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Nexus 7K load balancing problem on LACP

I have conneccted a server with LACP on Nexus extender. I am starting different file copy from diffferent sources to this server, it does not load balance.

source addresse: 192.168.30.3  /  192.168.30.1

destination: 192.168.30.2

10    Po10(SU)    Eth      LACP      Eth111/1/1(P)  Eth111/1/2(P) 

interface port-channel10

  switchport

  switchport access vlan 10

  flowcontrol send on

interface Ethernet111/1/1

  switchport

  switchport access vlan 10

  channel-group 10 mode active

  no shutdown

interface Ethernet111/1/2

  switchport

  switchport access vlan 10

  channel-group 10 mode active

  no shutdown

This output says it is goinfg to different ports but NOT... 111/1/1 has no outgoing traffic..

NX1-Test(config-if)# sh port-channel load-balance forwarding-path interface port-channel 10 src-ip 192.168.30.3 dst-ip 192.168.30.2 module 1

Missing params will be substituted by 0's.

Module 1: Load-balance Algorithm: src-dst ip

RBH: 0x1        Outgoing port id: Ethernet111/1/2

NX1-Test(config-if)# sh port-channel load-balance forwarding-path interface port-channel 10 src-ip 192.168.30.250 dst-ip 192.168.30.2 module 1

Missing params will be substituted by 0's.

Module 1: Load-balance Algorithm: src-dst ip

RBH: 0x7        Outgoing port id: Ethernet111/1/1

  • LAN Switching and Routing
2 REPLIES
Hall of Fame Super Silver

Re: Nexus 7K load balancing problem on LACP

Hello Muhammed,

load balancing should be based on EXOR of last significant bit of IP source address and  last significant bit of IP destination address as in other Cisco platforms. (for a two links bundle)

You have tried file transfer starting from 192.168.130.1 and 192.168.130.3 both have less significant bit = 1, while the destination is always the same.

Try to start the File transfer using an even address so that less significant bit is 0 instead of 1, as for example using 192.168.130.250.

It should use the other member link as showed in the show command

Hope to help

Giuseppe

New Member

Re: Nexus 7K load balancing problem on LACP

sorry, i have typed it wrong..

i have tried this:

source addresse: 192.168.30.250  /  192.168.30.1

destination: 192.168.30.2

  and

output shows different ports.. but not working.

NX1-Test(config-if)# sh port-channel load-balance forwarding-path interface port-channel 10 src-ip 192.168.30.3 dst-ip 192.168.30.2 module 1

Missing params will be substituted by 0's.

Module 1: Load-balance Algorithm: src-dst ip

RBH: 0x1        Outgoing port id: Ethernet111/1/2

NX1-Test(config-if)# sh port-channel load-balance forwarding-path interface port-channel 10 src-ip 192.168.30.250 dst-ip 192.168.30.2 module 1

Missing params will be substituted by 0's.

Module 1: Load-balance Algorithm: src-dst ip

RBH: 0x7        Outgoing port id: Ethernet111/1/1

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