08-27-2010 01:42 PM - edited 03-01-2019 06:51 AM
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.
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08-29-2010 07:07 PM
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.
08-29-2010 07:07 PM
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.
08-30-2010 05:44 AM
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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