Re: [PLUG] switch with Fast Boot PoE
I have no idea if this helps at all, but there are a variety of Realtek rtl838x-based switches that run OpenWrt. I have a Netgear GS108Tv3, which doesn't have PoE, but I *believe* some of them do, e.g. perhaps the Zyxel GS1900-8HP v2. Presumably, the PoE state is controlled from gpio's. I imagine it *might* be possible to hack the bootloader to set the GPIOs to enable PoE before the full boot has finished. On Mon, Mar 21, 2022 at 9:58 AM Galen Seitz wrote: > > Hi, > > Thanks for the PoE switch suggestions. It looks like Extreme Networks > (X435-8P-4S) and Juniper might actually have some non-astronomically > priced switches that would do what we want. Netgear has some switches > (GS110TUP and GS710TUP) with a feature they call Uninterrupted PoE, > which seems to be the same as Cisco's Perpetual PoE. Unfortunately the > user's manual doesn't mention anything about a fast boot feature. > Whatever we end up choosing, we will probably need to get a device in > our hands to really know for certain whether it is going to work for us. > In the next few years I expect that the Perpetual and Fast Boot PoE > features will migrate down to more SOHO products. > > Regarding the suggestion of PoE injection, I should have mentioned that > we have a minimum of 8 PoE devices, so using injection would be pretty > ugly from a cabling perspective. Thanks for the idea though. > > galen > -- > Galen Seitz > gal...@seitzassoc.com
Re: [PLUG] switch with Fast Boot PoE
On Mon, 2022-03-21 at 09:58 -0700, Galen Seitz wrote: > Hi, > > Thanks for the PoE switch suggestions. It looks like Extreme > Networks > (X435-8P-4S) and Juniper might actually have some non-astronomically > priced switches that would do what we want. Netgear has some > switches > (GS110TUP and GS710TUP) with a feature they call Uninterrupted PoE, > which seems to be the same as Cisco's Perpetual PoE. Unfortunately > the > user's manual doesn't mention anything about a fast boot feature. > Whatever we end up choosing, we will probably need to get a device > in > our hands to really know for certain whether it is going to work for > us. > In the next few years I expect that the Perpetual and Fast Boot > PoE > features will migrate down to more SOHO products. > > Regarding the suggestion of PoE injection, I should have mentioned > that > we have a minimum of 8 PoE devices, so using injection would be > pretty > ugly from a cabling perspective. Thanks for the idea though. > I guess that you are looking exclusively at switches to do power management for you, so this maybe just a distraction. There are also multiport POE injectors like these ones: https://www.amazon.com/dp/B01JHXX066/ref=sspa_dk_detail_0?psc=1&pd_rd_i =B01JHXX066&pd_rd_w=TNjxv&pf_rd_p=d533dd31-f352-432f-87d0- ace6fec162b4&pd_rd_wg=SD5uh&pf_rd_r=SXKQWKK2G3JT2PMD4K0D&pd_rd_r=7c5008 cd-189c-4572-9051- 69dc138fadb1&s=pc&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUE5MTlCSjk5RE5MOVQmZW5j cnlwdGVkSWQ9QTEwMTU1MTAxQUc4V1lWRTE1SVBIJmVuY3J5cHRlZEFkSWQ9QTA2ODExNTV BQVIxVVQyVFY3UDQmd2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWMmYWN0aW9uPWNsaW NrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl https://www.amazon.com/dp/B01IODMBRY/ref=sspa_dk_detail_2?psc=1&pd_rd_i =B01IODMBRY&pd_rd_w=TNjxv&pf_rd_p=d533dd31-f352-432f-87d0- ace6fec162b4&pd_rd_wg=SD5uh&pf_rd_r=SXKQWKK2G3JT2PMD4K0D&pd_rd_r=7c5008 cd-189c-4572-9051- 69dc138fadb1&s=pc&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUE5MTlCSjk5RE5MOVQmZW5j cnlwdGVkSWQ9QTEwMTU1MTAxQUc4V1lWRTE1SVBIJmVuY3J5cHRlZEFkSWQ9QTAzOTA5MDA zSzBMMExWOTYwNkdCJndpZGdldE5hbWU9c3BfZGV0YWlsX3RoZW1hdGljJmFjdGlvbj1jbG lja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ== I would not bet on perpetual POE to trickle down - it feels like "kind of" niche to have POE with the switch not switching. -T
Re: [PLUG] switch with Fast Boot PoE
Hi, Thanks for the PoE switch suggestions. It looks like Extreme Networks (X435-8P-4S) and Juniper might actually have some non-astronomically priced switches that would do what we want. Netgear has some switches (GS110TUP and GS710TUP) with a feature they call Uninterrupted PoE, which seems to be the same as Cisco's Perpetual PoE. Unfortunately the user's manual doesn't mention anything about a fast boot feature. Whatever we end up choosing, we will probably need to get a device in our hands to really know for certain whether it is going to work for us. In the next few years I expect that the Perpetual and Fast Boot PoE features will migrate down to more SOHO products. Regarding the suggestion of PoE injection, I should have mentioned that we have a minimum of 8 PoE devices, so using injection would be pretty ugly from a cabling perspective. Thanks for the idea though. galen -- Galen Seitz gal...@seitzassoc.com
Re: [PLUG] switch with Fast Boot PoE
On Fri, Mar 18, 2022 at 11:38 AM Galen Seitz wrote: > Hi, > > For a project I'm working on we have a need for a switch with PoE+ that > will power the ports quickly, say less than 15 seconds after power up. > The switch that is currently specified is a Cisco cbs250-16P-2g. This > switch takes at least a minute, if not more, to enable power to the > ports. With a bit of searching I discovered that some Cisco switches > have a pair of features called Perpetual PoE and Fast Boot PoE. We > don't have a need for Perpetual PoE, but Fast Boot PoE seems to fit our > needs. Some other vendors have a similar sounding feature. So far I > have only seen this offered on higher end switches(Cisco, Juniper, > etc.). Does anyone know of any switches that are more in the SOHO class > that have this type of feature? > > Note that we need some management features available via telnet, so this > precludes using an unmanaged switch. > > thanks, > galen > -- > Galen Seitz > gal...@seitzassoc.com > >From your request, I am suspecting you have some devices powered by PoE that you need active on the network as soon as possible, like maybe a radio or something. How about using whatever favorite switch works for you otherwise, and putting a PoE injector in the line going to your devices needing immediate power? They would then actually be powered all the time, regardless of the switch status. You may need to turn PoE off on the switch ports you have an external injector on. Sure, it adds a little hardware complexity, but I think it will provide the functionality you are looking for. Michael
Re: [PLUG] switch with Fast Boot PoE
On Fri, 18 Mar 2022, Galen Seitz wrote: Hi, For a project I'm working on we have a need for a switch with PoE+ that will power the ports quickly, say less than 15 seconds after power up. The switch that is currently specified is a Cisco cbs250-16P-2g. This switch takes at least a minute, if not more, to enable power to the ports. With a bit of searching I discovered that some Cisco switches have a pair of features called Perpetual PoE and Fast Boot PoE. We don't have a need for Perpetual PoE, but Fast Boot PoE seems to fit our needs. Some other vendors have a similar sounding feature. So far I have only seen this offered on higher end switches(Cisco, Juniper, etc.). Does anyone know of any switches that are more in the SOHO class that have this type of feature? I had pretty good luck with Netgear ProSafe PoE; the model I used was GS724TP. It's managed and definitely SOHO. I have no distinct memory of time-to-power, but I don't recall long waits. I cannot find any specs in a quick Google search, but that line might be worth investigating. -- Paul Heinlein heinl...@madboa.com 45°22'48" N, 122°35'36" W
Re: [PLUG] switch with Fast Boot PoE
I cannot test it - my POE+ switch is remote to me - so I cannot measure time to power. That said when setting it up - I have pretty strong feeling that the power came instantaneously (1 sec or less) with this cheap switch: https://www.amazon.com/NETGEAR-5-Port-Gigabit-Ethernet-Unmanaged/dp/B08 LHL1Q2Z/ref=sr_1_2_sspa?crid=HIGJCU14KW6Q&keywords=netgear%2Bpoe%2Bswit ch%2B5%2Bport&qid=1647629616&sprefix=netgear%2Bpoe%2Caps%2C87&sr=8-2- spons&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRU9JSEhGQU1CRzUxJmVuY3J5cHRlZElk PUEwNzA4NDc4MlQxSDZPTk9EVUg2NyZlbmNyeXB0ZWRBZElkPUEwMDc4NDgzNFJBVjNRUTB LVlZZJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2 xpY2s9dHJ1ZQ&th=1 They have managed version for about 2x$$ as well as POE++ for about $60-ish I cannot say anything negative about it. -Tomas PS: Wish I could get UBNT version for similar $$. I do have UBNT POE+, but they are more expensive, take about half minute to boot (not sure if the power comes out faster) and are unobtainable these days - so not really useful to you right now. On Fri, 2022-03-18 at 11:38 -0700, Galen Seitz wrote: > Hi, > > For a project I'm working on we have a need for a switch with PoE+ > that > will power the ports quickly, say less than 15 seconds after power > up. > The switch that is currently specified is a Cisco cbs250-16P-2g. > This > switch takes at least a minute, if not more, to enable power to the > ports. With a bit of searching I discovered that some Cisco > switches > have a pair of features called Perpetual PoE and Fast Boot PoE. We > don't have a need for Perpetual PoE, but Fast Boot PoE seems to fit > our > needs. Some other vendors have a similar sounding feature. So far > I > have only seen this offered on higher end switches(Cisco, Juniper, > etc.). Does anyone know of any switches that are more in the SOHO > class > that have this type of feature? > > Note that we need some management features available via telnet, so > this > precludes using an unmanaged switch. > > thanks, > galen
