iSCSI Jumbo Frame & Latency check

Very simple bash script to check iSCSI network targets. It validates they’ll accept non-fragmented jumbo frames and measures their latency.
The three variables you must pass to the script are the target IP, the warning & critical thresholds (in ms).

Example:
./check_iscsi 192.168.1.250 3 5

This would ensure jumbo frames are enabled for 192.168.1.250, return a warning if the latency exceeded 3ms and a critical if it exceeded 5ms