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- About Walter Dey
03-26-2019
Walter Dey
Advocate
PhD in High Energy Physics (ETH Zurich, CERN Geneva)
10 years Consulting Engineer Digital Equipment Corp.
16 years Distinguished Systems Engineer Cisco EMEA
Work as freelancer after retirement
Awards
3
Recent Badges
Stats
Member since
06-05-2004
2886
Posts
1722
Helpful
346
Solutions
Created by
Walter Dey
in Storage Networking
in Storage Networking
01-01-2019
12:17 PM
01-01-2019
12:17 PM
Don't know the answer.
Is your MDS model supported, according to
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/programmability/cisco_mds9000_programmability_guide_8x/cisco_mds9000_programmability_guide_8x_chapter_011.html
Python is supported on the following Cisco MDS 9000 Series Switches:
Cisco MDS 9700 Series Switches
All Fibre Channel Switching Modules
Cisco MDS 9132T Multilayer Fabric Switch
Cisco MDS 9148T Multilayer Fabric Switch
Cisco MDS 9396T Multilayer Fabric Switch
... View more
01-01-2019
12:05 PM
1.I think understand, xxx all three are logged in, right?
yes, zone xxx has 3 members, which have done successful flogin, and the FCID is shown 2.Does yyy show 2 wwn's not logged in?
yes ! * means successful flogin, and results in a FCID !
3.If 2 is right, FCID should be logged in, what is the star showing me? Seems redundant.
yes ! 4.Is there a reference? Google is PAINFUL on this, same Cisco docs over and over.
see eg. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/zone.html
Displaying Zone Information
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
12-06-2018
11:30 AM
12-06-2018
11:30 AM
VSAN 1 is the embedded VSAN, used internally for house keeping traffic.
You also know, that any physical or Logical interface is by default in VSAN 1.
Therefore any productive interface (physical or Logical) should be move to a VSAN =/ 1.
If everything is in VSAN 1, you have no clue which interfaces are in use, which ones are idle.
Anyway, in a dual fabric setup, you should have 2 different VSAN's, e.g. even for fabric A, and odd for fabric B.
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
12-06-2018
07:26 AM
12-06-2018
07:26 AM
If you create the new zone, and add this zone to the zoneset, without zoneset activation, and copy run start is ok !
However a reboot of the switch would activate the modified zoneset !
Don't use VSAN 1 !
Instead of using fcalias, I would highly recommend to use device alias.
Don't understand why you like to postpone the activation ?
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
12-06-2018
07:14 AM
12-06-2018
07:14 AM
Although there is a interop mode allowing the interconnection, it will create all Kinds of challenges, eg. non matching functionality, tested interoperability on either side, Firmware upgrade that could break any working setup.
Ask the field for references ! I could not give you a single one ?
The advice to set the Brocade in NPV mode connecting to MDS in NPIV mode means totally redesigning the fabric (disruptive).
As a temporary solution: one Brocade fabric and a separate MDS fabric ? Operational cost ??
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
11-10-2018
02:27 AM
11-10-2018
02:27 AM
Are you using iSCSI, CIFS, NFS ? eg. TCP/IP, or UDP ?
What is the application where you expect this high performance ?
Did you test with traceroute and ping, to verify that Jumbo frames are end to end.
check the counters to see if you have TCP retransmissions, or fragementations.
As a reference, I would always first use standard 1500 B frame size. Not every application will gain performance with jumbo frames (Maybe backup does).
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
11-10-2018
02:18 AM
11-10-2018
02:18 AM
What is the peer, that is connected to this fc port ?
The port is in VSAN 1, which is the default. (you should never use VSAN 1 for any operational ports, create new VSAN's and move the fc ports accordingly.
Do you see any error log entries (show logging log)
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-08-2018
04:59 AM
11-08-2018
04:59 AM
Regarding device alias, see eg.
https://blog.scottlowe.org/2010/12/08/using-device-aliases-on-a-cisco-mds/
https://community.cisco.com/t5/storage-networking/fcalias-or-device-alias/td-p/1702249
https://community.cisco.com/t5/storage-networking/what-is-the-difference-between-quot-fcalias-quot-quot-device/td-p/1080710
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-08-2018
12:14 AM
11-08-2018
12:14 AM
This document might be useful: https://cdn.cnetcontent.com/5a/1f/5a1f3f3e-d3a0-49c8-bbf9-88676f31ea2d.pdf
Cisco UCS B-Series Blade Servers Windows Installation Guide
First Published: April 22, 2011
Last Modified: March 20, 2015
Why are you using fcalias ? I would use device alias ?
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-07-2018
11:49 PM
11-07-2018
11:49 PM
Thanks !
Do you see the flogi ( pwwn ) of the vhba which should initiate the boot ? is the vhba in vsan 10 resp. 20 ?
And please show me the corresponding zone and zoneset.
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-06-2018
06:44 AM
11-06-2018
06:44 AM
Zone WWPN of HBA 1 with MDS-A and WWPN of HBA 2 with MDS-B (Both Initiators have registered within SAN)
do you also have a zone with the vhba pwwn and the storage pwwn….
please provide the following information from both MDS
- show fcns database vsan xyz
- show flogi database vsan xyz
plus all the zone, zoneset information for this UCS vhba and the storage system.
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-06-2018
06:35 AM
11-06-2018
06:35 AM
Hi
Is your VSAN configuration correct ? eg. are the vhba in the proper VSAN ? do you see on the switch the flogi / fcns for the proper VSAN ?
... View more
Created by
Walter Dey
in Storage Networking
in Storage Networking
11-04-2018
06:50 AM
11-04-2018
06:50 AM
device-alias supports pwwn; therefore it's a additional very useful feature (eg. vsan indep., zoning can be done without knowing the exact pwwn, pwwn can change without changing zoning,.....).
I never claimed that device-alias is a prereq. for smart zoning.
... View more
11-04-2018
06:40 AM
There are SFP's LW for single mode, long distance; question however is certification by hba Vendor, storage Vendor, and interop with switch Vendor:
https://www.flexoptix.net/de/supported-vendors/index/name/QLogic-compatible
... View more
Created by
Walter Dey
in Unified Computing System Discussions
in Unified Computing System Discussions
11-04-2018
06:26 AM
11-04-2018
06:26 AM
If you clone your service profile, you will most likely get new (and therefore different) pwwn, nwwn for your vhba ! and this also requires additional zoning entry !
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ts/guide/UCSTroubleshooting/UCSTroubleshooting_chapter_0110.html
https://community.cisco.com/t5/data-center-documents/troubleshooting-boot-from-san-installation/ta-p/3155048
... View more
Created by
Walter Dey
in Storage Networking
01-01-2019
01-01-2019
Don't know the answer. Is your MDS model supported, according to
https://www.cisco.com/c/en/us/td/do...
01-01-2019
1.I think understand, xxx all three are logged in, right? yes, zone xxx
has 3 members, which have do...
Created by
Walter Dey
in Storage Networking
12-06-2018
12-06-2018
VSAN 1 is the embedded VSAN, used internally for house keeping traffic.
You also know, that any phys...
Created by
Walter Dey
in Storage Networking
12-06-2018
12-06-2018
If you create the new zone, and add this zone to the zoneset, without
zoneset activation, and copy r...
Created by
Walter Dey
in Storage Networking
12-06-2018
12-06-2018
Although there is a interop mode allowing the interconnection, it will
create all Kinds of challenge...
Created by
Walter Dey
in Storage Networking
11-10-2018
11-10-2018
Are you using iSCSI, CIFS, NFS ? eg. TCP/IP, or UDP ? What is the
application where you expect this ...
Created by
Walter Dey
in Storage Networking
11-10-2018
11-10-2018
What is the peer, that is connected to this fc port ? The port is in
VSAN 1, which is the default. (...
Created by
Walter Dey
in Unified Computing System Discussions
11-08-2018
11-08-2018
Regarding device alias, see eg.
https://blog.scottlowe.org/2010/12/08/using-device-aliases-on-a-cisc...
Created by
Walter Dey
in Unified Computing System Discussions
11-08-2018
11-08-2018
This document might be useful:
https://cdn.cnetcontent.com/5a/1f/5a1f3f3e-d3a0-49c8-bbf9-88676f31ea2...
Created by
Walter Dey
in Unified Computing System Discussions
11-07-2018
11-07-2018
Thanks ! Do you see the flogi ( pwwn ) of the vhba which should initiate
the boot ? is the vhba in v...
Created by
Walter Dey
in Unified Computing System Discussions
11-06-2018
11-06-2018
Zone WWPN of HBA 1 with MDS-A and WWPN of HBA 2 with MDS-B (Both
Initiators have registered within S...
Created by
Walter Dey
in Unified Computing System Discussions
11-06-2018
11-06-2018
Hi Is your VSAN configuration correct ? eg. are the vhba in the proper
VSAN ? do you see on the swit...
11-04-2018
device-alias supports pwwn; therefore it's a additional very useful
feature (eg. vsan indep., zoning...
11-04-2018
There are SFP's LW for single mode, long distance; question however is
certification by hba Vendor, ...
Created by
Walter Dey
in Unified Computing System Discussions
11-04-2018
11-04-2018
If you clone your service profile, you will most likely get new (and
therefore different) pwwn, nwwn...
Public Statistics
| Date Registered | 06-05-2004 02:40 AM |
| Date Last Visited | 03-26-2019 12:33 AM |
| Total Messages Posted | 2,886 |
| Total Helpful Votes Received | 1722 |
Awards
Cisco Designated VIPs
2017 Storage Networking Unified Computing
Cisco Designated VIPs
2016 Unified Computing
Cisco Designated VIPs
2015 Storage Networking Unified Computing
