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Port channel

Guys , can you help me with port channel, traffic on ports is not evenly distributing

6 REPLIES 6
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VIP Advisor

Hi there,

port-channels do not load-balance on a per-packet basis and therefore will not give an even load distribution. Instead they use a hashing algorithm to balance on combinations of packet header attributes. Different platforms have varying options. Have a look at this document for further info:

 

https://www.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html#matrix

 

cheers,

Seb.

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VIP Mentor

Can you post configuration and output

 

show run intter po X

show run |  in etherchannel

 

make sure both the side same kind of config to load share

 

port-channel load-balance {src-mac | dst-mac | src-dst-mac | src-ip | dst-ip | src-dst-ip | src-port | dst-port | src-dst-port | mpls} global configuration command in order to configure the load balancing.

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interface Port-channel1
 description ____to_RTN980
 mtu 1532
 no ip address
 negotiation auto
 lacp failover non-revertive
 lacp max-bundle 3
 lacp min-bundle 2
 service instance 10 ethernet
  encapsulation dot1q 10
  rewrite ingress tag pop 1 symmetric
  bridge-domain 10

Highlighted

Show port-channel load balance

 

Do this command,

notes:-

ClientS -SW1-SW-Server

you want to make load balance in port channel between two sw,

you will go deep 

what is the constant not change ?

for server the MAC address is same,

for server IP address is same,

for server the port address is same,

for clientS , the MAC address and IP address and port is different, so in SW1 make load balance do according to source Mac or source ip or source port.

i prefer Mac and port.

 

 

Highlighted
Enthusiast

show port-channel load-balance 

 

Do this command,

notes:-

ClientS -SW1-SW-Server

you want to make load balance in port channel between two sw,

you will go deep 

what is the constant not change ?

for server the MAC address is same,

for server IP address is same,

for server the port address is same,

for clientS , the MAC address and IP address and port is different, so in SW1 make load balance do according to source Mac or source ip or source port.

i prefer Mac and port.

 

 

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Guys thank you , i solved my problem , with port channel load-balancing by ip