Check the MTU on the NICs on both nodes:
eth0 at 1500 is OK, but the others need to be consistant. [9000]

san01
eth0 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
eth1 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth2 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth3 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth4 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth5 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1

san02
eth0 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
eth1 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth2 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth3 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth4 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1
eth5 UP BROADCAST RUNNING SLAVE MULTICAST MTU:9216 Metric:1