When I create pools of wwn and macs for a service profile template, is there a block of addresses that start with an OUI that are specific to UCS? In this guide: http://www.ciscosystems.sc/en/US/products/ps10281/products_configuration_example09186a0080af7515.shtml, I can see the a tip in the window of this picture: http://www.cisco.com/image/gif/paws/110297/create-sp-ucsblade-11.gif that specifies using a prefix of 20:00:00:25:B5:xx:xx:xx will ensure uniquiness in the WWN names but when I'm at the same screen on our UCS, I don't see this tip. The same goes for the MACs, is there a block with certain values I should start with? The MAC section of the guide shows 02:25:B5:00:00:00 in the configuration window: http://www.cisco.com/image/gif/paws/110297/create-sp-ucsblade-09.gif but is this unique to UCS?
For MACs Cisco has registered the OUI 00:25:b5 the last three octets are up to you. You can either make up some arbitrary numbers or you can put some logic behind it. Here is what I recommend for MACs.
- Create two MAC pools; one for Fabric A and one for Fabric B
- For the last three octets use the first one for the site/cluster and the next for the fabric A or B. For example site 1, cluster 1 and Fabric A would be this 00:25:b5:11:a0:00 and go up from there. Fabric B would be this 00:25:b5:11:b0:00 and cluster 2 would be this 00:25:b5:12:a0:00.
For the WWNNs and WWPNs you will want three pools; one for the node WWN and two for the port (vHBA) WWN.
Same concept here for the WWNNs use something like 20:11:00:25:b5:00:00:00 for site 1 cluster 1 and 20:12:00:25:B5:00:00:00 for site 1 cluster 2.
For the WWPN pools do one for Fabric A and one for Fabric B like this
- Fabric A site 1 cluster 1 - 20:00:00:25:b5:11:aa:00
- Fabric B site 1 cluster 1 - 20:00:00:25:b5:11:bb:00
By creating MAC and WWPN pools for each Fabric you can easily identify which Fabric a MAC or WWN is coming from when looking the MAC table on a switch or when zoning you can easily pick out WWNs. Could be useful when troubleshooting as well.