{"id":12325,"date":"2018-07-26T09:39:22","date_gmt":"2018-07-26T07:39:22","guid":{"rendered":"https:\/\/www.websupport.sk\/blog\/?p=12325"},"modified":"2025-03-11T21:07:22","modified_gmt":"2025-03-11T20:07:22","slug":"prerabka-siete","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2018\/07\/prerabka-siete\/","title":{"rendered":"Nov\u00e1 sie\u0165: ko\u013eko skvel\u00fdch vec\u00ed prin\u00e1\u0161a na\u0161im z\u00e1kazn\u00edkom?"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\"><b>Doba \u010d\u00edtania:<\/b><\/span> <span class=\"rt-time\"> 10<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span><p>Zv\u00e4\u010d\u0161uj\u00face sa n\u00e1roky na d\u00e1tove prenosy v r\u00e1mci na\u0161ej siete, ale aj do internetu n\u00e1s postavili pred \u00falohu moderniz\u00e1cie siete. Na\u0161u sie\u0165 sme budovali v roku 2013 a po 4 rokoch slu\u017eby n\u00e1m u\u017e kapacitne, v\u00fdkonnostne, ale ani svoj\u00edm dizajnom neposta\u010dovala. Preto sme sa rozhodli k rozsiahlej prer\u00e1bke, ktor\u00e1 n\u00e1m priniesla <strong>zv\u00fd\u0161enie stability, odolnosti vo\u010di \u00fatokom a zv\u00fd\u0161ila kapacitu prepojov medzi jednotliv\u00fdmi rackmi a\u017e 8 n\u00e1sobne<\/strong>.<\/p>\n<p>P\u00f4vodn\u00e1 sie\u0165 pozost\u00e1vala z centr\u00e1lnej dvojice 10 Gbit switchov Cisco 4500X. Tie sl\u00fa\u017eili z\u00e1rove\u0148 ako hlavn\u00e9 switche siete, ale aj ako L3 routre pre konektivitu do internetu. Av\u0161ak zvy\u0161uj\u00face sa n\u00e1roky na d\u00e1tov\u00e9 prenosy po sieti uk\u00e1zali, \u017ee n\u00e1m doch\u00e1dzaj\u00fa mo\u017enosti roz\u0161\u00edrenia siete o \u010fal\u0161ie 10 Gbit porty a ani 1Gbit pripojenie pre koncov\u00e9 servery nebude dosta\u010duj\u00face. Sie\u0165 bola postaven\u00e1 tak, \u017ee servery boli pripojen\u00e9 1+1 Gbit\/s do top-of-rack switchov, ktor\u00e9 boli pripojen\u00e9 2x 10 Gbit\/s do hlavn\u00fdch switchov.<\/p>\n<figure id=\"attachment_12326\" aria-describedby=\"caption-attachment-12326\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12326 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/sietova-prerabka-1100x825.jpg\" alt=\"P\u00f4vodn\u00e1 dvojica Cisco 4500X po odpojen\u00ed.\" width=\"1100\" height=\"825\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-1100x825.jpg 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-300x225.jpg 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-768x576.jpg 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-1920x1441.jpg 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-1680x1261.jpg 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-1240x930.jpg 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-860x645.jpg 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-680x510.jpg 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-500x375.jpg 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-400x300.jpg 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-250x188.jpg 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-200x150.jpg 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-100x75.jpg 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-76x57.jpg 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka-50x38.jpg 50w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/sietova-prerabka.jpg 1999w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12326\" class=\"wp-caption-text\">P\u00f4vodn\u00e1 dvojica Cisco 4500X po odpojen\u00ed.<\/figcaption><\/figure>\n<p>Ako kr\u00e1tkodob\u00e9 rie\u0161enie sme zak\u00fapili dvojicu 48 portov\u00fdch 10 Gbit\/s switchov Dell S4048-ON. To n\u00e1m umo\u017enilo pripoji\u0165 nov\u00e9 racky a zariadenia 2 x 10 Gbit\/s. St\u00e1le sme v\u0161ak \u201cnar\u00e1\u017eali\u201d na dizajnov\u00fd probl\u00e9m siete. Konkr\u00e9tne, zranitelnos\u0165 celej siete pri v\u00fdpadku hlavnej dvojice switchov. Na druhej strane ani zapojenie top-of-rack switchov nebolo jednotn\u00e9. Nejednodnos\u0165 spo\u010d\u00edvala v tom, \u017ee niektor\u00e9 switche boli zapojen\u00e9 ako samostatn\u00e9, teda neboli v stacku resp. spojen\u00e9 vo virtualn\u00fdch switchoch (VSS, VLT.), a naopak, niektor\u00e9 boli.<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/p6C6kLSPP_Y\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<p>Preto sme sa rozhodli o paraleln\u00e9 budovanie <strong>novej hlavnej siete<\/strong>,<strong> s dostato\u010dnou kapacitou aj do bud\u00facnosti<\/strong>. Po\u010das prer\u00e1bky sme sa rozhodli \u00faplne zjednoti\u0165 zapojenie top-of-rack switchov, pr\u00edpadne niektor\u00e9 switche nahradi\u0165 novou gener\u00e1ciou switchov. Dnes u\u017e servery be\u017ene prip\u00e1jame 2x 10Gbit\/s do top-of-rack switchov a cel\u00e9 racky prip\u00e1jame k hlavnej sieti a\u017e 8x 10Gbit\/s.<\/p>\n<p>&nbsp;<\/p>\n<p><em>O prer\u00e1bke celej siete sme sa rozpr\u00e1vali s <strong>Romanom Zelenajom<\/strong>, ktor\u00fd je sie\u0165ov\u00fdm architektom v spolo\u010dnosti <strong>Lightstorm Services<\/strong>.\u00a0<\/em><span style=\"font-size: 1rem;\">V\u00fdsledkom na\u0161ej spolupr\u00e1ce je v\u00fdrazne robustnej\u0161ia sie\u0165 pre klientov s dvojn\u00e1sobnou r\u00fdchlos\u0165ou pre sie\u0165 a diskov\u00e9 pole.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Pre\u010do ste zvolili L3 routed core network? Ak\u00e9 v\u00fdhody m\u00e1 vo\u010di predch\u00e1dzaj\u00facemu n\u00e1vrhu siete?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Roman:<\/strong> Sie\u0165ov\u00e1 infra\u0161trukt\u00fara bola p\u00f4vodne dizajnovan\u00e1 tak, aby v sieti neboli \u017eiadne slu\u010dky. To znamen\u00e1, \u017ee \u017eiadna linka nebola blokovan\u00e1 <em><strong>STP<\/strong> <strong>protokolom<\/strong><\/em>, v\u0161etky linky boli agregovan\u00e9 pomocou <em><strong>LACP<\/strong><\/em> a bolo mo\u017en\u00e9 ich pln\u00e9 vyu\u017e\u00edvanie d\u00e1tovou prev\u00e1dzkou. \u010co sa t\u00fdka spanning-tree protokolu, tak v minulosti bol probl\u00e9m s interkompatibilitou zariaden\u00ed. Tento probl\u00e9m s kompatibilitou nebol \u00faplne zjavn\u00fd, av\u0161ak za ur\u010dit\u00fdch okolnost\u00ed to dok\u00e1zalo zmias\u0165 switche, a aj ke\u010f nemali, odrezali port, \u010do v niektor\u00fdch pr\u00edpadoch znamenalo degrad\u00e1ciu alebo znefunk\u010dnenie \u010dasti slu\u017eieb.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hlavn\u00fd d\u00f4vod, pre\u010do je pou\u017eit\u00fd RSTP protokol a MSTP bolo zru\u0161en\u00e9 je to, \u017ee MSTP protokol nie je podporovan\u00fd v Dell zariadeniach v re\u017eime VLT (Cisco vPC ekvivalent). Preto bolo v niektor\u00fdch situ\u00e1ci\u00e1ch potrebn\u00e9 kombinova\u0165 RSTP a MSTP, \u010do ale nie je best-practice. Na v\u00fdber bol e\u0161te protokol PVST, av\u0161ak tak, ako je moment\u00e1lne sie\u0165ov\u00e1 infra\u0161trukt\u00fara dizajnovan\u00e1 (\u017eiadne slu\u010dky), nie je potrebn\u00e9 robi\u0165 optimaliz\u00e1ciu liniek, ke\u010f\u017ee v\u0161etky linky s\u00fa akt\u00edvne.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u010co sa t\u00fdka routovan\u00e9ho core segmentu siete, t\u00fdm, \u017ee sme rozdelili core a edge, zv\u00fd\u0161ili sme spo\u013eahlivos\u0165 siete a jej odolnos\u0165 vo\u010di potenci\u00e1lnym probl\u00e9mom s routingom, \u010di u\u017e v r\u00e1mci datacentra alebo medzi datacentrom a upstream providerom. To, ako je teraz sie\u0165 zapojen\u00e1 toleruje zlyhanie viacer\u00fdch komponentov s minim\u00e1lnym dopadom na prev\u00e1dzku.<\/span><\/p>\n<p><strong>Ak\u00e9 benefity m\u00e1 toto rie\u0161enie pre bud\u00facnos\u0165 siete, stabilitu a mo\u017enosti jej roz\u0161\u00edrenia? Ako to poc\u00edtia na\u0161i z\u00e1kzan\u00edci?<\/strong><\/p>\n<p><strong>Roman:<\/strong> Na pochopenie priamych benefitov je potrebn\u00e9 uvedomi\u0165 si nieko\u013eko vec\u00ed. Prv\u00e1 vec je to, \u017ee pokia\u013e nefunguje sie\u0165 spr\u00e1vne, trpia v\u0161etky slu\u017eby. Druh\u00e1 vec je zmena toho, ako sa vyv\u00edja charakter komunik\u00e1cie klient-slu\u017eba a komunik\u00e1cia v r\u00e1mci slu\u017eby (komunik\u00e1cia medzi servermi v r\u00e1mci danej slu\u017eby). V minulosti bol dominantn\u00fd smer north-south, to znamen\u00e1, \u017ee zna\u010dn\u00e1 \u010das\u0165 komunik\u00e1cie bola iba medzi klientom a serverom, ku ktor\u00e9mu dan\u00fd klient pristupoval. Postupne ako sa technol\u00f3gie vyv\u00edjali, za\u010dal sa meni\u0165 aj charakter komunik\u00e1cie. V dne\u0161nej dobe, je v\u00e4\u010d\u0161ina d\u00e1tovej prev\u00e1dzky pr\u00e1ve v r\u00e1mci datacentra medzi servermi &#8211; east-west. Pribudla k tomu komunik\u00e1cia medzi servermi a \u00falo\u017eiskami, \u010do je tie\u017e east-west traffic.<\/p>\n<p>Konvergencia sieti (d\u00e1ta + storage cez zdie\u013ean\u00e9 m\u00e9dium) umo\u017enila u\u0161etrenie n\u00e1kladov na samostatn\u00e9 SAN a z\u00e1rove\u0148 zjednodu\u0161ila \u0161k\u00e1lovanie celej infra\u0161trukt\u00fary. \u010eal\u0161ia nezanedbate\u013en\u00e1 vec je, \u017ee servery s\u00fa v prip\u00e1jan\u00e9 do siete pomocou X * 10Gbit\/s portami, \u010do samozrejme zvy\u0161uje priepustnos\u0165, zni\u017euje odozvy a t\u00fdm p\u00e1dom s\u00fa poskytovan\u00e9 kvalitnej\u0161ie slu\u017eby.<\/p>\n<p>Jednou z v\u00fdhod nov\u00e9ho distribuovan\u00e9ho core je to, \u017ee core boxy a top-of-rack switche nie s\u00fa zapojen\u00e9 v re\u017eime stacku ale VLT. T\u00fdm, \u017ee zariadenia maj\u00fa nez\u00e1visl\u00fa \u201ccontrol plane\u201d, neovplyvn\u00ed to navz\u00e1jom switche. V novej architekt\u00fare je mo\u017en\u00e9 robi\u0165 upgrade firmware zariaden\u00ed. M\u00e1 to minim\u00e1lny dopad na infra\u0161trukt\u00faru a je to mo\u017en\u00e9 robi\u0165 prakticky bez v\u00fdpadku. Z\u00e1rove\u0148, ak by bol nejak\u00fd probl\u00e9m na edge \u010dasti siete, nemalo by to ma\u0165 vplyv na funkcionalitu v r\u00e1mci datacentra (east-west traffic).<\/p>\n<p>T\u00fdm, \u017ee je sie\u0165 aktu\u00e1lne<em><strong> bez slu\u010diek, s\u00fa vyu\u017e\u00edvan\u00e9 v\u0161etky linky, \u010d\u00edm je dvojn\u00e1sobne zv\u00fd\u0161en\u00e1 priepustnos\u0165 medzi core zariadeniami a rackom<\/strong>.<\/em> Presunutie routingu do nov\u00e9ho core umo\u017enilo vypusti\u0165 protokol VRRP (HSRP) a vyu\u017ei\u0165 funkcionalitu VLT Peer-proxy, \u010do znamen\u00e1 to, \u017ee obe akt\u00edvne zariadenia, dok\u00e1\u017eu obsluhova\u0165 d\u00e1tov\u00fa prev\u00e1dzku.<\/p>\n<figure id=\"attachment_12331\" aria-describedby=\"caption-attachment-12331\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12331 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/opticka-spojka-1100x825.jpg\" alt=\"Detail optickej spojky po\u010das tvorby nov\u00fdch prepojov pre nov\u00fa sie\u0165\" width=\"1100\" height=\"825\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-1100x825.jpg 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-300x225.jpg 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-768x576.jpg 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-1920x1441.jpg 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-1680x1261.jpg 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-1240x930.jpg 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-860x645.jpg 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-680x510.jpg 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-500x375.jpg 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-400x300.jpg 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-250x188.jpg 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-200x150.jpg 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-100x75.jpg 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-76x57.jpg 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka-50x38.jpg 50w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/opticka-spojka.jpg 1999w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12331\" class=\"wp-caption-text\">Detail optickej spojky po\u010das tvorby nov\u00fdch prepojov pre nov\u00fa sie\u0165<\/figcaption><\/figure>\n<figure id=\"attachment_12332\" aria-describedby=\"caption-attachment-12332\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12332 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/switche-1100x825.jpg\" alt=\"Sple\u0165 viacer\u00fdch switchov, najvy\u0161\u0161ie sa nach\u00e1dza p\u00f4vodne roz\u0161irenie starej siete, pod n\u00edm sa nach\u00e1dza nov\u00fd hlavn\u00fd switch S6100 a \u00faplne dole je nov\u00fd edge router S4048\" width=\"1100\" height=\"825\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-1100x825.jpg 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-300x225.jpg 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-768x576.jpg 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-1920x1441.jpg 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-1680x1261.jpg 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-1240x930.jpg 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-860x645.jpg 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-680x510.jpg 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-500x375.jpg 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-400x300.jpg 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-250x188.jpg 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-200x150.jpg 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-100x75.jpg 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-76x57.jpg 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche-50x38.jpg 50w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/switche.jpg 1999w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12332\" class=\"wp-caption-text\">Sple\u0165 viacer\u00fdch switchov. Najvy\u0161\u0161ie sa nach\u00e1dza p\u00f4vodn\u00e9 roz\u0161\u00edrenie starej siete. Pod n\u00edm sa nach\u00e1dza nov\u00fd hlavn\u00fd switch S6100. \u00daplne dolu je nov\u00fd edge router S4048<\/figcaption><\/figure>\n<p><iframe loading=\"lazy\" width=\"100%\" height=\"166\" scrolling=\"no\" frameborder=\"no\" allow=\"autoplay\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/430959291&#038;color=%23ff5500&#038;auto_play=false&#038;hide_related=false&#038;show_comments=true&#038;show_user=true&#038;show_reposts=false&#038;show_teaser=true\"><\/iframe><\/p>\n<p><strong>Ako prebiehal prechod na nov\u00fa sie\u0165ov\u00fa architekt\u00faru? <\/strong><\/p>\n<p><strong>Roman:<\/strong> Bezbolestne a s minim\u00e1lnym dopadom na infra\u0161trukt\u00faru. Ke\u010f sa staval nov\u00fd network, bol \u00faplne nez\u00e1visl\u00fd, \u010do umo\u017enilo otestovanie r\u00f4znych sc\u00e9n\u00e1rov v\u00fdpadkov bez toho, aby to akoko\u013evek vpl\u00fdvalo na be\u017eiacu infra\u0161trukt\u00faru. Po tom, \u010do sa otesovala spr\u00e1vna funk\u010dnos\u0165 novej siete, boli obe prepojen\u00e9. Siete boli prepojen\u00e9 2x 40Gbit\/s linkami, \u010do d\u00e1valo slu\u0161n\u00fa rezervu na d\u00e1tov\u00fa a storage prev\u00e1dzku.<\/p>\n<p>Migr\u00e1cia na nov\u00fa sie\u0165 prebiehala &#8222;prelievan\u00edm&#8220;. Pr\u00edklad, rack mal uplink X * 10Gbit\/s. Vypla sa polovica t\u00fdchto uplinkov a vo vypnutom stave sa prepojili do novej siete. V dohodnut\u00fd \u010das, nastala situ\u00e1cia, \u017ee sa vypol uplink do starej siete a v tom momente sa o\u017eivil prepoj do novej siete. Toto malo za n\u00e1sledok v\u00fdpadok v trvan\u00ed p\u00e1r sek\u00fand (&lt; 5s) a nasledne ozivenie.<\/p>\n<p>Po\u010das toho, ako sa pres\u00favali racky, boli pres\u00favan\u00e9 aj gateway do nov\u00e9ho core. Ako bolo spomenut\u00e9 vy\u0161\u0161ie, \u010do sa t\u00fdka gateway, tak<em><strong> jedna z najv\u00e4\u010d\u0161\u00edch v\u00fdhod tohto rie\u0161enie oproti predch\u00e1dzaj\u00facemu networku je vyu\u017e\u00edvanie routovac\u00edch zdrojov na 100%<\/strong><\/em> (\u017eiadne pas\u00edvne boxy v HSRP a podobne.)<\/p>\n<p>Pres\u00favanie routingu medzi ISP a WebSupportom prebiehalo tak, \u017ee upstream provider pripravil \u010fal\u0161ie prepojie ur\u010den\u00e9 pre BGP, av\u0161ak tieto linky zoza\u010diatku neboli vyu\u017e\u00edvan\u00e9 a bolo vytvoren\u00e9 iba BGP spojenie. Po\u010das toho ako sa pres\u00favali default gateway-e zo star\u00e9ho networku na nov\u00fd, za\u010dali postupne edge zariadenia oznamova\u0165 tieto siete cez nov\u00e9 linky a\u017e do stavu, pokia\u013e v starom networku neboli \u017eiadne gateway a neboli oznamovan\u00e9 \u017eiadne siete a bolo mo\u017en\u00e9 star\u00e9 BGP uplinky \u00faplne vypn\u00fa\u0165.<\/p>\n<p><strong>A \u010do racky?<\/strong><\/p>\n<p><strong>Roman:<\/strong> Samotn\u00e9 racky sme pres\u00favali fyzick\u00fdm \u201cprecvaknut\u00edm\u201d z jednej siete do druhej, \u010do sprev\u00e1dzala nieko\u013eko sekundov\u00e1 nedostupnos\u0165 slu\u017eieb. Konektivitu do internetu sme pres\u00favali pomocou zmeny BGP priority pre r\u00f4zne linky.<\/p>\n<p>Zauj\u00edmavos\u0165ou v\u0161ak bol prechod diskov\u00e9ho po\u013ea do novej siete, ktor\u00fd ste aj komunikovali vopred klientom a informovali ich. Vtedy sme najprv \u201cprecvakli\u201d pas\u00edvny controller a n\u00e1sledne vykonali fail-over produkcie zo starej siete do novej. Prev\u00e1dzka sa do nieko\u013ek\u00fdch desiatok sek\u00fand obnovila a slu\u017eby VPS be\u017eali nepretr\u017eite \u010falej.<\/p>\n<p>Separ\u00e1tnou kapitolou bola zmena konfigur\u00e1cie blade chassis, kde sme menili taktie\u017e sp\u00f4sob zapojenia zo separ\u00e1tnych switchov na switche spojen\u00e9 vo VLT. Tento prechod bol spojen\u00fd s prechodom z active-passive m\u00f3du na active-active pre jednotliv\u00e9 blade servery. To v\u0161etko za behu s minim\u00e1lnym dopadom na beh slu\u017eieb z\u00e1kazn\u00edkov.<\/p>\n<p>V\u010faka tomu, \u017ee sa sna\u017e\u00edme dr\u017ea\u0165 ve\u013emi n\u00edzku agreg\u00e1ciu pri virtu\u00e1lnych serveroch sme mali dostato\u010dn\u00fa kapacitu, kedy sme na nieko\u013eko dn\u00ed mohli z cel\u00e9ho jedn\u00e9ho chassis presun\u00fa\u0165 v\u0161etky VPS na druh\u00e9 chassis. Treba v\u0161ak doda\u0165, \u017ee jedno chassis m\u00e1 plne osaden\u00fdch 16 blade serverov, kde ka\u017ed\u00fd m\u00e1 256 GB RAM a aspo\u0148 40 logick\u00fdch jadier.<\/p>\n<p>V\u00fdsledkom je <em><strong>v\u00fdrazne robustnej\u0161ia sie\u0165<\/strong><\/em> pre klientov so dvojn\u00e1sobnou r\u00fdchlos\u0165ou pre sie\u0165 a diskov\u00e9 pole.<\/p>\n<p><strong>Ako si spokojn\u00fd s prev\u00e1dzkou a spr\u00e1vou siete po takmer roku od prer\u00e1bky? Ak\u00e9 rozhodnutia sa uk\u00e1zali ako spr\u00e1vne a \u010do by bolo pr\u00edpadne dobr\u00e9 e\u0161te vylep\u0161i\u0165 do bud\u00facna?<\/strong><\/p>\n<p><strong>Roman:<\/strong> Maxim\u00e1lna spokojnos\u0165. Od nasadenia nov\u00e9ho networku nebol \u017eiaden probl\u00e9m s STP alebo nejak\u00fdmi slu\u010dkami. Okrem prev\u00e1dzkov\u00fdch zmien (konfigur\u00e1cie portov, vlan, prid\u00e1vanie ra\u010dkov), neboli roben\u00e9 \u017eiadne zmeny v architekt\u00fare. Taktie\u017e sa neobjavili ani \u017eiadne pricipialne probl\u00e9my. Tak ako bolo po\u010das n\u00e1vrhu pl\u00e1novan\u00e9, prev\u00e1dzka siete ide ve\u013emi hladko. T\u00fdm, ako je sie\u0165 nadimenzovana, po\u010d\u00edtame s rastom infra\u0161trukt\u00fary a d\u00e1tov\u00fdch prenosov bez potrebn\u00fdch zmien v sieti. Ak by bola potrebn\u00e1 zv\u00fd\u0161i\u0165 priepustnos\u0165 infra\u0161trukt\u00fary, je to mo\u017en\u00e9 bez potrebn\u00fdch zmien v architekt\u00fare. T\u00fdm p\u00e1dom sme pripraven\u00fd \u010deli\u0165 aj navacsim v\u00fdzvam \u010do sa t\u00fdka d\u00e1tov\u00fdch prenosov.<\/p>\n<p><strong>Vie\u0161 poveda\u0165 viac k monitorovaniu siete?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Roman:<\/strong> Sie\u0165 monitorujeme na 3 \u00farovniach: <\/span><\/p>\n<ol>\n<li>D\u00e1tov\u00e9 prenosy &#8211; d\u00e1tov\u00e9 prenosy s\u00fa monitorovan\u00e9 pomocou sFlow (PRTG\/Elasticsearch). T\u00e1to technol\u00f3gia n\u00e1m umo\u017e\u0148uje monitorovanie d\u00e1tov\u00fdch tokov v r\u00e1mci siete a medzi datacentrom a internetom. V pr\u00edpade, \u017ee by nie\u010do v\u00fdrazne vy\u0165a\u017eovalo sie\u0165, vieme presne identifikova\u0165 server a typ slu\u017eby, ktor\u00e1 tak\u00e9to nie\u010do sp\u00f4sobuje.<\/li>\n<li>\u00a0Sie\u0165ov\u00e9 metriky &#8211; pomocou monitorovacieho n\u00e1stroja s\u00fa zbieran\u00e9 inform\u00e1cie zo sie\u0165ov\u00fdch zariaden\u00ed, \u010do n\u00e1m umo\u017e\u0148uje sledova\u0165 vy\u0165a\u017eovanie a trendy jednotliv\u00fdch prvkov v sieti. Taktie\u017e n\u00e1s to informuje o mo\u017en\u00fdch probl\u00e9moch ako s\u00fa dostupnos\u0165 zariaden\u00ed, po\u010d\u00edtadla, stavy rozhran\u00ed a podobne<\/li>\n<li>Logovanie &#8211; vzh\u013eadom na mno\u017estvo zariaden\u00ed, je neefekt\u00edvne prihlasova\u0165 sa na zariadenia a sledova\u0165 logy. Je potrebn\u00e9 tieto logy agregova\u0165 a n\u00e1sledne vizualizova\u0165 pre lep\u0161iu predstavu.<\/li>\n<\/ol>\n<figure id=\"attachment_12394\" aria-describedby=\"caption-attachment-12394\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12394 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/traffic-1100x287.png\" alt=\"\" width=\"1100\" height=\"287\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-1100x287.png 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-300x78.png 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-768x200.png 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-1920x501.png 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-1680x438.png 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-1240x324.png 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-860x224.png 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-680x177.png 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-500x130.png 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-400x104.png 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-250x65.png 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-200x52.png 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-100x26.png 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-76x20.png 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/traffic-50x13.png 50w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12394\" class=\"wp-caption-text\">Graf trafficu v jednom z rackov za 2 hodiny<\/figcaption><\/figure>\n<figure id=\"attachment_12396\" aria-describedby=\"caption-attachment-12396\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12396 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/kto-s-kym-1100x428.png\" alt=\"\" width=\"1100\" height=\"428\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-1100x428.png 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-300x117.png 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-768x299.png 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-1920x748.png 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-1680x654.png 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-1240x483.png 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-860x335.png 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-680x265.png 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-500x195.png 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-400x156.png 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-250x97.png 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-200x78.png 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-100x39.png 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-76x30.png 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/kto-s-kym-50x19.png 50w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12396\" class=\"wp-caption-text\">Reprezent\u00e1cia kto s k\u00fdm komunikuje najviac za &#8222;posledn\u00e9&#8220; 2 hodiny<\/figcaption><\/figure>\n<figure id=\"attachment_12397\" aria-describedby=\"caption-attachment-12397\" style=\"width: 1100px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12397 size-large\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2018\/07\/rozne-sluzby-1100x185.png\" alt=\"\" width=\"1100\" height=\"185\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-1100x185.png 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-300x50.png 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-768x129.png 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-1920x323.png 1920w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-1680x283.png 1680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-1240x209.png 1240w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-860x145.png 860w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-680x114.png 680w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-500x84.png 500w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-400x67.png 400w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-250x42.png 250w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-200x34.png 200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-100x17.png 100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-76x13.png 76w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2018\/07\/rozne-sluzby-50x8.png 50w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption id=\"caption-attachment-12397\" class=\"wp-caption-text\">Posledn\u00e9 2 hodiny pod\u013ea typu slu\u017eieb<\/figcaption><\/figure>\n<p><strong>M\u00e1te nespo\u010det certifik\u00e1ci\u00ed a partnerstvo s Dellom. V \u010dom vynik\u00e1te?<\/strong><\/p>\n<p><strong>Roman:<\/strong> \u010co sa t\u00fdka LightStormu, na\u0161i zamestnanci s\u00fa na \u00farovni <em><strong>medzin\u00e1rodne uzn\u00e1van\u00fdch certifik\u00e1ci\u00ed<\/strong><\/em> (CCNP, VCP6-DCV, RHCE), \u010do n\u00e1m umo\u017e\u0148ujne ch\u00e1pa\u0165 r\u00f4zne infra\u0161trukt\u00fary ako celok a nie len ako \u010das\u0165 infra\u0161trukt\u00fary. Ch\u00e1peme po\u017eiadavk\u00e1m z\u00e1kazn\u00edka a trendom, ktor\u00fdmi sa informa\u010dn\u00e9 technol\u00f3gie uberaj\u00fa. <strong><em>Schopnos\u0165 r\u00fdchlej adapt\u00e1cie n\u00e1m umo\u017e\u0148uje fungova\u0165 na najnov\u0161\u00edch technol\u00f3gi\u00e1ch a t\u00fdm by\u0165 v popred\u00ed pred konkurenciou.<\/em> <\/strong>Boli sme medzi prv\u00fdmi na svete, ktor\u00ed sme nasadzovali routovac\u00ed box od DELL &#8211; S4248 a pomohli sme odstr\u00e1ni\u0165 dokonca nieko\u013eko bugov.<\/p>\n<p>Neboj\u00edme sa h\u013eada\u0165 limity nov\u00fdch technol\u00f3gi\u00ed. Sme <strong>Dell Gold Partner<\/strong> na dod\u00e1vku hardv\u00e9ru + spolupracujeme s Dellom v pre-sales f\u00e1ze a deployment f\u00e1ze pre r\u00f4znych z\u00e1kazn\u00edkov a dod\u00e1vate\u013eov. Najlep\u0161\u00ed partner sme preto, lebo so z\u00e1kazn\u00edkmi pracujeme na individu\u00e1lnej \u00farovni a sna\u017e\u00edme sa pochopi\u0165 potreby z\u00e1kazn\u00edka individu\u00e1lne. To znamen\u00e1, \u017ee sa nejedn\u00e1 o to, \u017ee m\u00e1me nejak\u00fd zau\u017e\u00edvan\u00fd sp\u00f4sob a ten aplikujeme zaka\u017ed\u00fdm. V\u0161etky rie\u0161enia, ktor\u00e9 poskytujeme, s\u00fa &#8222;u\u0161it\u00e9 na mieru&#8220;.<\/p>\n<p>Vzh\u013eadom na \u0161irokospektr\u00e1lne zameranie (Network, Storage, Server, Security, DevOps, Software Development, Docker, Kubernetes) dok\u00e1\u017eeme z\u00e1kazn\u00edkom pom\u00f4c\u0165 prekona\u0165 aj tie naj\u0165a\u017e\u0161ie v\u00fdzvy.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zv\u00e4\u010d\u0161uj\u00face sa n\u00e1roky na d\u00e1tove prenosy v r\u00e1mci na\u0161ej siete, ale aj do internetu n\u00e1s postavili pred \u00falohu moderniz\u00e1cie siete. Na\u0161u sie\u0165 sme budovali v roku 2013 a po 4 rokoch slu\u017eby n\u00e1m u\u017e kapacitne, v\u00fdkonnostne, ale ani svoj\u00edm dizajnom neposta\u010dovala. Preto sme sa rozhodli k rozsiahlej prer\u00e1bke, ktor\u00e1 n\u00e1m priniesla zv\u00fd\u0161enie stability, odolnosti vo\u010di [&hellip;]<\/p>\n","protected":false},"author":119,"featured_media":12462,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,11],"tags":[1206,1208,1203,1205,1207,727,1204,956],"class_list":["post-12325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","category-zakulisie","tag-infrastruktura","tag-lightstorm","tag-network","tag-prerabka","tag-roman-zelenaj","tag-rozhovor","tag-siet","tag-websupport"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nov\u00e1 sie\u0165: ko\u013eko skvel\u00fdch vec\u00ed prin\u00e1\u0161a na\u0161im z\u00e1kazn\u00edkom? - Websupport blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.websupport.sk\/blog\/2018\/07\/prerabka-siete\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nov\u00e1 sie\u0165: ko\u013eko skvel\u00fdch vec\u00ed prin\u00e1\u0161a na\u0161im z\u00e1kazn\u00edkom? - Websupport blog\" \/>\n<meta property=\"og:description\" content=\"Zv\u00e4\u010d\u0161uj\u00face sa n\u00e1roky na d\u00e1tove prenosy v r\u00e1mci na\u0161ej siete, ale aj do internetu n\u00e1s postavili pred \u00falohu moderniz\u00e1cie siete. Na\u0161u sie\u0165 sme budovali v roku 2013 a po 4 rokoch slu\u017eby n\u00e1m u\u017e kapacitne, v\u00fdkonnostne, ale ani svoj\u00edm dizajnom neposta\u010dovala. 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