cluster node fenced after issuing lip to rescan storage

Issue

My cluster node got fenced after I rescanned the storage network to add a new LUN. To scan the bus, I used:
```
echo 1 > /sys/class/fc_host/host1/issue_lip
```

Red Hat Enterprise Linux Server 5 (with the Hgh Availability or Resilient Storage Add Ons)
Red Hat Enterprise Linux Server 6 (with the High Availability or Resilient Storage Add Ons)

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