HP FlexFabric Virtual Switch 5900v Troubleshooting Guide

Problems with traffic forwarding

Communication failure between VMs even if the

vNICs are bound to a port group

Symptom

The vNICs of VMs have been added to the port groups. Test connectivity between the VMs with a virtual

ping tool, and they cannot communicate with each other.

Solution

To resolve the problem:

1. Verify the VLAN and VDP configurations for the port group on the Port Group Management >

VLAN Configuration and Port Group Management > EVB Configuration pages.

2. Identify whether the VLAN configured for the port group is in the VLAN Trunk list of the uplink port.

If they are not, add the VLAN to the list.

3. Verify the VDP status:

a. Click the port group name on the HP Port Group tab.

The VDP State column displays the VDP status of the vNICs of the port group. WAIT_SYS_CMD

indicates that the VDP is operating correctly. INIT indicates that the VDP is operating

incorrectly.

b. Execute the display evb vsi command on the EVB switch to display VSI information.

<Sysname> display evb vsi

Status: A -- Association, P -- Pre-association

VSI VTID Type Instance Status

interface version ID

SCH-AGG100:1.0 5 1 8635f3726e2807ac14f... A

SCH-AGG100:1.1 5 1 fb3cf4c517c9bfdf44d... A

SCH-AGG100:1.2 5 1 d63f84c0f08f650c5d0... A

The number of VSIs must be the same as the number of vNICs configured with VDP on the VDS.

If the status of a VSI is A, it indicates that the VSI is operating correctly. If the number of VSIs

is smaller than the number of vNICs configured with VDP, or the status of a VSI is P, it indicates

that the vNIC corresponding to the VSI does not get online.

Incorrect operation of the VDP might be caused by network flapping. To resolve the problem,

add the vNIC to the port group again.

4. See "Verifying link aggregation configuration" to verify link

aggregation information. If the port

that connects the EVB switch to the server is not added to a correct port group, packets might be

sent through another port according to the load balancing algorithm.

5. Execute the dpctl dump-tables command to display the number of flow tables on a VFE:

~ # dpctl dump-tables 0x768a5defd040e902