Configuration of trunking on a Cisco Nexus switch

[network_geek1979]

On a Nexus switch we can see that the interface is configured for access as well as trunk:

sw-singapore-DC-01# sh run inter po 100

!Command: show running-config interface port-channel1
!Time: Mon Jul 3 22:22:08 2015

version 5.2(1)N1(1b)

interface port-channel1
  switchport mode trunk
  switchport access vlan 60
  switchport trunk allowed vlan 50,60,90

sw-singapore-DC-01#

Few questions:

• Could this king of configuration have any issues?
• What would this configuration really mean. We are defining the port as access for VLAN 60 which means VLAN 60 is the native VLAN, right?
• The switch would forward packets destined for VLAN 60 as untagged i.e. consider this as a access port for VLAN 60.
• Could this block some traffic when broadcasts for other VLAN need to be sent i.e. VLAN 50 and VLAN 90?

Thanks,

N.

[Madhukrishnan Gopinathan Nair]

Hello,

I think you are right for first 2 points. For 3rd i dont think it will block anything.

You must be seeing this interface as trunk under

sh int trunk

Also you can verify further details using

sh int po100 switchport

This will give you details you are looking to confirm.

Hope this helps and please rate it if found useful.

Thanks,

Madhu.