Half the width of the blade of bandwidth and IOM

Hi, gurus from Cisco:

I read that Cisco series B width blade has a total bandwidth of 20 GB, can I looking for answers by authorities of this forum?

Example:

2 FInterconnect IOM/2 with 8 blades half-width in UCS 5108 Chassis-2 server links by IOM-left and the other 2 links on the right server IOM

Q1.

With the above configuration, what fabric or IOM is used, A or B?

Static pinning

Server Blade/link 1 Slot 1,3,5,7---qui IOM will be used for these blades?

Server Blade/link 2 Slot 2,4,6,8---qui IOM will be used for these blades?

Q2.

How to calculate the bandwidth of 20G in the Cisco documentation?

Q3.

If blade 1 o/s performs an i/o write request, said deterministically by the IOM (left of the chassis), if there is another reading of e/s issued by blade 1 once again, the I/O path passes by the IOM B(Right of Chassis) or by IOM to happen again? Here, no matter what algorithm to determine this?

Q4.

How to design a solution that will be to balance the load between the IOM 2? Or we can leave to Cisco UCSM decide automatically?

I undertsand that I can verify failover allow the use of UCSManager to manually select fabric or fabric B as the main way and the other as secondary in A - B (A is the Pri) or B - A B as the Pri.

Please help me help the UCS Cisco more than the foregoing is questions to the fire of some of us.

Thank you.

SIM

Inline.

ciscoucsisit wrote:

Rob:

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.

Yes

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.

Sim

Kind regards

Robert

Tags: Cisco DataCenter

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