While troubleshooting VLAN connectivity on UCS in end-host mode with multiple uplinks, it is be good to know which uplink is the designated receiver (listener for broadcast and multicast) for which VLAN. This will be useful when you have L2 connectivity issues, where 1 or more VLANs are having issues going outside the Fabric Interconnects.

Considering the length of the command to find the designated receivers, I haven’t memorised the command itself, but the which command to find it:

UCS-FI-A(nxos)# which | inc vlandb
(2511) show platform software enm internal info vlandb { all | xlatetbl | id  }

After … Read more


When using a Cisco UCS C-Series rack servers in it’s standalone form (not connected to Fabric Interconnects, so not managed through the UCS Manager), you can boot it using a few options: local storage, fiberchannel connected storage, PXE boot and iSCSI.

When you don’t have fiberchannel at your disposal for central boot, iSCSI will do just fine.

The configuration inside the C-Series CIMC is a bit hidden though, here’s how you do it. Login to your CIMC and follow this procedure:

  • 1. Go to Inventory
  • 2. Select the ‘Cisco VIC Adapters’ tab
  • 3. Select the ‘vNICs’ sub-tab
  • 4. Click ‘Add’
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This post is part of my CCIE Datacenter reference series and will cover all there is to get FCoE up and running on the Cisco Nexus 7k, 5k and 2k switches.

The text assumes you have a understanding knowledge of fundamentals (storage paths, flogis, vPC, etc) and can be used as a configuration reference (I basically wrote this for myself).

Installing & Enabling FCoE

Nexus 7K

Installing and enabling FCoE on the Nexus 7k involves getting the storage VDC up and running. This section will cover just that.

QoS

The Nexus 7k comes with a default QoS policy of default-nq-8e-policy, … Read more


When working on a large project, I tend to make overview sheets for myself to track progress. My CCIE Datacenter project is no difference. I’ve been asked to share my CCIE Datacenter progress excel sheet a bunch of times now, so I figured I’d put it here: CCIE DC Progress Sheet

 

It has been put together with inspiration from other sheets and it assumes you have an INE subscription for their excellent videos.… Read more