A network engineer needs to upgrade the EPLDs of the fabric modules for a Cisco MDS director-class switch. In which order are components reloaded during the process?
A.
one fabric module at the time
B.
all fabric modules followed by the entire switching platform
A: One fabric module at a time
Explanation:
When performing an EPLD (Erasable Programmable Logic Device) upgrade on a Cisco MDS director-class switch, it's essential to upgrade one fabric module at a time. This approach ensures that the switch can continue operating with reduced capacity, maintaining data flow through the remaining active modules. Upgrading all fabric modules simultaneously would lead to a complete loss of data forwarding capability during the upgrade, resulting in significant downtime. Therefore, upgrading one fabric module at a time is the recommended practice to maintain operational stability during the upgrade process.
“For the Cisco MDS 9700 Series of switches, use the install all epld uri parallel xbar-module slot command to update EPLD images on the fabric modules. This process reloads the updated module. To ensure that the data traffic performance is not affected while the module is reloading, check the fabric bandwidth utilization by using the show hardware fabric-utilization detail command. If there is adequate reserve fabric bandwidth available before the update starts, the update will be nondisruptive.
On the Cisco MDS 9513 Multilayer Director switch, there is no command to directly update the fabric module EPLD. The fabric module EPLD is updated as part of the corresponding supervisor module EPLD update; that is, fabric module 1 is updated as part of the slot 7 supervisor module update, and fabric module 2 is updated as part of the slot 8 supervisor module update.”
The question is not clear, as option A is valid for MDS 9700 series and D is valid for MDS 9513 director switch.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#91276
With Director, modules are upgraded with supervisors
From official Cert Guide Book p502
"On the Cisco MDS 9513 Multilayer Director switch, there is no command to directly update
the fabric module EPLD. The fabric module EPLD is updated as part of the corresponding
supervisor module EPLD update; that is, fabric module 1 is updated as part of the slot 7
supervisor module update, and fabric module 2 is updated as part of the slot 8 supervisor
module update."
I think correct answer is A.
The Cisco MDS 9700 Series and Cisco MDS 9513 director-class switch have dedicated fabric modules. These modules contain EPLDs, which can be upgraded. All other Cisco MDS switches do not have these modules, so this process is not applicable for them
For the Cisco MDS 9700 Series of switches, use the install all epld uri parallel xbar-module
slot command to update EPLD images on the fabric modules. This process reloads the
updated module.
On the Cisco MDS 9513 Multilayer Director switch, there is no command to directly update
the fabric module EPLD. The fabric module EPLD is updated as part of the corresponding
supervisor module EPLD update; that is, fabric module 1 is updated as part of the slot 7
supervisor module update, and fabric module 2 is updated as part of the slot 8 supervisor
module update.
D only seems right for MDS 9513
The question is asking about director class MDS switches, which have redundant supervisors. Answer D is correct.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#62980
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#pgfId-138014
On the Cisco MDS 9513 director switch, there is no command to directly update the fabric module EPLD. The fabric module
EPLD is updated as part of the corresponding supervisor module EPLD update, that is, fabric module 1 is updated as part of the slot 7 supervisor module update, and fabric module 2 is updated as part of the slot 8 supervisor module update.
For information about how to update Cisco MDS 9513 supervisor modules, see “Installing Supervisor Module EPLDs” section.
An EPLD update of the supervisor module of fabric switches (Cisco MDS 9100, Cisco MDS 9200, and Cisco MDS 9300 Series switches) is disruptive since there is no redundant supervisor to take over while the update is in progress.
There is no redundant supervisor for these MDS switches so option D is not appplicable.
A looks good.
Wrong!, MDS Director class switches DO HAVE redundant supervisors. The question is asking about director class MDS switches. Answer D is correct.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#62980
A network engineer needs to upgrade the EPLDs of the FABRIC MODULES for a Cisco MDS director-class switch, I believe the question is asking about Fabric Module upgrade in a MDS Director-Class switch.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#91276
Agree, Answer is A.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/release_notes/epld/epld_rn_8_4_1a.html#pgfId-321469
"To update all EPLDs sequentially with a single command, use the install all epld command with the module all fan-module all xbar all options. After each module is upgraded, it is power cycled to load the EPLD update."
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html#pgfId-143905
To ensure that the data traffic performance is not affected while the module is reloading, check the fabric bandwidth utilization by using the show hardware fabric-utilization detail command
==> implies that not all are reloaded at the same time
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