Cisco WS-C6506-E port-channel load-balance issues

[Tarmo L]

Hello!

We are dealing with a tricky situation with two Catalyst Cisco devices where one device being Cisco WS-C6506-E and other being Catalyst Cisco 3560G.

Is there any possibility to split the VLAN content/capacity between two 1GE physical interfaces which are merged into port-channel?

Devices are linked together with port-channel, using two 1GE physical interfaces with "channel-group mode on" command. 

Problem is that the traffic is being distributed unequally between two 1GE physical interfaces, where one interface has ~600M of incoming traffic and other one has ~940M of incoming traffic. That means the port-channel is 99% full whereas it should be distributing the traffic evenly between two physical interfaces. We are using VLAN's on these interfaces, where almost all of them are Layer 3 VLAN's (multicast routing).

Our Cisco 6500 stats:

• WS-6506-E
• Image: s2t54-IPSERVICESK9-M, Software 12.2(50r)SYS3
• Supervisor board: VS-SUP2T-10G
• PFC Oparating mode: PFC 4

[MHM Cisco World]

show channel hashchannel-id {src_ip_addr|dest_ip_addr|src_mac_addr|dest_mac_addr|src_port|dest_port} [dest_ip_addr|dest_mac_addr|dest_port]

Check this hash and see traffic is pass through which port then change hash algorithm until you get equal load between ports member.

[Tarmo L]

Hello!

Unfortunately I seem not to have this command available on my WS-6506-E... 

When issuing the "show ?" command, "channel" is not listed as an available command..

[MHM Cisco World]

Cisco recommends make hash algorithm match in both side of PO.

Is it same algorithm?

[balaji.bandi]

check what is configured now

#show etherchannel ?
<1-512> Channel group number
detail Detail information
load-balance Load-balance/frame-distribution scheme among ports in
port-channel
port Port information
port-channel Port-channel information
protocol protocol enabled
summary One-line summary per channel-group
| Output modifiers
<cr>

example :

#show etherchannel load-balance
EtherChannel Load-Balancing Configuration:
src-dst-ip enhanced
mpls label-ip

EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source XOR Destination MAC address
IPv4: Source XOR Destination IP address
IPv6: Source XOR Destination IP address
MPLS: Label or IP

Understand how Etherchannel load-balance works :

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