Nexus 5548UP and LACP

[shank10gig]

Hello,

I am trying to setup LACP on the Nexus 5548UP 10 Gig switch on Port-channel 3. However, when I setup LACP, eth ports 7 and 8 (on Port-channel 3) go into either inactive or down state (as below). The 10 gig ports (7 and 8) are connected to a server which has LACP capability.

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ns5500(config-if)# do sh port-channel summary
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
        M - Not in use. Min-links not met
--------------------------------------------------------------------------------

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

1     Po1(SU)     Eth      NONE      Eth1/15(P)   Eth1/16(P)
3     Po3(SD)     Eth      LACP      Eth1/7(D)    Eth1/8(D)

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

LACP setup as follows:

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

feature lacp

interface port-channel3

  switchport access vlan 10

  speed 10000

interface Ethernet1/7
  switchport access vlan 10
  channel-group 3 mode active

interface Ethernet1/8
  switchport access vlan 10
  channel-group 3 mode active

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

It would be great if anyone can help me with getting LACP up and running on the 10 Gig Nexus 5548UP. Please let me know if you need more information.

Thanks!

[Prashanth Krishnappa]

Inactive state usually indicates a missing VLAN in the VLAN database. Do you have VLAN 10 created in the VLAN database?

In the output you show, the interface is down. If the Flag is I, its not inactive but "Individual" meaning the Nexus 5k is not receiving LACP PDUs.  You can do a "show lacp counters" to see if the LACP PDU counters

[shank10gig]

Thanks for your response. I do have vlan10 created and it is active. Thanks for correcting individual state instead of inactive.

I ran a few lacp commands below including "show lacp counters"

ns5500(config)# show lacp counters

                    LACPDUs         Marker      Marker Response    LACPDUs

Port              Sent   Recv     Sent   Recv     Sent   Recv      Pkts Err

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

port-channel3

Ethernet1/7        163655 13948    0      0        0      0        0

Ethernet1/8        161700 13976    0      0        0      0        0

By looking at LACP PDUs can we say that LACP is up and running?

ns5500(config)# show lacp port-channel

port-channel3

  System Mac=54-7f-ee-8d-83-fc

  Local System Identifier=0x8000,54-7f-ee-8d-83-fc

  Admin key=0x2

  Operational key=0x2

  Partner System Identifier=0x0,0-0-0-0-0-0

  Operational key=0x0

  Max delay=0

  VPC ID=0

  Aggregate or individual=1

  Member Port List=7-8

In the below command, it still says, interfaces 7 and 8 are down? What does that mean? An issue with the host? Is there anyway to test the nexus switch to check if it is doing its part and working correctly?

ns5500(config)# show port-channel summary
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
        M - Not in use. Min-links not met
--------------------------------------------------------------------------------

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

1     Po1(SD)     Eth      NONE      --
3     Po3(SD)     Eth      LACP      Eth1/7(D)    Eth1/8(D)

Thanks.