The Insecure Wire

a network engineers perspective

Category Archives: Switching

Troubleshooting VMware lost access to volume errors

Recently we have been seeing heaps of these types of errors fill up our VMware ESXi logs: 2015-07-02T02:00:11.282Z cpu10:36273)HBX: 2832: Waiting for timed out [HB state abcdef02 offset 3444736 gen 549 stampUS 115704005679 uuid 5592d754-21d7d8a7-0a7e-a0369f519998 jrnl drv 14.60] on vol ‘example datastore’ And in VCenter task / events for host: Lost access to volume 5592d754-21d7d8a7-0a7e-a0369f519998 […]

Multihoming Cisco 2K FEX with 5K Fabric

Recently we moved our data centre which is a Cisco UCS and Nexus Fabric design. After a very long day moving gear and reconnecting it all back up we couldn’t understand why one of our FEX’s kept flapping from the 5K fabric. The 5K fabric is multi homed to 2 FEX switches each in its […]