Hello,
we have a problem with the throughput over etherchannel in LACP with 2 or 4 ports.
It is iSCSI traffic (vmware esxi 4.1 U3) is going from 2 separate NICs (ports) to the etherchannel (with 2 or 4 ports) that has a SAN connected (Nexenta).
The SAN is configured in passive LACP and the switch is in active LACP. Actually it does not matter if we do LACP or just MODE ON, still same result: ~1GBit/s throughtput in either direction. Like already mentioned, 2 or 4 ports in the etherchannel make no difference, or the configuration of the etherchannel.
I will post some config data below, but here is the question: Why cann't we see traffic beyond 1GBit/s? Source and destination are capable of doing much more than that (vmware esxi RAID 5 of 1TB SATA; SAN 16 x 1TB NL-SAS). If we look with CNA, we can see that the traffic is balanced equally over the etherchannel ports. With or without QOS or flowcontrol, no difference. This whole traffic happenes on this switch. What are we missing?
Thank you for the answers!
!
port-channel load-balance src-dst-ip
!
interface Port-channel5
switchport access vlan 80
switchport mode access
flowcontrol receive desired
!
interface GigabitEthernet0/30
description vmware iscsi1
switchport access vlan 80
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
flowcontrol receive desired
!
interface GigabitEthernet0/32
description vmware iscsi2
switchport access vlan 80
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
flowcontrol receive desired
!
interface GigabitEthernet0/41
description SAN_aggr1
switchport access vlan 80
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
flowcontrol receive desired
channel-group 5 mode active
spanning-tree portfast
!
interface GigabitEthernet0/42
description SAN_aggr1
switchport access vlan 80
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
mls qos trust cos
flowcontrol receive desired
channel-group 5 mode active
spanning-tree portfast
!
