{"id":229,"date":"2026-07-10T14:00:09","date_gmt":"2026-07-10T14:00:09","guid":{"rendered":"https:\/\/kinhnghiemlamviec.com\/?p=229"},"modified":"2026-07-11T15:47:24","modified_gmt":"2026-07-11T15:47:24","slug":"huong-dan-chi-tiet-cach-lua-chon-switch-cho-he-thong-cctv-dap-ung-tai-200-camera","status":"publish","type":"post","link":"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/10\/huong-dan-chi-tiet-cach-lua-chon-switch-cho-he-thong-cctv-dap-ung-tai-200-camera\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera"},"content":{"rendered":"\n<p><strong>C\u00e1ch ch\u1ecdn Switch cho h\u1ec7 th\u1ed1ng CCTV<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng camera IP. Nhi\u1ec1u ng\u01b0\u1eddi ch\u1ec9 quan t\u00e2m \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng m\u1ea1ng c\u1ee7a switch m\u00e0 b\u1ecf qua c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 c\u00f4ng su\u1ea5t PoE, b\u0103ng th\u00f4ng uplink, Switching Capacity hay c\u00e1c t\u00ednh n\u0103ng Layer 2 v\u00e0 Layer 3.<\/p>\n\n\n\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd l\u1ea5y v\u00ed d\u1ee5 m\u1ed9t t\u00f2a nh\u00e0 <strong>10 t\u1ea7ng v\u1edbi kho\u1ea3ng 200 camera IP<\/strong> \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn <strong>c\u00e1ch l\u1ef1a ch\u1ecdn Switch Access v\u00e0 Switch Core<\/strong> ph\u00f9 h\u1ee3p. \u0110\u1ed3ng th\u1eddi, b\u00e0i vi\u1ebft c\u0169ng s\u1ebd chia s\u1ebb kinh nghi\u1ec7m t\u00ednh s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng, c\u00f4ng su\u1ea5t PoE, l\u1ef1a ch\u1ecdn c\u1ed5ng RJ45 ho\u1eb7c SFP, t\u00ednh b\u0103ng th\u00f4ng uplink v\u00e0 c\u00e1ch ch\u1ecdn switch \u0111\u00e1p \u1ee9ng nhu c\u1ea7u hi\u1ec7n t\u1ea1i c\u0169ng nh\u01b0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<p>\u0110\u1ec3 minh h\u1ecda, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng c\u00e1c d\u00f2ng <strong>Aruba Instant On 1930<\/strong> v\u00e0 <strong>Aruba Instant On 1960<\/strong>, \u0111\u00e2y l\u00e0 hai d\u00f2ng switch ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng CCTV quy m\u00f4 v\u1eeba v\u00e0 nh\u1ecf.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-opt-id=564975921  fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:1024\/h:683\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png\" alt=\"m\u00f4 h\u00ecnh h\u1ec7 th\u1ed1ng 200 camera\" class=\"wp-image-249\" srcset=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:1024\/h:683\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 1024w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:300\/h:200\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 300w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:768\/h:512\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 768w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:1300\/h:867\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 1300w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:800\/h:533\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 800w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:CTPq.cf\/w:1536\/h:1024\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/Mohinhcamera-1.png 1536w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng camera v\u00e0 v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t<\/h2>\n\n\n\n<p>\u0110\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t. V\u00ed d\u1ee5: ch\u00fang ta c\u00f3 200 Camera, b\u1ed1 tr\u00ed \u1edf 10 t\u1ea7ng v\u1edbi m\u1ed7i t\u1ea7ng kho\u1ea3ng 20 camera.<br>Thay v\u00ec s\u1eed d\u1ee5ng m\u1ed9t switch l\u1edbn cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng, ch\u00fang ta n\u00ean chia th\u00e0nh nhi\u1ec1u switch Access \u0111\u1eb7t g\u1ea7n camera \u0111\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u1ea3m chi\u1ec1u d\u00e0i c\u00e1p m\u1ea1ng.<\/li>\n\n\n\n<li>D\u1ec5 b\u1ea3o tr\u00ec.<\/li>\n\n\n\n<li>Khi m\u1ed9t switch g\u1eb7p s\u1ef1 c\u1ed1 s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n\n\n\n<p>V\u00ed d\u1ee5: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>M\u1ed7i t\u1ea7ng d\u00f9ng 01 switch 24 port PoE, t\u00f9y t\u00e0i ch\u00ednh c\u1ee7a t\u1eebng c\u01a1 quan.<\/li>\n\n\n\n<li>Gom 2 t\u1ea7ng g\u1ea7n nh\u1ea5t v\u1ec1 chung 1 switch 48 port POE, ph\u01b0\u01a1ng \u00e1n n\u00e0y ti\u1ebft ki\u1ec7m module quang v\u00e0 d\u00e2y quang k\u1ebft n\u1ed1i v\u1ec1  switch core trung t\u00e2m.<\/li>\n\n\n\n<li>T\u1ea5t c\u1ea3 c\u00e1c switch camera (switch access) \u0111\u1ec1u k\u1ebft n\u1ed1i v\u1ec1 switch trung t\u00e2m (switch core hay switch distribute).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 2: Ch\u1ecdn Switch Access<\/h2>\n\n\n\n<p>Vi\u1ec7c ch\u1ecdn Switch Access r\u1ea5t \u0111\u01a1n gi\u1ea3n, b\u1ea1n ch\u1ec9 c\u1ea7n tr\u1ea3 l\u1eddi 5 c\u00e2u h\u1ecfi.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>S\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng m\u1ea1ng (port) s\u1eed d\u1ee5ng?<\/li>\n\n\n\n<li>C\u00f4ng su\u1ea5t POE tr\u00ean t\u1eebng c\u1ed5ng, t\u1ed5ng c\u00f4ng su\u1ea5t?<\/li>\n\n\n\n<li>Uplink l\u00e0 c\u1ed5ng m\u1ea1ng hay c\u1ed5ng quang?<\/li>\n\n\n\n<li>C\u00e1ch t\u00ednh b\u0103ng th\u00f4ng uplink v\u00e0 l\u1ef1a ch\u1ecdn Switching Capacity?<\/li>\n\n\n\n<li>C\u00f3 h\u1ed7 tr\u1ee3 VLAN kh\u00f4ng?<\/li>\n<\/ol>\n\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 5 c\u00e2u h\u1ecfi c\u01a1 b\u1ea3n th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 ch\u1ecdn switch cho camera \u1edf t\u1ea7ng (switch access), t\u00f9y v\u00e0o t\u1eebng quy m\u00f4 tri\u1ec3n khai m\u00e0 s\u1ebd \u0111\u00f2i h\u1ecfi th\u00eam m\u1ed9t s\u1ed1 th\u00f4ng s\u1ed1 kh\u00e1c n\u1eefa. B\u00e2y gi\u1edd m\u00ecnh s\u1ebd b\u1eaft \u0111\u1ea7u gi\u1ea3i th\u00edch t\u1eebng c\u00e2u h\u1ecfi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">1. S\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng m\u1ea1ng (port) s\u1eed d\u1ee5ng ?<\/h2>\n\n\n\n<p>B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean khi l\u1ef1a ch\u1ecdn switch l\u00e0 x\u00e1c \u0111\u1ecbnh <strong>s\u1ed1 l\u01b0\u1ee3ng thi\u1ebft b\u1ecb c\u1ea7n k\u1ebft n\u1ed1i<\/strong>. Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed7i t\u1ea7ng c\u00f3 <strong>20 camera IP<\/strong>, do \u0111\u00f3 switch c\u1ea7n t\u1ed1i thi\u1ec3u <strong>20 c\u1ed5ng m\u1ea1ng RJ45<\/strong> \u0111\u1ec3 k\u1ebft n\u1ed1i c\u00e1c camera.<\/p>\n\n\n\n<p>Hi\u1ec7n nay, switch th\u01b0\u1eddng c\u00f3 c\u00e1c phi\u00ean b\u1ea3n <strong>8 port, 16 port, 24 port v\u00e0 48 port<\/strong>. V\u1edbi h\u1ec7 th\u1ed1ng 20 camera, <strong>switch 24 port<\/strong> l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p v\u00ec v\u1eeba \u0111\u00e1p \u1ee9ng \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng camera, v\u1eeba c\u00f2n <strong>4 c\u1ed5ng d\u1ef1 ph\u00f2ng<\/strong> \u0111\u1ec3 k\u1ebft n\u1ed1i th\u00eam thi\u1ebft b\u1ecb trong t\u01b0\u01a1ng lai ho\u1eb7c thay th\u1ebf khi c\u1ea7n.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Kinh nghi\u1ec7m th\u1ef1c t\u1ebf:<\/strong> Kh\u00f4ng n\u00ean l\u1ef1a ch\u1ecdn switch v\u1eeba \u0111\u1ee7 s\u1ed1 c\u1ed5ng s\u1eed d\u1ee5ng. H\u00e3y d\u00e0nh kho\u1ea3ng <strong>10\u201320% s\u1ed1 c\u1ed5ng d\u1ef1 ph\u00f2ng<\/strong> \u0111\u1ec3 thu\u1eadn ti\u1ec7n cho vi\u1ec7c m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng, l\u1eafp th\u00eam camera ho\u1eb7c x\u1eed l\u00fd s\u1ef1 c\u1ed1 m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf switch m\u1edbi.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">V\u00ed d\u1ee5<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1ed1 l\u01b0\u1ee3ng camera: <strong>20<\/strong>.<\/li>\n\n\n\n<li>S\u1ed1 c\u1ed5ng c\u1ea7n s\u1eed d\u1ee5ng: <strong>20 port<\/strong><\/li>\n\n\n\n<li>Switch ph\u00f9 h\u1ee3p: <strong>24 port RJ45<\/strong><\/li>\n\n\n\n<li>S\u1ed1 c\u1ed5ng d\u1ef1 ph\u00f2ng: <strong>4 port<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Nh\u01b0 v\u1eady, \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng 200 camera chia \u0111\u1ec1u tr\u00ean 10 t\u1ea7ng, m\u1ed7i t\u1ea7ng ch\u1ec9 c\u1ea7n 01 switch PoE 24 port l\u00e0 c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-opt-id=802694292  fetchpriority=\"high\" decoding=\"async\" width=\"868\" height=\"115\" src=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:tELL.cb\/w:auto\/h:auto\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-1.png\" alt=\"Switch Aruba InstandOn 1930 seri\" class=\"wp-image-240\" srcset=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:tELL.cb\/w:868\/h:115\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-1.png 868w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:tELL.cb\/w:300\/h:40\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-1.png 300w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:tELL.cb\/w:768\/h:102\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-1.png 768w\" sizes=\"(max-width: 868px) 100vw, 868px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">2. C\u00f4ng su\u1ea5t POE tr\u00ean t\u1eebng c\u1ed5ng, t\u1ed5ng c\u00f4ng su\u1ea5t ?<\/h2>\n\n\n\n<p>N\u1ebfu s\u1eed d\u1ee5ng <strong>camera IP PoE<\/strong>, b\u1ea1n c\u1ea7n quan t\u00e2m \u0111\u1ebfn <strong>c\u00f4ng su\u1ea5t PoE tr\u00ean t\u1eebng c\u1ed5ng<\/strong> v\u00e0 <strong>t\u1ed5ng c\u00f4ng su\u1ea5t PoE c\u1ee7a switch<\/strong>. \u0110\u00e2y l\u00e0 hai th\u00f4ng s\u1ed1 quy\u1ebft \u0111\u1ecbnh switch c\u00f3 \u0111\u1ee7 kh\u1ea3 n\u0103ng c\u1ea5p ngu\u1ed3n cho to\u00e0n b\u1ed9 camera hay kh\u00f4ng.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5, h\u1ec7 th\u1ed1ng c\u00f3 <strong>20 camera<\/strong>, m\u1ed7i camera c\u00f3 c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 t\u1ed1i \u0111a <strong>8W<\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>T\u1ed5ng c\u00f4ng su\u1ea5t PoE c\u1ea7n thi\u1ebft:<\/strong><\/p>\n\n\n\n<p>20 camera \u00d7 8W = 160W<\/p>\n<\/blockquote>\n\n\n\n<p>Nh\u01b0 v\u1eady, b\u1ea1n n\u00ean l\u1ef1a ch\u1ecdn switch c\u00f3 <strong>t\u1ed5ng c\u00f4ng su\u1ea5t PoE l\u1edbn h\u01a1n 160W<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 v\u1eabn c\u00f2n d\u1ef1 ph\u00f2ng khi c\u00f4ng su\u1ea5t camera t\u0103ng ho\u1eb7c b\u1ed5 sung th\u00eam thi\u1ebft b\u1ecb PoE.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5, <strong>Aruba Instant On 1930 24G PoE<\/strong> c\u00f3 <strong>t\u1ed5ng c\u00f4ng su\u1ea5t PoE 195W<\/strong>, ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng h\u1ec7 th\u1ed1ng 20 camera v\u1edbi t\u1ed5ng nhu c\u1ea7u 160W v\u00e0 v\u1eabn c\u00f2n kho\u1ea3ng <strong>35W c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Ki\u1ec3m tra c\u00f4ng su\u1ea5t tr\u00ean t\u1eebng c\u1ed5ng<\/h2>\n\n\n\n<p>Ngo\u00e0i t\u1ed5ng c\u00f4ng su\u1ea5t, c\u1ea7n ki\u1ec3m tra <strong>c\u00f4ng su\u1ea5t t\u1ed1i \u0111a tr\u00ean m\u1ed7i c\u1ed5ng PoE<\/strong>. Hi\u1ec7n nay c\u00e1c chu\u1ea9n ph\u1ed5 bi\u1ebfn g\u1ed3m:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>IEEE 802.3af (PoE): 15,4W ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb Camera IP, \u0111i\u1ec7n tho\u1ea1i IP.<\/li>\n\n\n\n<li>IEEE 802.3at (PoE+): 30W ph\u00f9 h\u1ee3p v\u1edbi Camera PTZ, WiFi 6 AP.<\/li>\n\n\n\n<li>IEEE 802.3bt (PoE++): 60W ho\u1eb7c 90W ph\u00f9 h\u1ee3p v\u1edbi WiFi 6E\/7, m\u00e0n h\u00ecnh, thi\u1ebft b\u1ecb c\u00f4ng su\u1ea5t l\u1edbn<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<p>Trong v\u00ed d\u1ee5 tr\u00ean, camera ch\u1ec9 ti\u00eau th\u1ee5 <strong>8W<\/strong>, v\u00ec v\u1eady switch h\u1ed7 tr\u1ee3 <strong>PoE chu\u1ea9n 802.3af<\/strong> l\u00e0 \u0111\u00e3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Kinh nghi\u1ec7m th\u1ef1c t\u1ebf:<\/strong> Kh\u00f4ng n\u00ean t\u00ednh c\u00f4ng su\u1ea5t PoE v\u1eeba \u0111\u1ee7. H\u00e3y ch\u1ecdn switch c\u00f3 <strong>t\u1ed5ng c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng kho\u1ea3ng 20\u201330%<\/strong>, gi\u00fap h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 d\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng th\u00eam camera ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb PoE kh\u00e1c trong t\u01b0\u01a1ng lai.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">3. Uplink l\u00e0 c\u1ed5ng m\u1ea1ng hay c\u1ed5ng quang?<\/h2>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">L\u1ef1a ch\u1ecdn c\u1ed5ng RJ45<\/h2>\n\n\n\n<p>Khi l\u1ef1a ch\u1ecdn switch, ngo\u00e0i s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng m\u1ea1ng, b\u1ea1n c\u1ea7n x\u00e1c \u0111\u1ecbnh <strong>kho\u1ea3ng c\u00e1ch uplink gi\u1eefa switch access v\u00e0 switch core<\/strong>. \u0110i\u1ec1u n\u00e0y quy\u1ebft \u0111\u1ecbnh n\u00ean s\u1eed d\u1ee5ng <strong>c\u1ed5ng RJ45<\/strong> hay <strong>c\u1ed5ng quang SFP<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Kho\u1ea3ng c\u00e1ch d\u01b0\u1edbi 60 m\u00e9t:<\/strong> N\u00ean s\u1eed d\u1ee5ng <strong>c\u1ed5ng RJ45<\/strong> k\u1ebft h\u1ee3p c\u00e1p m\u1ea1ng Cat5e\/Cat6. M\u1eb7c d\u00f9 ti\u00eau chu\u1ea9n Ethernet cho ph\u00e9p truy\u1ec1n t\u1ed1i \u0111a 100 m\u00e9t, nh\u01b0ng trong th\u1ef1c t\u1ebf ch\u1ea5t l\u01b0\u1ee3ng d\u00e2y, m\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh. V\u00ec v\u1eady, nhi\u1ec1u \u0111\u01a1n v\u1ecb tri\u1ec3n khai th\u01b0\u1eddng gi\u1edbi h\u1ea1n kho\u1ea3ng <strong>60 m\u00e9t<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 gi\u1ea3m r\u1ee7i ro b\u1ea3o tr\u00ec.<\/li>\n\n\n\n<li><strong>Kho\u1ea3ng c\u00e1ch t\u1eeb 60 m\u00e9t tr\u1edf l\u00ean:<\/strong> N\u00ean s\u1eed d\u1ee5ng <strong>c\u1ed5ng quang SFP<\/strong> c\u00f9ng c\u00e1p quang \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u0103ng th\u00f4ng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">L\u1ef1a ch\u1ecdn c\u00e1p quang<\/h2>\n\n\n\n<p>C\u00f3 hai lo\u1ea1i c\u00e1p quang ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Multimode (MM):<\/strong> Ph\u00f9 h\u1ee3p cho kho\u1ea3ng c\u00e1ch <strong>d\u01b0\u1edbi 550 m\u00e9t<\/strong>, chi ph\u00ed c\u00e1p v\u00e0 module SFP th\u1ea5p n\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c t\u00f2a nh\u00e0 ho\u1eb7c h\u1ec7 th\u1ed1ng campus.<\/li>\n\n\n\n<li><strong>Singlemode (SM):<\/strong> D\u00f9ng cho kho\u1ea3ng c\u00e1ch t\u1eeb <strong>2 km, 10 km ho\u1eb7c xa h\u01a1n<\/strong>, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i module SFP. Khi s\u1eed d\u1ee5ng c\u1ea7n l\u1ef1a ch\u1ecdn \u0111\u00fang b\u01b0\u1edbc s\u00f3ng (v\u00ed d\u1ee5 <strong>1310 nm<\/strong> ho\u1eb7c <strong>1550 nm<\/strong>) v\u00e0 module t\u01b0\u01a1ng th\u00edch \u1edf c\u1ea3 hai \u0111\u1ea7u k\u1ebft n\u1ed1i.<\/li>\n<\/ul>\n\n\n\n<p><strong>Kinh nghi\u1ec7m tri\u1ec3n khai:<\/strong> N\u1ebfu to\u00e0n b\u1ed9 uplink trong h\u1ec7 th\u1ed1ng \u0111\u1ec1u d\u01b0\u1edbi <strong>60 m\u00e9t<\/strong>, b\u1ea1n ch\u1ec9 c\u1ea7n l\u1ef1a ch\u1ecdn switch c\u00f3 <strong>c\u1ed5ng uplink RJ45<\/strong>, kh\u00f4ng c\u1ea7n \u0111\u1ea7u t\u01b0 c\u1ed5ng quang SFP, gi\u00fap ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 chi ph\u00ed. N\u1ebfu h\u1ec7 th\u1ed1ng c\u00f3 c\u00e1c tuy\u1ebfn uplink d\u00e0i h\u01a1n, h\u00e3y \u01b0u ti\u00ean switch h\u1ed7 tr\u1ee3 <strong>c\u1ed5ng SFP\/SFP+<\/strong> \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u m\u1edf r\u1ed9ng v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><span style=\"text-decoration: underline;\">L\u01b0u \u00fd:<\/span><\/strong> Ph\u1ea7n l\u1ef1a ch\u1ecdn module SFP, c\u00e1p quang Singlemode\/Multimode v\u00e0 c\u00e1ch ch\u1ecdn t\u1ed1c \u0111\u1ed9 1G, 10G s\u1ebd \u0111\u01b0\u1ee3c m\u00ecnh tr\u00ecnh b\u00e0y chi ti\u1ebft trong m\u1ed9t b\u00e0i vi\u1ebft ri\u00eang.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">4. C\u00e1ch t\u00ednh b\u0103ng th\u00f4ng uplink v\u00e0 l\u1ef1a ch\u1ecdn Switching Capacity?<\/h2>\n\n\n\n<p>\u0110\u1ec3 l\u1ef1a ch\u1ecdn t\u1ed1c \u0111\u1ed9 <strong>uplink gi\u1eefa switch access v\u00e0 switch core<\/strong>, tr\u01b0\u1edbc ti\u00ean c\u1ea7n x\u00e1c \u0111\u1ecbnh <strong>t\u1ed5ng b\u0103ng th\u00f4ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i v\u1ec1 switch access<\/strong>. \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng camera IP, b\u0103ng th\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o bitrate c\u1ee7a t\u1eebng camera.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5, m\u1ed9t t\u1ea7ng c\u00f3 <strong>20 camera<\/strong>, m\u1ed7i camera \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Main Stream:<\/strong> 4 Mbps.<\/li>\n\n\n\n<li><strong>Sub Stream:<\/strong> 1 Mbps<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 1: T\u00ednh b\u0103ng th\u00f4ng l\u01b0u tr\u1eef<\/h2>\n\n\n\n<p>Th\u00f4ng th\u01b0\u1eddng, camera s\u1ebd truy\u1ec1n <strong>Main Stream<\/strong> v\u1ec1 \u0111\u1ea7u ghi h\u00ecnh (NVR) \u0111\u1ec3 l\u01b0u tr\u1eef.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>B\u0103ng th\u00f4ng Main Stream:<\/strong><\/p>\n\n\n\n<p>20 camera \u00d7 4 Mbps = <strong>80 Mbps<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 2: T\u00ednh b\u0103ng th\u00f4ng gi\u00e1m s\u00e1t tr\u1ef1c ti\u1ebfp<\/h2>\n\n\n\n<p>Khi ng\u01b0\u1eddi d\u00f9ng xem h\u00ecnh \u1ea3nh tr\u00ean NVR, Video Wall ho\u1eb7c ph\u1ea7n m\u1ec1m gi\u00e1m s\u00e1t, h\u1ec7 th\u1ed1ng th\u01b0\u1eddng s\u1eed d\u1ee5ng <strong>Sub Stream<\/strong> \u0111\u1ec3 gi\u1ea3m t\u1ea3i \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>B\u0103ng th\u00f4ng Sub Stream:<\/strong><\/p>\n\n\n\n<p>20 camera \u00d7 1 Mbps = <strong>20 Mbps<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 3: T\u1ed5ng b\u0103ng th\u00f4ng uplink<\/h2>\n\n\n\n<p>T\u1ed5ng b\u0103ng th\u00f4ng c\u1ea7n thi\u1ebft cho \u0111\u01b0\u1eddng uplink l\u00e0:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>80 Mbps + 20 Mbps = 100 Mbps<\/p>\n<\/blockquote>\n\n\n\n<p>Nh\u01b0 v\u1eady, m\u1ed9t c\u1ed5ng uplink <strong>1 Gbps<\/strong> ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 v\u1eabn c\u00f2n nhi\u1ec1u b\u0103ng th\u00f4ng d\u1ef1 ph\u00f2ng \u0111\u1ec3 m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 4: Ki\u1ec3m tra Switching Capacity c\u1ee7a switch<\/h2>\n\n\n\n<p>Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf, h\u00e3y \u0111\u1ed1i chi\u1ebfu v\u1edbi <strong>Switching Capacity<\/strong> m\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1. V\u00ed d\u1ee5: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u1ed5ng l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf: <strong>100 Mbps<\/strong>.<\/li>\n\n\n\n<li>Switching Capacity c\u1ee7a switch: <strong>56 Gbps<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Nh\u01b0 v\u1eady, switch ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u v\u00ec kh\u1ea3 n\u0103ng chuy\u1ec3n m\u1ea1ch l\u1edbn h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><span style=\"text-decoration: underline;\">L\u01b0u \u00fd:<\/span><\/strong> Switching Capacity th\u1ec3 hi\u1ec7n <strong>kh\u1ea3 n\u0103ng x\u1eed l\u00fd v\u00e0 chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u t\u1ed1i \u0111a c\u1ee7a switch<\/strong>, kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ed1c \u0111\u1ed9 c\u1ee7a m\u1ed9t c\u1ed5ng uplink. Khi thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, b\u1ea1n c\u1ea7n t\u00ednh <strong>t\u1ed5ng l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf<\/strong> \u0111\u1ec3 l\u1ef1a ch\u1ecdn t\u1ed1c \u0111\u1ed9 uplink (1G, 10G&#8230;) v\u00e0 ki\u1ec3m tra Switching Capacity ch\u1ec9 l\u00e0 b\u01b0\u1edbc x\u00e1c nh\u1eadn switch \u0111\u1ee7 n\u0103ng l\u1ef1c x\u1eed l\u00fd.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-opt-id=325064401  data-opt-src=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:bs4w.cc\/w:1024\/h:580\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-2.png\"  decoding=\"async\" width=\"1024\" height=\"580\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%201024%20580%22%20width%3D%221024%22%20height%3D%22580%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%221024%22%20height%3D%22580%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"M\u00f4 h\u00ecnh k\u1ebft n\u1ed1i b\u0103ng th\u00f4ng camera\" class=\"wp-image-242\" old-srcset=\"https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:bs4w.cc\/w:1024\/h:580\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-2.png 1024w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:bs4w.cc\/w:300\/h:170\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-2.png 300w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:bs4w.cc\/w:768\/h:435\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-2.png 768w, https:\/\/mlnyy7eygtqr.i.optimole.com\/cb:bs4w.cc\/w:1176\/h:666\/q:mauto\/g:sm\/f:best\/https:\/\/kinhnghiemlamviec.com\/wp-content\/uploads\/2026\/07\/image-2.png 1176w\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 3: Ch\u1ecdn Switch Distribute ho\u1eb7c switch core<\/h2>\n\n\n\n<p>Sau khi l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c switch Access, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 x\u00e1c \u0111\u1ecbnh <strong>switch Distribution ho\u1eb7c Switch Core<\/strong>. Kh\u00e1c v\u1edbi switch Access d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i camera, switch Core c\u00f3 nhi\u1ec7m v\u1ee5 <strong>t\u1eadp trung to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng t\u1eeb c\u00e1c switch Access<\/strong>, v\u00ec v\u1eady c\u1ea7n quan t\u00e2m \u0111\u1ebfn <strong>s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng uplink, t\u1ed1c \u0111\u1ed9 uplink v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd b\u0103ng th\u00f4ng<\/strong>.<\/p>\n\n\n\n<p>\u0110\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u00fang model switch Core, h\u00e3y tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u1ec7 th\u1ed1ng c\u00f3 bao nhi\u00eau <strong>switch Access<\/strong> k\u1ebft n\u1ed1i v\u1ec1 Core?<\/li>\n\n\n\n<li>M\u1ed7i switch Access s\u1eed d\u1ee5ng <strong>1 hay 2 \u0111\u01b0\u1eddng uplink<\/strong>?<\/li>\n\n\n\n<li>T\u1ed1c \u0111\u1ed9 uplink c\u1ee7a m\u1ed7i switch Access l\u00e0 <strong>1Gbps, 10Gbps<\/strong>?<\/li>\n\n\n\n<li>T\u1ed5ng b\u0103ng th\u00f4ng to\u00e0n h\u1ec7 th\u1ed1ng l\u00e0 bao nhi\u00eau?<\/li>\n\n\n\n<li>Switch Core c\u00f3 h\u1ed7 tr\u1ee3 <strong>VLAN, Layer 3 Routing, Static Route, OSPF<\/strong> hay kh\u00f4ng?<\/li>\n\n\n\n<li>H\u1ec7 th\u1ed1ng c\u00f3 c\u1ea7n <strong>Stack<\/strong> ho\u1eb7c <strong>d\u1ef1 ph\u00f2ng (Redundancy)<\/strong> kh\u00f4ng?<\/li>\n<\/ul>\n\n\n\n<p>Ti\u1ebfp theo ch\u00fang ta s\u1ebd l\u1ea7n l\u01b0\u1ee3t t\u00ednh to\u00e1n t\u1eebng ti\u00eau ch\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ed5ng uplink<\/h2>\n\n\n\n<p>Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 h\u1ec7 th\u1ed1ng <strong>200 camera, 10 t\u1ea7ng<\/strong>, m\u1ed7i t\u1ea7ng s\u1eed d\u1ee5ng <strong>01 switch Access<\/strong>. Nh\u01b0 v\u1eady switch Core c\u1ea7n k\u1ebft n\u1ed1i \u0111\u1ebfn:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>10 switch Access<\/li>\n\n\n\n<li>M\u1ed7i switch Access s\u1eed d\u1ee5ng <strong>01 c\u1ed5ng uplink<\/strong><\/li>\n<\/ul>\n\n\n\n<p>=&gt; Switch Core c\u1ea7n t\u1ed1i thi\u1ec3u <strong>10 c\u1ed5ng uplink<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n<p>N\u1ebfu thi\u1ebft k\u1ebf d\u1ef1 ph\u00f2ng b\u1eb1ng <strong>02 \u0111\u01b0\u1eddng uplink<\/strong> cho m\u1ed7i switch Access th\u00ec:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>10 switch \u00d7 2 uplink = 20 c\u1ed5ng uplink.<\/p>\n<\/blockquote>\n\n\n\n<p>Do \u0111\u00f3, khi l\u1ef1a ch\u1ecdn switch Core c\u1ea7n t\u00ednh c\u1ea3 nhu c\u1ea7u m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai \u0111\u1ec3 tr\u00e1nh thi\u1ebfu c\u1ed5ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 uplink<\/h2>\n\n\n\n<p>\u1ede b\u01b0\u1edbc tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ednh \u0111\u01b0\u1ee3c m\u1ed7i switch Access c\u1ea7n kho\u1ea3ng <strong>100 Mbps<\/strong> b\u0103ng th\u00f4ng.<\/p>\n\n\n\n<p>M\u1eb7c d\u00f9 l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf ch\u1ec9 kho\u1ea3ng <strong>100 Mbps<\/strong>, nh\u01b0ng trong thi\u1ebft k\u1ebf m\u1ea1ng doanh nghi\u1ec7p <strong>kh\u00f4ng n\u00ean l\u1ef1a ch\u1ecdn uplink \u0111\u00fang b\u1eb1ng nhu c\u1ea7u hi\u1ec7n t\u1ea1i<\/strong>. Th\u00f4ng th\u01b0\u1eddng n\u00ean l\u1ef1a ch\u1ecdn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uplink <strong>1Gbps<\/strong> cho h\u1ec7 th\u1ed1ng d\u01b0\u1edbi kho\u1ea3ng <strong>30\u201340 camera\/switch<\/strong>.<\/li>\n\n\n\n<li>Uplink <strong>10Gbps<\/strong> khi switch Access ph\u1ee5c v\u1ee5 nhi\u1ec1u camera, nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c c\u1ea7n d\u1ef1 ph\u00f2ng m\u1edf r\u1ed9ng.<\/li>\n<\/ul>\n\n\n\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, <strong>uplink 1Gbps<\/strong> l\u00e0 ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 3: T\u00ednh t\u1ed5ng b\u0103ng th\u00f4ng v\u1ec1 Switch Core<\/h2>\n\n\n\n<p>Gi\u1ea3 s\u1eed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>10 switch Access<\/li>\n\n\n\n<li>M\u1ed7i switch Access s\u1eed d\u1ee5ng kho\u1ea3ng <strong>100 Mbps<\/strong><\/li>\n<\/ul>\n\n\n\n<p>T\u1ed5ng l\u01b0u l\u01b0\u1ee3ng v\u1ec1 Switch Core l\u00e0:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>10 \u00d7 100 Mbps = 1 Gbps<\/p>\n<\/blockquote>\n\n\n\n<p>Do \u0111\u00f3, Switch Core c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng l\u1edbn h\u01a1n <strong>1 Gbps<\/strong> v\u00e0 n\u00ean l\u1ef1a ch\u1ecdn <strong>Switching Capacity<\/strong> cao \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng khi h\u1ec7 th\u1ed1ng m\u1edf r\u1ed9ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 4: C\u00f3 c\u1ea7n h\u1ed7 tr\u1ee3 VLAN v\u00e0 Layer 3 kh\u00f4ng?<\/h2>\n\n\n\n<p>Trong h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng camera IP, n\u00ean l\u1ef1a ch\u1ecdn <strong>Switch Core Layer 3<\/strong> \u0111\u1ec3 th\u1ef1c hi\u1ec7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ecbnh tuy\u1ebfn gi\u1eefa c\u00e1c VLAN (Inter-VLAN Routing).<\/li>\n\n\n\n<li>Ph\u00e2n t\u00e1ch VLAN Camera, Qu\u1ea3n tr\u1ecb, Server, Client.<\/li>\n\n\n\n<li>T\u0103ng t\u00ednh b\u1ea3o m\u1eadt.<\/li>\n\n\n\n<li>D\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng trong t\u01b0\u01a1ng lai.<\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu h\u1ec7 th\u1ed1ng ch\u1ec9 c\u00f3 m\u1ed9t VLAN duy nh\u1ea5t th\u00ec Switch Layer 2 v\u1eabn c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng, tuy nhi\u00ean <strong>kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/strong> cho c\u00e1c h\u1ec7 th\u1ed1ng t\u1eeb v\u00e0i ch\u1ee5c camera tr\u1edf l\u00ean.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Kinh nghi\u1ec7m th\u1ef1c t\u1ebf.<\/h2>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng kho\u1ea3ng <strong>200 camera<\/strong>, m\u00ecnh th\u01b0\u1eddng l\u1ef1a ch\u1ecdn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Switch Access:<\/strong> 24 port PoE, uplink <strong>1Gbps<\/strong><\/li>\n\n\n\n<li><strong>Switch Core:<\/strong> 24 port SFP ho\u1eb7c 24 port RJ45 + 4 SFP+, h\u1ed7 tr\u1ee3 <strong>Layer 3, VLAN v\u00e0 Stack<\/strong><\/li>\n<\/ul>\n\n\n\n<p>C\u1ea5u h\u00ecnh n\u00e0y v\u1eeba \u0111\u00e1p \u1ee9ng t\u1ed1t nhu c\u1ea7u hi\u1ec7n t\u1ea1i, v\u1eeba d\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng khi b\u1ed5 sung th\u00eam camera ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng kh\u00e1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng camera IP kh\u00f4ng qu\u00e1 ph\u1ee9c t\u1ea1p n\u1ebfu b\u1ea1n th\u1ef1c hi\u1ec7n theo \u0111\u00fang c\u00e1c b\u01b0\u1edbc sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>B\u01b0\u1edbc 1:<\/strong> X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng camera \u0111\u1ec3 l\u1ef1a ch\u1ecdn s\u1ed1 c\u1ed5ng m\u1ea1ng ph\u00f9 h\u1ee3p.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 2:<\/strong> T\u00ednh t\u1ed5ng c\u00f4ng su\u1ea5t PoE \u0111\u1ec3 ch\u1ecdn switch c\u00f3 c\u00f4ng su\u1ea5t c\u1ea5p ngu\u1ed3n \u0111\u00e1p \u1ee9ng nhu c\u1ea7u.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 3:<\/strong> X\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch uplink \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u1ed5ng RJ45 ho\u1eb7c c\u1ed5ng quang SFP.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 4:<\/strong> T\u00ednh t\u1ed5ng b\u0103ng th\u00f4ng \u0111\u1ec3 l\u1ef1a ch\u1ecdn t\u1ed1c \u0111\u1ed9 uplink v\u00e0 Switching Capacity ph\u00f9 h\u1ee3p.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 5:<\/strong> L\u1ef1a ch\u1ecdn switch Distribution ho\u1eb7c Switch Core d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng uplink, b\u0103ng th\u00f4ng v\u00e0 c\u00e1c t\u00ednh n\u0103ng Layer 3 nh\u01b0 VLAN, OSPF ho\u1eb7c Stack \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng d\u1ef1 ph\u00f2ng.<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi v\u00ed d\u1ee5 trong b\u00e0i vi\u1ebft (<strong>200 camera, 10 t\u1ea7ng<\/strong>), gi\u1ea3i ph\u00e1p ph\u1ed5 bi\u1ebfn l\u00e0 s\u1eed d\u1ee5ng <strong>switch Access PoE 24 port<\/strong> cho m\u1ed7i t\u1ea7ng v\u00e0 <strong>switch Core Layer 2<\/strong> ho\u1eb7c  <strong>switch Core Layer 3<\/strong> \u0111\u1ec3 t\u1eadp trung to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng c\u1ee7a h\u1ec7 th\u1ed1ng. C\u00e1ch thi\u1ebft k\u1ebf n\u00e0y v\u1eeba \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng, v\u1eeba d\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng khi b\u1ed5 sung th\u00eam camera trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<p>Hy v\u1ecdng b\u00e0i vi\u1ebft s\u1ebd gi\u00fap b\u1ea1n t\u1ef1 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c switch ph\u00f9 h\u1ee3p cho h\u1ec7 th\u1ed1ng camera IP. Trong c\u00e1c b\u00e0i vi\u1ebft ti\u1ebfp theo, m\u00ecnh s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch <strong>l\u1ef1a ch\u1ecdn module SFP, c\u00e1p quang Singlemode\/Multimode, t\u00ednh dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef NVR v\u00e0 l\u1ef1a ch\u1ecdn Switch Core cho h\u1ec7 th\u1ed1ng l\u1edbn t\u1eeb 500 \u0111\u1ebfn 2.000 camera<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n\n\n<p>B\u00e0i vi\u1ebft \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean kinh nghi\u1ec7m tri\u1ec3n khai th\u1ef1c t\u1ebf v\u00e0 c\u00e1c t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hpe.com\/us\/en\/instant-on\/switches.html\" data-type=\"link\" data-id=\"https:\/\/www.hpe.com\/us\/en\/instant-on\/switches.html\">HPE Networking Instant On Switches<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/11\/cach-lua-chon-module-sfp-cho-switch-trong-he-thong-cctv\/\" data-type=\"link\" data-id=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/11\/cach-lua-chon-module-sfp-cho-switch-trong-he-thong-cctv\/\">C\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1ch ch\u1ecdn Switch cho h\u1ec7 th\u1ed1ng CCTV l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng camera IP. Nhi\u1ec1u ng\u01b0\u1eddi ch\u1ec9 quan &hellip; <a title=\"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera\" class=\"hm-read-more\" href=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/10\/huong-dan-chi-tiet-cach-lua-chon-switch-cho-he-thong-cctv-dap-ung-tai-200-camera\/\"><span class=\"screen-reader-text\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":245,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,5,42],"tags":[54,8,56,55,53],"class_list":["post-229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cctv","category-design-network","category-he-thong-vms-video-management-system","tag-cameraip","tag-cctv","tag-lua-chon-switch","tag-nvr","tag-thiet-ke-mang-cctv"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera - Kinh Nghi\u1ec7m L\u00e0m Vi\u1ec7c<\/title>\n<meta name=\"description\" content=\"H\u01b0\u1edbng d\u1eabn ch\u1ecdn Switch Camera IP cho h\u1ec7 th\u1ed1ng CCTV. 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