Hi, Cisco Gurus:
I have read that Cisco B-Series Half-Width Blade has an aggregate bandwidth of 20GB, may I seek some authoritative answers from this forum?
2 IOM/2 FInterconnect with 8 Half-Width Blades in UCS 5108 Chassis-2 Server Links Per IOM-Left and another 2 Server Links on Right IOM
With the above setup, which Fabric or IOM will be used, A or B?
Server Link 1 Slot/Blade 1,3,5,7---------------- Which IOM will be used for these Blades?
Server Link 2 Slot/Blade 2,4,6,8---------------- Which IOM will be used for these Blades?
How to derive the 20G bandwidth in Cisco documentation?
If Blade 1 O/S is doing a write I/O request, say deterministically via IOM A (Left of Chassis), if there is another Read I/O issued by Blade 1 again, will the I/O path go through IOM B(Right of Chassis) or will it go through IOM A again? Is there any algorithm here in determining this?
How to design a solution which will load-balance between the 2 IOM? Or we can leave it to Cisco UCSM to decide automatically?
I undertsand that I can check Enable Failover using UCSManager to manullay select either Fabric A or Fabric B as the Primary Path and the other as Secondary in A-B (A is the Pri) or B-A (B as the Pri).
Please help me to help Cisco sell more UCS as the above is the burining questions of some of us.
Getting better understanding now. Excellent help from you.
Assuming I create 1 service profile with the following:
Adapter 1 as seen within UCSM
vHBA-A- Fabric A - Is this 4GB as of now or can we treat it as 10G Port too likes vNIC?
Depends on the Mezz card. M71/M81 have 4GB FC chipsets. M72KR uses an 8GB FC chip.
vHBA-B- Fabric B - Same as above
vNIC-A-Fabric A-This is 10G port, for sure, right.
vNIC-B-Fabric B-Same as above
For VMware vDS setup, say for vMotion/Service Console to have Active and Failover/Redundant vmnic, should I team the 2 vNIC-A and vNIC-B or
I should CREATE another Adapter and team the 2 ports or 1 port here with Adapter 1?
Depending on which adapter you're using, you can create max to 2 NICs (M71KR/M72KR) or up to 56 NICs (M81KR). If you can only create a max of 2 NICs you'll need to use both NICs as uplinks to your vDS - both will be active. With Palo (M81KR)
It is creating a lot of confusion for non-Cisco Blade folks even from VMware and me too here as "physically" it is still only 1 M81KR with Dual-Ports for vHBA and vNIC alike???
The value add for the M81 (Palo) is you're able to create multiple virtual NICs/HBAs which can all be treated individually (VLANs, QoS, Security, Stat Counters etc). You are correct that you're still limited to two phsyical underlying NICs on each blade - where your design questions come into play is how you want to manage the behavior & performance of each NIC.
Can you please throw some light into it as I think it is all in your head?
You have done a great job in enlightening me and the rest.