Use this command with the –m option to look at mbuf memory usage, which will tell you something about socket and network memory usage.
/usr/sbin/no -o extendednetstats=0 >>/dev/null 2>&1
67 mbufs in use: 64 mbuf cluster pages in use 272 Kbytes allocated to mbufs 0 requests for mbufs denied 0 calls to protocol drain routines 0 sockets not created because sockthresh was reached -- At the end of the file: Streams mblk statistic failures: 0 high priority mblk failures 0 medium priority mblk failures 0 low priority mblk failures
Use netstat -i <interval to collect data> to look at network usage and possible dropped packets.