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Native vlan connectionless in Nexus SW

Amr Hafez
Level 1
Level 1

‎12-02-2015 02:36 AM - edited ‎03-08-2019 02:55 AM

Hi

we using the following topology

1- 2 x N9396TX vPC

2- 2 x C6800 VSS

3- HP blade system C7000 and virtual connect SW

the configuration:

we configured the N9300 using vPC and 6800 using VSS

hp blade system is virtualized using ESXi 5.5 and we have many VM in native vlan and in other vlans

we connected the hp balde to 6800 via trunking port channel (LACP) using 802.1q with the same allowed vlan and native vlan in both sides and all VM could send and receive data traffic

the when connecting hp blade to N9300 via trunking PO (LACP) using 802.1q (this port channel is vPC member port and port type newtork) with the same llowed vlan and native vlan in both sides but we found that the VMs in Native vlan could not send or receive traffic but any other VMs in other vlans could send and receive tarffic 

any suggestions?

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5 Replies 5

Alexey Prilutskiy
Level 1
Level 1

‎12-02-2015 03:15 AM

Check is there STP running and did it block your native vlan on the vPC LAG.

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Amr Hafez
Level 1
Level 1
In response to Alexey Prilutskiy

‎12-02-2015 03:24 AM

yes Vlan 1 not blocking

and we have switches and rackmopunt servers connected to N9300 through acess port vlan 1 and no problem in the connection

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Alexey Prilutskiy
Level 1
Level 1
In response to Amr Hafez

‎12-02-2015 03:33 AM

Can you post sh int <int_name> trunk output here from your nexus trunk vpc?

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Amr Hafez
Level 1
Level 1
In response to Alexey Prilutskiy

‎12-03-2015 12:35 AM

N9396TX(config)# show interface port-channel 100 trunk

--------------------------------------------------------------------------------

Port          Native  Status        Port

              Vlan                  Channel

--------------------------------------------------------------------------------

Po100         1       trunking      --

 

--------------------------------------------------------------------------------

Port          Vlans Allowed on Trunk

--------------------------------------------------------------------------------

Po100         1-4094

 

--------------------------------------------------------------------------------

Port          Vlans Err-disabled on Trunk

--------------------------------------------------------------------------------

Po100         none

 

--------------------------------------------------------------------------------

Port          STP Forwarding

--------------------------------------------------------------------------------

Po100         1-2,6,9

 

--------------------------------------------------------------------------------

Port          Vlans in spanning tree forwarding state and not pruned

--------------------------------------------------------------------------------

Po100         1-2,6,9

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Amr Hafez
Level 1
Level 1

‎12-03-2015 12:45 AM

I wanna add additional informations

1- when connecting a non virtualized server to N9300 using access port to native vlan it work without errors

2- when connecting another switch to the N9300 using trunk port (including native vlan) it works

3- when connecting virtualized server (this server has vlan 10 and 20 and native vlan 1) using trunk port, only the traffic from vlan 1 could not be accessed but other vlans could 

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