Hi,
we use Cisco Nexus 1000v (4.2(1)SV2(1.1a)) as DVS with 2x 10 GigE Uplinks for vMotion Interfaces (NIC: Broadcom BCM57810). Jumbo Frames are activated on all relevant switches.
Before the ESX patch 1021289 I got nearly 10 Gbit/sec between two virtual machines on different ESX hosts (Debian Linux with iperf). After the update I only get 1.25 GBit/sec with the same setup and no other changes.
Some relevant configurations:
Cisco Nexus 1000v:
port-profile type ethernet UPLINK-VMOTION
vmware port-group
switchport mode trunk
switchport trunk allowed vlan $VMOTIONVLAN
mtu 9000
channel-group auto mode active
no shutdown
description UPLINK-VMOTION
state enabled
port-profile type vethernet vMotion
vmware port-group
switchport mode access
switchport access vlan $VMOTIONVLAN
no shutdown
state enabled
The connected physical switch (Nexus 5548):
interface port-channelX
description $SWITCHNAME
switchport mode trunk
switchport trunk allowed vlan $VMOTIONVLAN
speed 10000
no snmp trap link-status
Any ideas?
Kind regards,
Rene