{"id":8234108,"date":"2026-10-24T17:26:47","date_gmt":"2026-10-24T17:26:47","guid":{"rendered":"https:\/\/scn.eu\/?post_type=scn_guide&#038;p=8234108"},"modified":"2026-10-24T17:32:46","modified_gmt":"2026-10-24T17:32:46","slug":"managed-switch","status":"publish","type":"scn_guide","link":"https:\/\/scn.eu\/sv\/guider\/managed-switch\/","title":{"rendered":"Managed eller unmanaged switch \u2013 och n\u00e4r beh\u00f6vs TSN?"},"content":{"rendered":"<div class=\"scn-guide\">\n<h1>Managed eller unmanaged switch \u2013 och n\u00e4r beh\u00f6vs TSN?<\/h1>\n<p class=\"g-lead\">En unmanaged switch kopplar ihop enheter utan inst\u00e4llningar. En managed switch l\u00e5ter dig styra, prioritera och \u00f6vervaka trafiken. H\u00e4r g\u00e5r vi igenom skillnaderna, vad industrin kr\u00e4ver och n\u00e4r Time-Sensitive Networking (TSN) \u00e4r v\u00e4rt att v\u00e4lja.<\/p>\n<div class=\"g-short\"><b class=\"t\">Kort svar<\/b><\/p>\n<ul>\n<li><b>Unmanaged<\/b> \u2013 plug and play utan inst\u00e4llningar. R\u00e4cker f\u00f6r en liten, avskild maskin eller cell.<\/li>\n<li><b>Managed<\/b> \u2013 VLAN, prioritering, IGMP snooping, redundans och diagnostik. Beh\u00f6vs n\u00e4r n\u00e4tet v\u00e4xer eller kopplas till fabriksn\u00e4tet.<\/li>\n<li><b>Smart switch<\/b> \u2013 ett mellanl\u00e4ge med de viktigaste funktionerna och enklare inst\u00e4llningar.<\/li>\n<li><b>Ring<\/b> \u2013 med ett ringprotokoll kopplar n\u00e4tet om till reservv\u00e4gen p\u00e5 millisekunder vid kabelbrott.<\/li>\n<li><b>TSN<\/b> \u2013 garanterad f\u00f6rdr\u00f6jning p\u00e5 standard-Ethernet. Aktuellt n\u00e4r styrning, video och IT ska dela samma n\u00e4t.<\/li>\n<\/ul>\n<\/div>\n<h2>Vad \u00e4r skillnaden?<\/h2>\n<p>En switch skickar varje Ethernet-ram till r\u00e4tt port. En unmanaged switch g\u00f6r bara det: den l\u00e4r sig adresserna sj\u00e4lv och fungerar direkt. En managed switch g\u00e5r att konfigurera via webbl\u00e4sare, kommandorad eller SNMP. D\u00e5 kan du dela upp n\u00e4tet, prioritera viktig trafik, bygga redundans och se vad som h\u00e4nder p\u00e5 varje port.<\/p>\n<div class=\"g-tbl\">\n<table>\n<thead>\n<tr>\n<th>Funktion<\/th>\n<th>Unmanaged<\/th>\n<th>Managed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"n\">Inst\u00e4llningar<\/td>\n<td>Inga<\/td>\n<td>Webb, kommandorad, SNMP<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">VLAN<\/td>\n<td>Nej<\/td>\n<td>Ja, IEEE 802.1Q<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Prioritering<\/td>\n<td>Ibland fast<\/td>\n<td>Ja, inst\u00e4llbar<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">IGMP snooping<\/td>\n<td>Nej<\/td>\n<td>Ja<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Redundans<\/td>\n<td>Nej<\/td>\n<td>RSTP, MRP och ringprotokoll<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Diagnostik<\/td>\n<td>Lysdioder, ibland larmrel\u00e4<\/td>\n<td>Portstatistik, larm, loggar, portspegling<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">S\u00e4kerhet<\/td>\n<td>Ingen<\/td>\n<td>Anv\u00e4ndarkonton, portl\u00e5sning, IEEE 802.1X<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Pris<\/td>\n<td>L\u00e4gre<\/td>\n<td>H\u00f6gre<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Mellan dem finns smarta switchar, ibland kallade l\u00e4ttmanagerade. De har ett urval av funktionerna, till exempel VLAN, RSTP och st\u00f6d f\u00f6r PROFINET eller EtherNet\/IP, men \u00e4r enklare att st\u00e4lla in.<\/p>\n<h2>Funktionerna som g\u00f6r skillnad i industrin<\/h2>\n<h3>VLAN<\/h3>\n<p>Med VLAN delas ett fysiskt n\u00e4t i flera logiska. Styrsystem, kameror och kontorstrafik kan g\u00e5 genom samma switchar utan att se varandra. Det begr\u00e4nsar st\u00f6rningar och g\u00f6r n\u00e4tet s\u00e4krare.<\/p>\n<h3>Prioritering (QoS)<\/h3>\n<p>Trafiken m\u00e4rks med prioritet enligt IEEE 802.1p, s\u00e5 att I\/O-data g\u00e5r f\u00f6re fil\u00f6verf\u00f6ringar och video n\u00e4r en l\u00e4nk \u00e4r h\u00e5rt belastad.<\/p>\n<h3>IGMP snooping<\/h3>\n<p>Switchen skickar multicast bara till de portar som har bett om den. Det \u00e4r viktigt i EtherNet\/IP-n\u00e4t och f\u00f6r videostr\u00f6mmar, d\u00e4r multicast annars fyller hela n\u00e4tet.<\/p>\n<h3>Redundans<\/h3>\n<p>RSTP (IEEE 802.1w) \u00e4r standard och fungerar mellan olika m\u00e4rken, men omkopplingen kan ta fr\u00e5n under en sekund till flera sekunder i st\u00f6rre n\u00e4t. Ringprotokoll som MRP (IEC 62439-2) och tillverkarnas egna, till exempel Moxa Turbo Ring, kopplar om inom tiotals till hundratals millisekunder. HSR och PRP (IEC 62439-3) skickar trafiken tv\u00e5 v\u00e4gar samtidigt och ger avbrottsfri redundans, till exempel i elstationer.<\/p>\n<figure><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/scn-guide-switch-f1-sv.webp\" alt=\"Fyra switchar i en ring. L\u00e4nken mellan switch 2 och 3 \u00e4r bruten, och den blockerade reservl\u00e4nken mellan switch 4 och 1 \u00f6ppnas s\u00e5 att trafiken tar andra v\u00e4gen\" width=\"1520\" height=\"520\" loading=\"lazy\" decoding=\"async\"><figcaption>En ring med fyra switchar: vid kabelbrott \u00f6ppnas den blockerade reservl\u00e4nken.<\/figcaption><\/figure>\n<h3>Diagnostik och PoE<\/h3>\n<p>En managed switch visar l\u00e4nkstatus, fel och trafik per port och kan larma via SNMP, e-post eller rel\u00e4utg\u00e5ng. PoE matar kameror, accesspunkter och givare via n\u00e4tverkskabeln: upp till 15,4 W per port med IEEE 802.3af, 30 W med 802.3at och upp till 90 W med 802.3bt, r\u00e4knat vid switchen.<\/p>\n<h2>Vad kr\u00e4ver industrin av en switch?<\/h2>\n<ul>\n<li><b>Temperatur<\/b> \u2013 industriswitchar finns f\u00f6r \u221240 till 75 \u00b0C, utan fl\u00e4kt.<\/li>\n<li><b>Montering<\/b> \u2013 DIN-skena eller v\u00e4gg med metallh\u00f6lje, och 19-tumsrack f\u00f6r stamn\u00e4t.<\/li>\n<li><b>Matning<\/b> \u2013 dubbla ing\u00e5ngar f\u00f6r liksp\u00e4nning, till exempel 12\u201348 V DC, och larmrel\u00e4 vid matningsbortfall.<\/li>\n<li><b>Kontakter och t\u00e4thet<\/b> \u2013 M12 i st\u00e4llet f\u00f6r RJ45 d\u00e4r det skakar, och IP67 f\u00f6r fordon och utomhusbruk.<\/li>\n<li><b>Godk\u00e4nnanden<\/b> \u2013 EN 50155 f\u00f6r j\u00e4rnv\u00e4gsfordon, IEC 61850-3 f\u00f6r elstationer och Class I Division 2 eller ATEX zon 2 f\u00f6r explosionsfarlig milj\u00f6.<\/li>\n<\/ul>\n<h3>Vilken switch passar var?<\/h3>\n<div class=\"g-tbl\">\n<table>\n<thead>\n<tr>\n<th>Om du \u2026<\/th>\n<th>\u2026 v\u00e4lj<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>bygger en liten maskin med f\u00e5 enheter och inget fabriksn\u00e4t<\/td>\n<td>Unmanaged switch<\/td>\n<\/tr>\n<tr>\n<td>levererar maskiner som kopplas in i kundens n\u00e4t<\/td>\n<td>Managed eller smart switch med VLAN och st\u00f6d f\u00f6r PROFINET eller EtherNet\/IP<\/td>\n<\/tr>\n<tr>\n<td>har m\u00e5nga EtherNet\/IP-enheter eller videostr\u00f6mmar<\/td>\n<td>Managed switch med IGMP snooping<\/td>\n<\/tr>\n<tr>\n<td>driver en process d\u00e4r ett kabelbrott inte f\u00e5r stoppa produktionen<\/td>\n<td>Managed switch med ringprotokoll eller MRP<\/td>\n<\/tr>\n<tr>\n<td>matar kameror och accesspunkter i tunnlar, garage eller hamnar<\/td>\n<td>Switch med PoE<\/td>\n<\/tr>\n<tr>\n<td>bygger n\u00e4t i t\u00e5g och sp\u00e5rvagnar<\/td>\n<td>M12-switch enligt EN 50155<\/td>\n<\/tr>\n<tr>\n<td>bygger elstationer och st\u00e4llverk<\/td>\n<td>Switch enligt IEC 61850-3, ofta med PRP eller HSR<\/td>\n<\/tr>\n<tr>\n<td>bygger fordon, fartyg eller f\u00f6rsvarssystem<\/td>\n<td>IP67-klassad switch eller VPX-switch<\/td>\n<\/tr>\n<tr>\n<td>ska blanda styrning, video och IT med garanterade svarstider<\/td>\n<td>TSN-switch<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Vad \u00e4r TSN och n\u00e4r spelar det roll?<\/h2>\n<p>Time-Sensitive Networking (TSN) \u00e4r en samling standarder fr\u00e5n IEEE 802.1 som g\u00f6r vanligt Ethernet deterministiskt. Utan TSN kan en stor videostr\u00f6m eller fil\u00f6verf\u00f6ring f\u00f6rdr\u00f6ja styrdata en kort stund. Med TSN f\u00e5r den tidskritiska trafiken garanterad f\u00f6rdr\u00f6jning, \u00e4ven n\u00e4r n\u00e4tet \u00e4r fullt av annan trafik.<\/p>\n<ul>\n<li><b>IEEE 802.1AS<\/b> \u2013 gemensam klocka i alla enheter.<\/li>\n<li><b>IEEE 802.1Qbv<\/b> \u2013 schemalagda tidsluckor f\u00f6r den tidskritiska trafiken.<\/li>\n<li><b>IEEE 802.1Qbu och 802.3br<\/b> \u2013 l\u00e5nga ramar kan avbrytas n\u00e4r en br\u00e5dskande ram ska fram.<\/li>\n<li><b>IEEE 802.1CB<\/b> \u2013 ramar skickas tv\u00e5 v\u00e4gar f\u00f6r avbrottsfri redundans.<\/li>\n<\/ul>\n<figure><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/scn-guide-switch-f2-sv.webp\" alt=\"Tidsschema i ett TSN-n\u00e4t: varje cykel b\u00f6rjar med en reserverad tidslucka f\u00f6r styrdata, d\u00e4refter \u00f6vrig trafik som video och IT\" width=\"1520\" height=\"430\" loading=\"lazy\" decoding=\"async\"><figcaption>TSN reserverar en tidslucka i varje cykel, s\u00e5 att styrdata aldrig beh\u00f6ver v\u00e4nta p\u00e5 annan trafik.<\/figcaption><\/figure>\n<p>TSN spelar roll n\u00e4r styrning, video och IT ska dela samma n\u00e4t med h\u00e5rda tidskrav, n\u00e4r r\u00f6relsestyrning ska g\u00e5 \u00f6ver ett gemensamt n\u00e4t, och i fordon, flyg och f\u00f6rsvar d\u00e4r m\u00e5nga system delar ett stamn\u00e4t. PROFINET och OPC UA har varianter f\u00f6r TSN, och IEC\/IEEE 60802 beskriver en gemensam TSN-profil f\u00f6r industriautomation.<\/p>\n<p>F\u00f6r en vanlig maskin eller produktionscell beh\u00f6vs inte TSN i dag. PROFINET och EtherNet\/IP fungerar bra med vanliga managed switchar. Bygger du en anl\u00e4ggning som ska leva i 15\u201320 \u00e5r kan det \u00e4nd\u00e5 vara klokt att fr\u00e5ga efter TSN-st\u00f6d.<\/p>\n<h2>Vanliga misstag<\/h2>\n<ol class=\"g-pit\">\n<li><b>Unmanaged switch i ett EtherNet\/IP-n\u00e4t.<\/b> Utan IGMP snooping skickas multicast till alla portar, och enkla enheter kan f\u00e5 mer trafik \u00e4n de klarar.<\/li>\n<li><b>En slinga utan redundansprotokoll.<\/b> Kopplas tv\u00e5 portar ihop av misstag uppst\u00e5r en broadcaststorm som kan sl\u00e5 ut hela n\u00e4tet. RSTP eller stormskydd f\u00f6rhindrar det.<\/li>\n<li><b>Olika ringprotokoll i samma ring.<\/b> Tillverkarnas egna ringprotokoll fungerar s\u00e4llan mellan m\u00e4rken. Blandar du m\u00e4rken, v\u00e4lj en standard som MRP eller RSTP.<\/li>\n<li><b>PoE-budgeten r\u00e4cker inte.<\/b> Kontrollera b\u00e5de effekten per port och switchens totala budget. \u00c5tta kameror p\u00e5 30 W kr\u00e4ver 240 W.<\/li>\n<li><b>Standardl\u00f6senordet ligger kvar.<\/b> En managed switch med fabriksl\u00f6senord \u00e4r en \u00f6ppen d\u00f6rr in i styrsystemet. Byt l\u00f6senord och st\u00e4ng tj\u00e4nster som inte anv\u00e4nds.<\/li>\n<\/ol>\n<h2>Switchar hos SCN<\/h2>\n<p>Vi har unmanaged, managed och TSN-switchar fr\u00e5n bland andra Moxa, Axiomtek, Yaskawa, Duagon, Diamond Systems och Enercon. Sortimentet str\u00e4cker sig fr\u00e5n sm\u00e5 switchar f\u00f6r DIN-skena till Layer 3-switchar f\u00f6r rack, M12-switchar f\u00f6r t\u00e5g och VPX-switchar f\u00f6r f\u00f6rsvarssystem.<\/p>\n<h3>Exempel ur v\u00e5rt sortiment<\/h3>\n<div class=\"g-prod\"><a class=\"g-pc\" href=\"https:\/\/scn.eu\/sv\/produkt\/eacsw-sv\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/winmate-eacsw-main.webp\" alt=\"Winmate EACSW marin Ethernet-switch med 8 portar\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Winmate<\/span><span class=\"g-pn\">EACSW marin Ethernet-switch med 8 portar<\/span><span class=\"g-pw\">Omanagerad switch med \u00e5tta portar \u2013 plug and play, dubbla matningsing\u00e5ngar 12\u201348 V DC, f\u00f6r DIN-skena eller v\u00e4gg.<\/span><\/a><a class=\"g-pc\" href=\"https:\/\/scn.eu\/sv\/produkt\/pn5-rd-pn8-rd-managed-profinet-switch-sv\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/yaskawa-pn5-rd-pn8-rd-main.webp\" alt=\"Yaskawa PN5-RD \/ PN8-RD hanterad PROFINET-switch\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Yaskawa<\/span><span class=\"g-pn\">PN5-RD \/ PN8-RD hanterad PROFINET-switch<\/span><span class=\"g-pw\">Managed PROFINET-switch (Conformance Class B) med Turbo Ring, VLAN, QoS och IGMP snooping f\u00f6r DIN-skena.<\/span><\/a><a class=\"g-pc\" href=\"https:\/\/scn.eu\/sv\/produkt\/tsn-g5016-sv\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/moxa-tsn-g5016-main.webp\" alt=\"Moxa TSN-G5016 TSN-switch med 16 gigabitportar\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Moxa<\/span><span class=\"g-pn\">TSN-G5016 TSN-switch med 16 gigabitportar<\/span><span class=\"g-pw\">Managed TSN-switch med tidssynkronisering enligt IEEE 802.1AS och schemal\u00e4ggning enligt IEEE 802.1Qbv.<\/span><\/a><\/div>\n<div class=\"g-links\"><a href=\"https:\/\/scn.eu\/sv\/produkt-kategori\/produkter-sv\/network-products-sv\/ethernet-sv\/managed-switches-sv\/\">Managerade switchar<\/a><a href=\"https:\/\/scn.eu\/sv\/produkt-kategori\/produkter-sv\/network-products-sv\/ethernet-sv\/unmanaged-switches-sv\/\">Omanagerade switchar<\/a><a href=\"https:\/\/scn.eu\/sv\/produkt-kategori\/produkter-sv\/network-products-sv\/ethernet-sv\/time-sensitive-networking-sv\/\">Tidsk\u00e4nsliga n\u00e4tverk (TSN)<\/a><a href=\"https:\/\/scn.eu\/sv\/produkt-kategori\/produkter-sv\/network-products-sv\/ethernet-sv\/mil-ethernet-switches-sv\/\">MIL Ethernet-switchar<\/a><a href=\"https:\/\/scn.eu\/sv\/produkt-kategori\/produkter-sv\/network-products-sv\/ethernet-sv\/\">N\u00e4tverksswitchar<\/a><\/div>\n<div class=\"g-cta\">\n<p>Os\u00e4ker p\u00e5 vilken switch n\u00e4tet beh\u00f6ver? Beskriv anl\u00e4ggningen f\u00f6r v\u00e5ra ingenj\u00f6rer \u2013 du f\u00e5r svar inom 24 timmar.<\/p>\n<p><a href=\"https:\/\/scn.eu\/sv\/kontakt\/\">Fr\u00e5ga en ingenj\u00f6r<\/a><\/div>\n<h2>Vanliga fr\u00e5gor<\/h2>\n<details>\n<summary>Kan man blanda managed och unmanaged switchar?<\/summary>\n<p>Ja, de fungerar tillsammans i samma n\u00e4t. Men VLAN, IGMP snooping och redundans g\u00e4ller bara i de managed switcharna, s\u00e5 placera dem d\u00e4r trafiken m\u00f6ts.<\/p>\n<\/details>\n<details>\n<summary>Vad \u00e4r IGMP snooping?<\/summary>\n<p>En funktion d\u00e4r switchen h\u00e5ller reda p\u00e5 vilka enheter som vill ta emot en multicaststr\u00f6m och bara skickar den till deras portar. Utan den skickas multicast ut \u00f6verallt.<\/p>\n<\/details>\n<details>\n<summary>Beh\u00f6ver PROFINET en managed switch?<\/summary>\n<p>Inte alltid. I Conformance Class A r\u00e4cker vanliga switchar, men Class B kr\u00e4ver switchar med PROFINET-diagnostik, bland annat topologiinformation via LLDP och SNMP.<\/p>\n<\/details>\n<details>\n<summary>Vad \u00e4r skillnaden mellan RSTP och MRP?<\/summary>\n<p>RSTP \u00e4r en allm\u00e4n IEEE-standard som fungerar i alla topologier, men omkopplingen kan ta upp till n\u00e5gra sekunder. MRP \u00e4r gjort f\u00f6r ringar i industrin\u00e4t och kopplar om inom en garanterad tid, vanligen h\u00f6gst 200 ms.<\/p>\n<\/details>\n<details>\n<summary>Fungerar vanliga enheter i ett TSN-n\u00e4t?<\/summary>\n<p>Ja, TSN-switchar vidarebefordrar vanlig Ethernet-trafik. Garantierna f\u00f6r f\u00f6rdr\u00f6jning g\u00e4ller dock bara den schemalagda trafiken, och alla switchar p\u00e5 v\u00e4gen m\u00e5ste st\u00f6dja TSN.<\/p>\n<\/details>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>En unmanaged switch kopplar ihop enheter utan inst\u00e4llningar. En managed switch l\u00e5ter dig styra, prioritera och \u00f6vervaka trafiken. H\u00e4r g\u00e5r vi igenom skillnaderna, vad industrin kr\u00e4ver och n\u00e4r Time-Sensitive Networking (TSN) \u00e4r v\u00e4rt att v\u00e4lja.<\/p>\n","protected":false},"author":11,"featured_media":8234087,"template":"","meta":{"_yoast_wpseo_focuskw":"managed switch","_yoast_wpseo_metadesc":"Managed eller unmanaged switch? 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