The vmkernel.log contains the warning message: Truncated Port name for LRO for port

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:
The vmkernel.log file (located at /var/log in ESXi 5.x and /var/log/messages in ESXi 4.x) contains entries similar to:

YYYY-MM-DDT12:41:02.925Z cpu6:322034)Net: 1652: connected vm-testdevenv-02.abc.test.com.eth0 0 to vDS, portID 0x300000b
YYYY-MM-DDT12:41:02.925Z cpu6:322034)Net: 1985: associated dvPort 18437 with portID 0x300000b
YYYY-MM-DDT12:41:02.967Z cpu60:322046)NetPort: 1427: disabled port 0x3000007
2012-10-25T12:41:02.967Z cpu60:322046)Net: 2191: dissociate dvPort 18435 from port 0x3000007
YYYY-MM-DDT12:41:02.967Z cpu60:322046)Net: 2195: disconnected client from port 0x3000007
YYYY-MM-DDT12:41:02.968Z cpu60:322046)Net: 1652: connected vm-testdevenv-02.abc.test.com.eth0 eth0 to vDS, portID 0x300000c
YYYY-MM-DDT12:41:02.968Z cpu60:322046)Net: 1985: associated dvPort 18435 with portID 0x300000c
YYYY-MM-DDT12:41:11.553Z cpu12:322031)WARNING: Vmxnet2: 5602: Truncated Port name for LRO for port 0x4100438af400
YYYY-MM-DDT12:41:11.553Z cpu12:322031)NetPort: 2602: resuming traffic on DV port 18437
YYYY-MM-DDT12:41:11.553Z cpu12:322031)NetPort: 1240: enabled port 0x300000b with mac xx:xx:xx:xx:xx:xx
YYYY-MM-DDT12:41:12.928Z cpu58:322039)WARNING: Vmxnet2: 5602: Truncated Port name for LRO for port 0x4100438afe80

Environment

VMware ESXi 4.0.x Installable
VMware ESXi 4.1.x Installable
VMware ESX 4.1.x
VMware ESXi 4.1.x Embedded
VMware ESXi 4.0.x Embedded
VMware vSphere ESXi 5.0
VMware vSphere ESXi 5.1
VMware ESX 4.0.x
VMware vSphere ESXi 5.5

Cause

This warning message can occur if the virtual machine name combined with the port ID exceed 32 characters. For example:

Name: vm-testdevenv-02.abc.test.com.eth1
Port ID: 0x300000c

In this example, the combined length is 43 characters, which exceeds the 32 character limit. The warning message indicates that part of the name is truncated. It can occur if you are using any VMXNET series of virtual adapter, including VMXNET3.

Resolution

This warning message is harmless and can be safely ignored.

Additional Information

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VMkernel log に次の警告メッセージが出力される：Truncated Port name for LRO for port

Impact/Risks:
There is no impact on the virtual machine, or the host networking.