LACP Detection issue

[Rishav Garg]

Hi All,

In this scenario, On port channel 10 we executed spanning-tree port type network but on members of same PO10. There is diff command

spanning-tree port type normal. In our env. it's running fine. But we are running static port-channel not LACP.

If we run lacp.. Does LACP will throw error in this scenario? Because i read LACP will always match configuration. between two members or interfaces  NOT Between Portchannel and its member. Kindly help here. Does it true?

interface port-channel10
  description vPC peer-link
  switchport mode trunk
  switchport trunk native vlan 99
  spanning-tree port type network
  vpc peer-link

interface Ethernet1/31
  switchport mode trunk
  switchport trunk native vlan 99
  spanning-tree port type normal
  channel-group 10

interface Ethernet1/32
  switchport mode trunk
  switchport trunk native vlan 99
  spanning-tree port type normal
  channel-group 10

[Reza Sharifi]

Hi,

I think, you will see error and LACP will not work in this scenario.

For VPC peer link, the STP type should be network for all physical links and the Portchannel.

It is also recommended to use LACP:

You can only configure these port channels and vPC peer links statically. All ports in the vPC on each of the vPC peer devices must be in the same VDC. You can configure the port channels and vPC peer links either using LACP or no protocol. We recommend that you use LACP with the interfaces in active mode to configure port channels in each vPC, which ensures an optimized, graceful recovery in a port-channel failover scenario and provides configuration checks against configuration mismatches among the port channels themselves.

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/interfaces/configuration/guide/if_cli/if_vPC.html

HTH