Nexus 5000 and port-channeling

[pmpesha]

Greetings,

I do have an IBM 9117 (LPAR)  with 4 network adaptors bundled together in a port-channel on Nexus 5000 switch.  Things are working OK, except the packets traffics on the first two network adaptors instead of distributing the traffic evenly to all four adaptor.  Does anyone have and idea of the cause of this behavior?  Thank you for your assistance.

[Dan-Ciprian Cicioiu]

Hi ,

can you paste :

show port-channel load

show port-channel traffic

show port-channel summ

[pmpesha]

Ok, check below:-

nexus5000SW1# sh port-channel load-balance

Port Channel Load-Balancing Configuration:
System: source-dest-ip

Port Channel Load-Balancing Addresses Used Per-Protocol:
Non-IP: source-dest-mac
IP: source-dest-ip source-dest-mac

nexus5000SW1# sh port-channel traffic

ChanId      Port Rx-Ucst Tx-Ucst Rx-Mcst Tx-Mcst Rx-Bcst Tx-Bcst
------ --------- ------- ------- ------- ------- ------- -------
   303  Eth103/1/30  57.18%   8.59%  53.83%   3.72%   0.36%   0.54%
   303  Eth103/1/3  42.81%  91.40%  46.16%  96.27%  99.63%  99.45%

nexus5000SW1# 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)
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel

303   Po303(SU)   Eth      LACP      Eth103/1/3(P)  Eth103/1/30(P)

Thank you.

[Dan-Ciprian Cicioiu]

you might try change the balancing algorithm

i would try : port-channel load-balance ethernet destination-port

Do you know the balancing algorithm on the LPAR ?

Dan

[pmpesha]

Per our standards, we don't real do the port-channel load balancing on our switches.  But If I have to implement this, can you be specific (global enabled, interface enabled?).  The LPAR is set to balance the load evenly to all four ports.  Thank you for your assistance.

[bmuggall]

Hi,

   I am seeing only two interfaces in the port channel. You may want to add other two also to the channel.

Reg,

Balu

[pmpesha]

The other 2 ports are on a second switch.  Basically we do have two switches connected via vpc.  The output you see are only from the first switch, which is identical to the second switch.  Thank you.

.

[Dan-Ciprian Cicioiu]

Okay then

Can you paste :

sh run int port-channel 303

sh vpc brie

[pmpesha]

OK, check below:-

sh run int po303:

interface port-channel303
  description XXXX
  vpc 303
  switchport access vlan 33
  spanning-tree port type edge

sh vpc brief:

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
303    Po303       up     success     success                    33       

Thanks.