As per http://www.cisco.com/en/US/docs/unified_computing/ucs/release/notes/OL_24086.html UCM 1.4 release notes the VLAN virtual port limit in release 1.4(1) is 6000. Any plans from Cisco to resolve this issue soon??? We have two UCS chassis which comprise of 16 B200M2 blades, two 6120XP Fabric Interconnect. As per the network architecture we decided, all these blades were supposed to be part of one VMware vCenter Cluster and each blade to have 4 vNICs for carrying customer traffic. Each customer will get a separate VLAN for network isolation; that means to migrate the customer's VM anywhere across these 16 blades I need to configure his VLAN on all the blades and their vNICs. But if I configure his VLAN on all the 16 blades I will be consuming 64 (16 blades x 4 vNIC/blade) VLAN virtual ports for one customer. Conversly, with 6000 VLAN virtual port I can have 6000/64 = 93 customers ONLY on 16 blade cluster with 12 Core CPU, 64GB Memory each. We are running a public cloud for SMBs on this setup where customers comes up with average 2-3 VMs requirement with around 4GB memory; considering these numbers and 1:3 memory overcommitment we have 1TB (16 blades x 64GB) physical memory and around 3TB with overcommitment. That means the setup was expected to handle atleast around 300 customers or more but due to this VLAN virtual port limitations we are limitted to 93 customers (I haven't yet included VMware Mgmt VLANs) I think UCS or rather vBlock is just good for private cloud and not public one unless VLAN virtual port limit issue is resolved.
... View more