/5, Eth1/6, Eth1/7, Eth1/8
Eth1/17, Eth1/18, Eth1/19
Eth1/20, Eth1/41, Eth1/42
Eth1/43, Eth1/44, Eth1/45
Eth1/46, Eth1/47, Eth1/48
Eth2/3, Eth2/4, Eth103/1/18
Eth103/1/19, Eth103/1/20
Eth103/1/25, Eth103/1/27

VLAN Type Vlan-mode
---- ----- ----------
30 enet CE

Primary Secondary Type Ports
------- --------- --------------- -------------------------------------------

interface port-channel20
switchport mode trunk
switchport trunk allowed vlan 50-51,100
vpc 20

[Ganesh Hariharan]

Hi,

What is the output of show vpc consistency-parameters and show vpc brief on N5k ?

Could you please paste the output.

-GI

[opnineopnine]

Please see the attachment.  so it can be more clear.

thanks. 

[opnineopnine]

Hello Ganesh,

From my Nk5 to my NK7 I have to vpc port-channels 31-32 that go from my fabric interconnect to my nk5, and when I added a vlan 30 to the trunk from this vpc I got a loop in spanning-tree.

thanks. 

[Reza Sharifi]

Hi,

vlan 30 config from all switches and also the output of "sh vpc" from all switches.

HTH