{"id":3517,"date":"2026-10-09T14:09:44","date_gmt":"2026-10-09T06:09:44","guid":{"rendered":"http:\/\/www.privilege55.com\/blog\/?p=3517"},"modified":"2026-10-09T14:09:44","modified_gmt":"2026-10-09T06:09:44","slug":"how-to-configure-flow-control-on-poe-2036p-42ba-8dde99","status":"publish","type":"post","link":"http:\/\/www.privilege55.com\/blog\/2026\/10\/09\/how-to-configure-flow-control-on-poe-2036p-42ba-8dde99\/","title":{"rendered":"How to configure flow control on POE – 2036P?"},"content":{"rendered":"

If you\u2019re reading this, chances are you\u2019re either a network engineer, IT manager, or someone tasked with keeping their PoE-powered devices running smoothly\u2014probably with the POE-2036P, our 24-port gigabit PoE+ switch that\u2019s become a go-to for small businesses, retail chains, and school campuses alike. Over the past five years as a supplier, I\u2019ve fielded hundreds of questions about configuring this switch, and one that comes up more than any other is flow control. Folks see lag in their IP cameras, dropped packets on their wireless access points, or strange latency spikes during peak hours, and they immediately wonder: can flow control fix this? And how do I set it up right? POE-2036P<\/a><\/p>\n

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I get it\u2014network settings can feel like navigating a maze when you\u2019re deep in a 9-to-5, juggling 10 different devices. Flow control isn\u2019t the most glamorous part of switch configuration, but done right, it prevents data congestion that crashes your whole network mid-shift. Let\u2019s break this down step by step, from what flow control actually is, to how to configure it on the POE-2036P, and the common mistakes I see users make every single time. No jargon overload, just real-world advice I\u2019ve learned from working directly with clients over the years.<\/p>\n

First, let\u2019s get the basics straight: What is flow control, and why does it matter for the POE-2036P? Imagine your network is a highway, and data packets are cars. During peak times\u2014like when all 24 IP cameras are uploading footage to a central NVR, or every employee is on a video call\u2014too many \u201ccars\u201d try to cram into the same \u201clane\u201d (a single port or switch internal buffer). Without flow control, those packets will just pile up, get dropped, or cause bottlenecks. Flow control is the stop-and-go system that tells a sending device: \u201cSlow down, my buffer is full right now\u2014wait a second before sending more.\u201d<\/p>\n

On the POE-2036P, we support two main types of flow control: IEEE 802.3x (which is the standard, per-port flow control for full-duplex links) and Priority-based Flow Control (PFC), which is more advanced for handling different types of traffic (like separating video data from email data so one doesn\u2019t swamp the other). A lot of new users only mess with 802.3x, but if you\u2019re running high-bandwidth devices, PFC is actually the game-changer. I\u2019ve seen this first-hand: a retail client with 16 POE cameras on their POE-2036P thought their switch was faulty because footage was lagging during store hours. After enabling PFC for the video VLAN, their latency dropped by 70% within an hour. That\u2019s the kind of win that makes flow control worth getting right.<\/p>\n

Now, let\u2019s talk about prerequisites before you even touch the configuration screen. I can\u2019t tell you how many times someone calls me up saying \u201cmy flow control isn\u2019t working\u201d and turns out they forgot a basic step: flow control has to be enabled on both the switch port and the connected device. If your POE-2036P port is set to send pause frames but your IP camera isn\u2019t configured to receive them, those pause frames just disappear into the ether, and you still get dropped packets. So first, confirm that all connected devices (wireless APs, cameras, VoIP phones, whatever) have their flow control enabled too. Most modern devices do this by default, but older ones or cheap no-name models sometimes don\u2019t\u2014double-check their user manuals if you\u2019re seeing inconsistent results.<\/p>\n

Next, make sure your switch is running the latest firmware. This is non-negotiable. We push firmware updates for the POE-2036P every quarter, mostly to fix flow control glitches that pop up when we add new device compatibility. Last year, we had a batch of switches that had a bug where 802.3x pause frames weren\u2019t being sent properly on ports 17 through 24\u2014we fixed that in firmware version V2.1.4, so if you\u2019re running anything older than that, your flow control settings won\u2019t work as intended. You can check firmware status via the switch web interface under \u201cSystem Settings\u201d > \u201cFirmware Update,\u201d and if you need help updating, our support team walks you through it in 10 minutes flat.<\/p>\n

Okay, now the fun part: configuring flow control on the POE-2036P. Let\u2019s start with the most common, per-port 802.3x flow control, since that\u2019s what most users need first. I\u2019ll walk you through this using the web interface, which is the easiest way, rather than the command line\u2014no obscure CLI codes, just point-and-click.<\/p>\n

First, log into your POE-2036P\u2019s web interface. You\u2019ll find the IP address either on the switch label, or by scanning for it with a free tool like Advanced IP Scanner if you forgot it. Once logged in, navigate to the \u201cPort Configuration\u201d tab\u2014this is where all your individual port settings live. You\u2019ll see a list of 24 ports, labeled 1 through 24, along with their current speed, PoE status, and flow control setting.<\/p>\n

For each port you want to enable flow control on, click the \u201cEdit\u201d button next to that port. A pop-up window will open with settings for speed, duplex, and flow control. Under \u201cFlow Control,\u201d you\u2019ll have three options: Disabled, Rx Only, Tx Only, and Full (which is both Rx and Tx). Let me break what each of these does, because choosing the wrong one is a super common mistake. Disabled is obvious\u2014no flow control. Rx Only means the switch will listen for pause frames from the connected device, but won\u2019t send its own. Tx Only means the switch will send pause frames to the device if its buffer is full, but won\u2019t respond if the device sends a pause frame to it. Full is the right setting for almost all scenarios, because it\u2019s bidirectional: both the switch and the connected device can send and receive pause frames. The only time you don\u2019t want Full is if you have an older device that only supports unidirectional flow control\u2014check its manual, and if it only uses Tx, set your switch port to Rx Only, and vice versa.<\/p>\n

Once you select Full (or the right setting for your device), click \u201cSave.\u201d Now, repeat this for every port that has high-bandwidth devices connected\u2014like your camera ports, core network ports, and wireless AP ports. You don\u2019t need to enable flow control on ports connected to low-bandwidth devices like desktop PCs, because their data load is never high enough to cause congestion. Pro tip: I usually group my camera ports into a VLAN called \u201cVideo\u201d and my AP ports into \u201cWireless,\u201d so I can quickly enable flow control only on those ports instead of scrolling through all 24 every time I need to adjust something.<\/p>\n

Now, if you\u2019re running a larger network with lots of different traffic types, like a school with video conferencing, IP cameras, and VoIP phones, 802.3x might not be enough. That\u2019s where Priority-based Flow Control (PFC) comes in, and I recommend enabling this on your POE-2036P too\u2014it\u2019s even simpler than it sounds. PFC works by classifying traffic into different priority queues, so if one type of traffic (say, a big file download from a teacher\u2019s laptop) starts clogging the switch, it only slows down that specific queue, not the entire network. For schools, this means video calls won\u2019t drop because someone is downloading a movie, and for retail, cash register transactions won\u2019t lag because cameras are uploading footage.<\/p>\n

To enable PFC, go to the \u201cQoS\u201d (Quality of Service) tab on your POE-2036P\u2019s web interface, then select \u201cPriority-based Flow Control.\u201d First, you\u2019ll need to map your traffic types to 802.1p priority codes. Let\u2019s keep this simple: most users assign priority 5 to video (cameras, video calls), priority 4 to VoIP, priority 3 to critical network traffic, and priority 0 to regular data (email, downloads). Once you have your mapping set, check the box next to \u201cEnable PFC\u201d and select the priorities you want to apply PFC to. I almost always enable PFC for priorities 4 and 5, since those are the high-bandwidth, time-sensitive ones. Then, just like with 802.3x, you need to enable PFC on each connected device\u2019s port too\u2014most modern APs and cameras support PFC now, but again, double-check if you\u2019re using older hardware.<\/p>\n

Now, let\u2019s talk about common mistakes I see users make when configuring flow control on the POE-2036P, because fixing these is half the battle. First mistake: Enabling flow control on all 24 ports. I\u2019ve had a client call me panicking because their network got even laggier after enabling flow control everywhere\u2014turns out they turned it on for their 48-port uplink to their core router, which had the opposite effect. Flow control is for ports with high-speed, short-distance links; uplinks to core routers shouldn\u2019t have flow control enabled, because it can cause bottlenecks across your entire network backbone. Stick to enabling it only on ports connecting your end devices (cameras, APs, VoIP phones).<\/p>\n

Second mistake: Forgetting to restart or reload the switch after changing flow control settings. A lot of users click \u201cSave\u201d and think they\u2019re done, but the POE-2036P sometimes requires a quick reload to apply flow control changes. I always tell users to save their settings, then go to \u201cSystem Tools\u201d > \u201cReboot Switch\u201d and select \u201cReboot Now\u201d to make sure all settings take effect. No more guessing if your change is active.<\/p>\n

Third mistake: Ignoring buffer size settings. The POE-2036P has built-in switch buffers, and if you set flow control but your buffer is too small, you\u2019ll still get dropped packets. You can adjust buffer size in the \u201cPort Configuration\u201d tab too\u2014for ports that handle video or VoIP, I recommend setting the buffer to 2MB per port, instead of the default 1MB. I had a warehouse client a year ago with 24 cameras; their buffer was set to default 1MB per port, so even with flow control, during shift changes, footage would drop. Increasing the buffer fixed that instantly.<\/p>\n

Another thing to note: Flow control isn\u2019t a fix for every network problem. If you\u2019re seeing latency, first check your cable length\u2014if you\u2019re using a 100-foot Cat5e cable, that\u2019s too long for gigabit PoE, and you\u2019ll get signal loss that looks like congestion. Or if you have too many devices on your network that aren\u2019t PoE-powered, you might need to upgrade to a higher-capacity switch. Flow control is a band-aid for congestion from data overload, not a cure-all for bad cabling or underpowered switches.<\/p>\n

Let me walk you through a real example to make this concrete. Last quarter, I worked with a small caf\u00e9 chain in downtown Austin that had 5 locations, each with a POE-2036P switch. They were getting complaints that during lunch rush, their point-of-sale (POS) systems would freeze for 10-15 seconds, and IP cameras would miss footage. Their IT guy tried everything: updating software, rebooting routers, replacing cables, but nothing worked. When I logged into their POE-2036P, I saw they had flow control disabled entirely, and all their camera ports were set to the default 1MB buffer. I enabled full 802.3x flow control on the 8 ports used for cameras and POS, increased their buffer to 2MB each, and enabled PFC for video and VoIP traffic. Within a week, they reported zero freezes at lunch, and their camera footage was consistent. That\u2019s exactly what flow control is supposed to do.<\/p>\n

If you\u2019re still confused about configuring flow control, don\u2019t overcomplicate it. Start with the basics: Enable 802.3x Full on only your high-bandwidth device ports, make sure both the switch and connected device have flow control on, update your firmware, and adjust buffer sizes if you\u2019re still seeing congestion. If you need more hands-on help, our team is here to walk you through it\u2014we\u2019ve supported thousands of POE-2036P users, and we don\u2019t do robotic support scripts, just real advice from people who sell, configure, and troubleshoot these switches every day.<\/p>\n

At the end of the day, the POE-2036P is a versatile switch that\u2019s built to handle small to medium networks, and flow control is one of the most powerful tools to get the most out of it. Whether you\u2019re running a retail store, school, or office, taking 15 minutes to set up flow control correctly will save you hours of troubleshooting down the line, and keep your critical devices running smoothly.<\/p>\n

<\/p>\n

If you\u2019re looking to upgrade your network with POE-2036P switches, or need help configuring flow control for your existing setup, reach out to our team to discuss your requirements and get a tailored solution. We\u2019re here to support your network, not just sell you hardware.<\/p>\n

25W<\/a> References<\/p>\n

    \n
  1. IEEE 802.3-2018, Standard for Ethernet, Clause 31: Media Access Control (MAC) Control Layer.<\/li>\n
  2. POE-2036P User Manual, Revision 2.1, 2023.<\/li>\n
  3. Cisco Small Business Switch Configuration Guide: Priority-Based Flow Control Implementation, 2022.<\/li>\n
  4. Network Congestion Management Best Practices for Gigabit PoE Switches, TechRepublic, 2024.<\/li>\n<\/ol>\n
    \n

    Shenzhen Jingangxia Technology Co., Ltd.<\/a>
    We are one of the most reliable poe-2036p manufacturers and suppliers in China, specialized in providing high quality customized service for global clients. Please rest assured to wholesale discount poe-2036p for sale here from our factory.
    Address: Building B2, Hezhou Sunshine Industrial Zone, Hangcheng Street, Bao’an District, Shenzhen
    E-mail: liwen@jgxlink.com
    WebSite:     https:\/\/www.upsdcpower.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you\u2019re reading this, chances are you\u2019re either a network engineer, IT manager, or someone tasked … How to configure flow control on POE – 2036P?<\/span>Read more<\/a><\/p>\n","protected":false},"author":59,"featured_media":3517,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3480],"class_list":["post-3517","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-poe-2036p-4aac-8e238a"],"_links":{"self":[{"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/posts\/3517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/comments?post=3517"}],"version-history":[{"count":0,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/posts\/3517\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/posts\/3517"}],"wp:attachment":[{"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/media?parent=3517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/categories?post=3517"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.privilege55.com\/blog\/wp-json\/wp\/v2\/tags?post=3517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}