Comware

I'm going to be powering a bunch of stuff for our security system off of Aruba 2930Fs.  I'm a little confused about the total PoE budget that is available to the 2930F.  The PoE information on the switch itself says "Maximum Power 370W" but it also has a usage threshold of 80%.  So is the 370W after the 80% usage threshold or is the actual threshold more like 296W (80% of 370).  My current plans have 1 switch that needs to supply 309W of power, so that's why I need this clarified for me.  If the actual budget is only 296W, than I've got to make other decisions.

Thanks in advance! 

Hi,

for me "security-stuff" should not run on any "F"-Variant of switch. I'd prefer "M"-Models because of redundancy in Power-Supply. Also I prefer running those on two switches so if one fails, i'd still have one half running.

My suggestion ist two cx6300m in VSF-mode, as those can be updated without any reboot for the next 3 years (Software cx 10.13.xxxx as this is a LSR - Longterm-Service-Release). I use the same for many S5/S7 controls by Siemens as the update-process means NO/ZERO/NULL impact on the DATA-plane. Also a good feature for "security-related stuff".

If a switch-change is not an option, then i'd prefer having a second switch for redundancy. With or without VSF. Probably without, as this would allow firmware-update with only loss of 50% of the ports.

This will allow you to balance the poe load on both devices and you will be safe (also for future growth).

Are those 309W the real (measured) load, or is this only the maximum load? If it is maximum load, you are OK with one switch, if this is continuous load, i'd opt for the second switch.

Greetings

Franz

I'm going to be powering a bunch of stuff for our security system off of Aruba 2930Fs.  I'm a little confused about the total PoE budget that is available to the 2930F.  The PoE information on the switch itself says "Maximum Power 370W" but it also has a usage threshold of 80%.  So is the 370W after the 80% usage threshold or is the actual threshold more like 296W (80% of 370).  My current plans have 1 switch that needs to supply 309W of power, so that's why I need this clarified for me.  If the actual budget is only 296W, than I've got to make other decisions.

Thanks in advance! 

I don't have any option in the switch.  We are using them because we had them sitting around not being used.  
As far as "actual" load vs budgeted load, that's another question.  What I'm thinking I'm going to see is about 25 door controllers pulling 5W, so only 125W.  Easy peasy.  Problem is, those same controllers are going to request a budget of 30W (even though they only use 5).  So my "budget" is going to be 750W but only using 125W.  Even if I split that into 2 switches, 13 controllers on 1 switch is going to request a budget of 390W.  Not quite sure that I'm going to be able to pull it off unless I can override the budget somehow.

Hi,

for me "security-stuff" should not run on any "F"-Variant of switch. I'd prefer "M"-Models because of redundancy in Power-Supply. Also I prefer running those on two switches so if one fails, i'd still have one half running.

My suggestion ist two cx6300m in VSF-mode, as those can be updated without any reboot for the next 3 years (Software cx 10.13.xxxx as this is a LSR - Longterm-Service-Release). I use the same for many S5/S7 controls by Siemens as the update-process means NO/ZERO/NULL impact on the DATA-plane. Also a good feature for "security-related stuff".

If a switch-change is not an option, then i'd prefer having a second switch for redundancy. With or without VSF. Probably without, as this would allow firmware-update with only loss of 50% of the ports.

This will allow you to balance the poe load on both devices and you will be safe (also for future growth).

Are those 309W the real (measured) load, or is this only the maximum load? If it is maximum load, you are OK with one switch, if this is continuous load, i'd opt for the second switch.

Greetings

Franz

I'm going to be powering a bunch of stuff for our security system off of Aruba 2930Fs.  I'm a little confused about the total PoE budget that is available to the 2930F.  The PoE information on the switch itself says "Maximum Power 370W" but it also has a usage threshold of 80%.  So is the 370W after the 80% usage threshold or is the actual threshold more like 296W (80% of 370).  My current plans have 1 switch that needs to supply 309W of power, so that's why I need this clarified for me.  If the actual budget is only 296W, than I've got to make other decisions.

Thanks in advance! 

So that is normally not the problem.

If you search the CLI-Guide you will find the "power"-section in the Interface-Context.

There you can manually override the reservations and the classes ;-)
This is tricky, but possible. Probably needs a little bit of trial and error.

But if possible just use at least 2 Switches if they are "laying around". Then everything should be fine.

Personally I'd just try it with 2 Switches without fingering around to much. Your time is more valuable then those switches.

I don't have any option in the switch.  We are using them because we had them sitting around not being used.  
As far as "actual" load vs budgeted load, that's another question.  What I'm thinking I'm going to see is about 25 door controllers pulling 5W, so only 125W.  Easy peasy.  Problem is, those same controllers are going to request a budget of 30W (even though they only use 5).  So my "budget" is going to be 750W but only using 125W.  Even if I split that into 2 switches, 13 controllers on 1 switch is going to request a budget of 390W.  Not quite sure that I'm going to be able to pull it off unless I can override the budget somehow.

Hi,

for me "security-stuff" should not run on any "F"-Variant of switch. I'd prefer "M"-Models because of redundancy in Power-Supply. Also I prefer running those on two switches so if one fails, i'd still have one half running.

My suggestion ist two cx6300m in VSF-mode, as those can be updated without any reboot for the next 3 years (Software cx 10.13.xxxx as this is a LSR - Longterm-Service-Release). I use the same for many S5/S7 controls by Siemens as the update-process means NO/ZERO/NULL impact on the DATA-plane. Also a good feature for "security-related stuff".

If a switch-change is not an option, then i'd prefer having a second switch for redundancy. With or without VSF. Probably without, as this would allow firmware-update with only loss of 50% of the ports.

This will allow you to balance the poe load on both devices and you will be safe (also for future growth).

Are those 309W the real (measured) load, or is this only the maximum load? If it is maximum load, you are OK with one switch, if this is continuous load, i'd opt for the second switch.

Greetings

Franz

I'm going to be powering a bunch of stuff for our security system off of Aruba 2930Fs.  I'm a little confused about the total PoE budget that is available to the 2930F.  The PoE information on the switch itself says "Maximum Power 370W" but it also has a usage threshold of 80%.  So is the 370W after the 80% usage threshold or is the actual threshold more like 296W (80% of 370).  My current plans have 1 switch that needs to supply 309W of power, so that's why I need this clarified for me.  If the actual budget is only 296W, than I've got to make other decisions.

Thanks in advance! 

So that is normally not the problem.

If you search the CLI-Guide you will find the "power"-section in the Interface-Context.

There you can manually override the reservations and the classes ;-)
This is tricky, but possible. Probably needs a little bit of trial and error.

But if possible just use at least 2 Switches if they are "laying around". Then everything should be fine.

Personally I'd just try it with 2 Switches without fingering around to much. Your time is more valuable then those switches.

------------------------------
prefers to not experiment with live customer equipment...

Original Message:
Sent: Sep 12, 2024 08:07 AM
From: kirby timm
Subject: Aruba 2930 actual PoE budget?

I don't have any option in the switch.  We are using them because we had them sitting around not being used.  
As far as "actual" load vs budgeted load, that's another question.  What I'm thinking I'm going to see is about 25 door controllers pulling 5W, so only 125W.  Easy peasy.  Problem is, those same controllers are going to request a budget of 30W (even though they only use 5).  So my "budget" is going to be 750W but only using 125W.  Even if I split that into 2 switches, 13 controllers on 1 switch is going to request a budget of 390W.  Not quite sure that I'm going to be able to pull it off unless I can override the budget somehow.

Original Message:
Sent: Sep 12, 2024 03:45 AM
From: FHegnauer
Subject: Aruba 2930 actual PoE budget?

Hi,

for me "security-stuff" should not run on any "F"-Variant of switch. I'd prefer "M"-Models because of redundancy in Power-Supply. Also I prefer running those on two switches so if one fails, i'd still have one half running.

My suggestion ist two cx6300m in VSF-mode, as those can be updated without any reboot for the next 3 years (Software cx 10.13.xxxx as this is a LSR - Longterm-Service-Release). I use the same for many S5/S7 controls by Siemens as the update-process means NO/ZERO/NULL impact on the DATA-plane. Also a good feature for "security-related stuff".

If a switch-change is not an option, then i'd prefer having a second switch for redundancy. With or without VSF. Probably without, as this would allow firmware-update with only loss of 50% of the ports.

This will allow you to balance the poe load on both devices and you will be safe (also for future growth).

Are those 309W the real (measured) load, or is this only the maximum load? If it is maximum load, you are OK with one switch, if this is continuous load, i'd opt for the second switch.

Greetings

Franz

------------------------------
prefers to not experiment with live customer equipment...

Original Message:
Sent: Sep 09, 2024 09:40 AM
From: ktimm@labconnect.com
Subject: Aruba 2930 actual PoE budget?

I'm going to be powering a bunch of stuff for our security system off of Aruba 2930Fs.  I'm a little confused about the total PoE budget that is available to the 2930F.  The PoE information on the switch itself says "Maximum Power 370W" but it also has a usage threshold of 80%.  So is the 370W after the 80% usage threshold or is the actual threshold more like 296W (80% of 370).  My current plans have 1 switch that needs to supply 309W of power, so that's why I need this clarified for me.  If the actual budget is only 296W, than I've got to make other decisions.

Thanks in advance!