Tag Archives: Nexus 5000

Integrating Dell Blade Servers into Cisco Nexus Environments

I recently had some discussions with a customer looking to connect a Dell EMC PowerEdge M1000e to a Cisco Nexus and I was quite surprised at the number of resources available to assist in the project.  Below you will find links to the documents I found with the hope it will help you out in the near future.

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(UPDATED) Officially Announced: IBM’s Nexus 4000 Switch: 4001I (PART 2)

I’ve gotten a lot of response from my first post, “REVEALED: IBM’s Nexus 4000 Switch: 4001I” and more information is coming out quickly so I decided to post a part 2. IBM officially announced the switch on October 20, 2009, so here’s some additional information:

  • The Nexus 4001I Switch for the IBM BladeCenter is part # 46M6071 and has a list price of $12,999 (U.S.) each
  • In order for the Nexus 4001I switch for the IBM BladeCenter to connect to an upstream FCoE switch, an additional software purchase is required. This item will be part # strong>49Y9983, “Software Upgrade License for Cisco Nexus 4001I.” This license upgrade allows for the Nexus 4001I to handle FCoE traffic. It has a U.S. list price of $3,899
  • The Cisco Nexus 4001I for the IBM BladeCenter will be compatible with the following blade server expansion cards
    • 2/4 Port Ethernet Expansion Card, part # 44W4479
    • NetXen 10Gb Ethernet Expansion Card, part # 39Y9271
    • Broadcom 2-port 10Gb Ethernet Exp. Card, part # 44W4466
    • Broadcom 4-port 10Gb Ethernet Exp. Card, part # 44W4465
    • Broadcom 10 Gb Gen 2 2-port Ethernet Exp. Card, part # 46M6168
    • Broadcom 10 Gb Gen 2 4-port Ethernet Exp. Card, part # 46M6164
    • QLogic 2-port 10Gb Converged Network Adapter, part # 42C1830
  • (UPDATED 10/22/09) The newly announced Emulex Virtual Adapter WILL NOT work with the Nexus 4001I IN VIRTUAL NIC (vNIC) mode.  It will work in pNIC mode according to IBM.

The Cisco Nexus 4001I switch for the IBM BladeCenter is a new approach to getting converged network traffic. As I posted a few weeks ago in my post, “How IBM’s BladeCenter works with BladeCenter H Diagram 6 x 10Gb UplinksCisco Nexus 5000” before the Nexus 4001I was announced, in order to get your blade servers to communicate with a Cisco Nexus 5000, you had to use a CNA,and a 10Gb Pass-Thru Module as shown on the left. The pass-thru module used in that solution requires for a direct connection to be made from the pass-thru module to the Cisco Nexus 5000 for every blade server that requires connectivity. This means for 14 blade servers, 14 connections are required to the Cisco Nexus 5000. This solution definitely works – it just eats up 14 Nexus 5000 ports. At $4,999 list (U.S.), plus the cost of the GBICs, the “pass-thru” scenario may be a good solution for budget conscious environments.

In comparison, with the IBM Nexus 4001I switch, we now can have as few as 1 uplink to the Cisco Nexus 5000 from the Nexus 4001I switch. This allows you to have more open ports on the Cisco Nexus 5000 for connections to other IBM Bladecenters with Nexus 4001I switches, or to allow connectivity from your rack based servers with CNAs.

Bottom line: the Cisco Nexus 4001I switch will reduce your port requirements on your Cisco Nexus 5000 or Nexus 7000 switch by allowing up to 14 servers to uplink via 1 port on the Nexus 4001I.

For more details on the IBM Nexus 4001I switch, I encourage you to go to the newly released IBM Redbook for the Nexus 4001I Switch.

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How IBM's BladeCenter works with Cisco Nexus 5000

Cisco Nexus 4000 switch for blade chassis environments, I thought it would be good to discuss how IBM is able to connect blade servers via 10Gb Datacenter Ethernet (or Converged Enhanced Ethernet) to a Cisco Nexus 5000.

Other than Cisco’s UCS offering, IBM is currently the only blade vendor who offers a Converged Network Adapter (CNA) for the blade server.  The 2 port CNA sits on the server in a PCI express slot and is mapped to high speed bays with CNA port #1 going to High Speed Bay #7 and CNA port #2 going to High Speed Bay #9.  Here’s an overview of the IBM BladeCenter H I/O Architecture (click to open large image:)

BladeCenter H I-O

Since the CNAs are only switched to I/O Bays 7 and 9, those are the only bays that require a “switch” for the converged traffic to leave the chassis.  At this time, the only option to get the converged traffic out of the IBM BladeCenter H is via a 10Gb “pass-thru” module.  A pass-thru module is not a switch – it just passes the signal through to the next layer, in this case the Cisco Nexus 5000. 

10 Gb Ethernet Pass-thru Module for IBM BladeCenter

10 Gb Ethernet Pass-thru Module for IBM BladeCenter

The pass-thru module is relatively inexpensive, however it requires a connection to the Nexus 5000 for every server that has a CNA installed.  As a reminder, the IBM BladeCenter H can hold up to 14 servers with CNAs installed so that would require 14 of the 20 ports on a Nexus 5010.  This is a small cost to pay, however to gain the 80% efficiency that 10Gb Datacenter Ethernet (or Converged Enhanced Ethernet) offers.  The overall architecture for the IBM Blade Server with CNA + IBM BladeCenter H + Cisco Nexus 5000 would look like this (click to open larger image:)

BladeCenter H Diagram 6 x 10Gb Uplinks

 

Hopefully when IBM announces their Cisco Nexus 4000 switch for the IBM BladeCenter H later this month, it will provide connectivity to CNAs on the IBM Blade server and it will help consolidate the amount of connections required to the Cisco Nexus 5000 from 14 to perhaps 6 connections ;) 

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