When running a Solaris 10 guest in a VMware ESX virtual machine, the user might experience problems with network communication when using fragmented UDP packages. (Doc ID 1020698.1)

Last updated on NOVEMBER 07, 2014

Applies to:

Solaris SPARC Operating System - Version 8.0 and later
All Platforms

Symptoms

Running a Solaris 10 guest in a VMware ESX virtual machine, the user might experience problems with network communication when using fragmented UDP packages.

To check if the system is effected by this issue, you can simply check with "netstat -s" command:

# netstat -s

UDP udpInDatagrams =4038155 udpInErrors = 0
udpOutDatagrams =4038792 udpOutErrors = 0

IPv4 ipForwarding = 2 ipDefaultTTL = 255

...

ipReasmTimeout = 60 ipReasmReqds = 547
ipReasmOKs = 547 ipReasmFails = 0
udpInCksumErrs = 547 udpInOverflows = 0

...

It shows that all UDP datagrams which have to be reassembled (ipReasm*) are recognized as bad UDP checksum (udpInCksumErrs) and are therefor dropped.

i.e

ipReasmReqds = 547
udpInCksumErrs = 547

Cause

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