EVM Message

[Amanda Deer]

I get this message quite a lot in the evmlogs.

EVM Log Error 500 - vmunix: tu0: transmit FIFO underflow: threshold raised to: 512 bytes.

Is there something I can do to stop this happening, or is it nothing to worry about?

[Venkatesh BL · Accepted solution]

Check this:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=210880

[Amanda Deer]

We have 3 members in our Cluster, but we only get this message on one of them. Is there any way we make sure the load is spread over all 3 members?

[Venkatesh BL]

Can you check "# /sbin/sysconfig -q tu" on all the nodes?

[Amanda Deer]

All 3 nodes have the same -

tu:
StoreAndForward = 0
delay_6694F = 1

[Ivan Ferreira]

Is the network adapter speed all set the same?

Use hwmgr get attr -cat network to verify the speed settings

Use:

lan_config -i if_name -a 0 -s 100 -x 1

To set to 100 MB full duplex.

I saw this recommendation in another forum.

Also, there is an indication to verify that /sbin/kloadsrv is running.

[Amanda Deer]

I recently moved these machines and set them all to be 100 full duplex. I have also checked that kloadsrv is running.

[Johan Brusche]

You cannot spread transmissions from one node over other nodes. Only spreading the applications that generate the sending traffic over the members can do that.
If the application is cluster aware(multi-instance) and the connectins are initiated by network clients, then using the cluster alias mecanism can spread the connections over the members.

You can spread the traffic over multiple interfaces on the same node by combining them into a LAG (Link Aggregation unit)

Rgds,
____ Johan.