Using vxrlink to diagnose packet reordering-related network issues
|Article:HOWTO64297|||||Created: 2011-12-29|||||Updated: 2012-01-12|||||Article URL http://www.symantec.com/docs/HOWTO64297|
Veritas Volume Replicator (VVR) uses a number of memory slots on the Secondary site to store incoming network I/O. By default, number of messages slots is 1024. If the network has high packet reordering, the default number of message slots may not be enough. Packets will get dropped if they are out of order, and this will impact replication performance.
# vxrlink -g dg1 -i10 -e stats rlink1 Errors : ------ No memory available : 0 No message slots available : 0 No memory available in nmcom pool on Secondary : 0 Timeout : 0 Missing packet : 0 Missing message : 0 Stream : 0 Checksum : 0 Unable to deliver due to transaction : 0
Article URL http://www.symantec.com/docs/HOWTO64297