Nic teaming nexus 7010

Answered Question
Aug 27th, 2010
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Trying to get nic teaming to work. We have two nics on two seperate ports for link aggregation. Creating a portchannel to combined the two ports to make a 2 gig channel at a switchport access layer no trunking. Once interfaces are put in the port-channel I lose connectivity. Has anyone had this issue with broadcom nics. Or where my problem may be he is my config.

Correct Answer by darren.g about 6 years 8 months ago

You need to look at your port configuration


Most OS's, when running "teaming" on NIC's use the LACP protocol for load balancing.


If you run the following command


show port-channel summary


what does it show?


You should see somethign like this


--------------------------------------------------------------------------------
Group Port-         Type     Protocol    Member Ports

          Channel
--------------------------------------------------------------------------------

12     Po1(SU)     Eth        NONE      Eth8/21(P)   Eth8/22(P)


Your configuration at this point


interface Ethernet8/21
  description Nic1
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12
  no shutdown


interface Ethernet8/22
  description Nic2
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12
  no shutdown


Doesn't put your port channel into LACP mode.


Change those two ports to look like this


interface Ethernet8/21
  description Nic1
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12 mode active
  no shutdown


interface Ethernet8/22
  description Nic2
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12 mode active
  no shutdown


Then you should see this after entering "show port-channel summary"


--------------------------------------------------------------------------------
Group Port-         Type     Protocol    Member Ports

          Channel
--------------------------------------------------------------------------------

12     Po1(SU)     Eth        LACP      Eth8/21(P)   Eth8/22(P)


This is dependant on the OS in the server you are NIC teaming on - I know Linux uses LACP for NIC teaming/amalgamation, while Windows doesn't support it natively at all, and needs custom software from the NIC manufacturer to work.


Regardless, the IEEE standard for link aggregation to servers uses LACP, and your configuration on your Nexus wasn't putting the ports into LACP mode.


Regards.

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Correct Answer
darren.g Sun, 08/29/2010 - 19:07
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  • Silver, 250 points or more

You need to look at your port configuration


Most OS's, when running "teaming" on NIC's use the LACP protocol for load balancing.


If you run the following command


show port-channel summary


what does it show?


You should see somethign like this


--------------------------------------------------------------------------------
Group Port-         Type     Protocol    Member Ports

          Channel
--------------------------------------------------------------------------------

12     Po1(SU)     Eth        NONE      Eth8/21(P)   Eth8/22(P)


Your configuration at this point


interface Ethernet8/21
  description Nic1
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12
  no shutdown


interface Ethernet8/22
  description Nic2
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12
  no shutdown


Doesn't put your port channel into LACP mode.


Change those two ports to look like this


interface Ethernet8/21
  description Nic1
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12 mode active
  no shutdown


interface Ethernet8/22
  description Nic2
  switchport
  switchport access vlan 239
  spanning-tree port type edge
  channel-group 12 mode active
  no shutdown


Then you should see this after entering "show port-channel summary"


--------------------------------------------------------------------------------
Group Port-         Type     Protocol    Member Ports

          Channel
--------------------------------------------------------------------------------

12     Po1(SU)     Eth        LACP      Eth8/21(P)   Eth8/22(P)


This is dependant on the OS in the server you are NIC teaming on - I know Linux uses LACP for NIC teaming/amalgamation, while Windows doesn't support it natively at all, and needs custom software from the NIC manufacturer to work.


Regardless, the IEEE standard for link aggregation to servers uses LACP, and your configuration on your Nexus wasn't putting the ports into LACP mode.


Regards.

ARMANDO ALVARADO Mon, 08/30/2010 - 05:44
User Badges:

Thanks Darren,


You were right on worked like a champ I was not aware of this but I will surely remember. Thanks

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