Troubleshooting error-disabled issues between a Cisco UCS fabric interconnect and a Cisco MDS

Cisco MDS

When connecting a high speed cisco UCS Fabric Interconnect (like the 6454) to Cisco MDS Fibre Channel switches, you might encounter error-disabled ports causing the port-channel to go down. Specifically for 8 Gbps speeds you need to enter 1 additional command per port that’s participating in the port-channel:

int fc1/17
switchport fill-pattern IDLE speed 8000

For each fc port on the MDS you need to enter this command, followed by a “shut / no shut” and the error disabled problems are most likely gone.

Check to see the port config:

show run int fc1/17

Or whatever port you configured to use the fill-pattern.

Source: Cisco

How to upgrade a Cisco MDS SAN switch

Cisco MDS

After a few years of not having had to perform switch upgrades, I had to perform a few firmware upgrades on MDS switches. I decided to write down the steps I had to take:

  • First make sure you have a reachable ftp server somewhere and write down its ip address
  • Log on to the Cisco MDS SAN switch you need to upgrade
  • Make sure the bootflash: has enough available space to hold the 2 new files

# dir bootflash:

4096 Feb 23 14:58:04 2020 lost+found/
26049024 Feb 10 12:57:55 2020 m9100-s5ek9-kickstart-mz.8.3.2.bin
121121564 Feb 10 12:56:47 2020 m9100-s5ek9-mz.8.3.2.bin

Usage for bootflash://sup-local
463962112 bytes used
2894815232 bytes free
3358777344 bytes total

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I’m in Tech Field Day 22!

From Wednesday December 9 to Friday December 11 I’ll be a delegate in Tech Field Day 22. I attended once before, in San Jose in 2014, for Storage Field Day 5 and now, 6 years later I’m in #TFD22! Time sure flies! This week we’ll be talking to some interesting companies once again.

These are the presenting companies and the delegates that will be attending:

Wednesday Thursday Friday
Early Presenting Companies Commvault
Quantum
Veeam
Red Hat
VMware
Delegate Panel Arjan Timmerman, Bart Heungens, Bruno Wollmann, Jasper Bongertz, Kori Younger, Lino Telera, Max Mortillaro, Michael Davis, Ned Bellavance, Phillip Sellers, Rob Koper, Steven Cortez
Late Presenting Companies Cisco
MemVerge
Riverbed Illumio
Delegate Panel Al Rasheed, Ben Mason, Chris Hildebrandt, Chris Maki, David Chapa, Erik Ableson, Jody Lemoine, Justin WarrenMatt Callaway, Matthew LeibNico Stein, Robert Novak, Scott Bollinger

 

It’s going to be an interesting few days and I’m very much looking forward to a renewed participation in this TFD event!

 

For more detailed information, please visit the TechField Day website.

How to get a Brocade switch configured for Dell EMC SRS (ESRS)

Perform a

esrsconfig -show

to check whether the settings are saved to te switch. If the switch shows this output:

fcsw-01:admin> esrsconfig –show

ESRS SERVER AND PRODUCT CONFIGURATION
=======================================

ESRS Server IP: 10.20.30.40
ESRS Server Port: 9443
Product Serial Number: BRCCCD1946R04G
Product Model Number: SWITCH-BROCADE-B-GW
Status: Device is not Managed by ESRS

ESRS is not yet active.

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How to match an Windows (HyperV) disk to a SAN attached disk using the wwn

Hard Drive

Where do I find the wwn of a disk in Windows / HyperV? That’s the question.

There are a number of identifiers to find out which LUN is which disk, but the only undeniably unique number to find out which disk is which LUN is by using the globally unique wwn number of a LUN. The question is: “where can I find the wwn of a disk in HyperV?”

The LUN number, as assigned by the storage array can be found by using diskpart:

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