{"id":41517,"date":"2010-07-19T08:03:33","date_gmt":"2010-07-19T06:03:33","guid":{"rendered":"https:\/\/blog.wedos.cz\/?p=41517"},"modified":"2020-09-02T08:04:44","modified_gmt":"2020-09-02T06:04:44","slug":"nase-konektivita-a-paterni-sit","status":"publish","type":"post","link":"https:\/\/blog.wedos.com\/cs\/nase-konektivita-a-paterni-sit","title":{"rendered":"Na\u0161e konektivita a p\u00e1te\u0159n\u00ed s\u00ed\u0165"},"content":{"rendered":"\n<p>Z\u00e1kladem kvalitn\u00edch internetov\u00fdch slu\u017eeb je dobr\u00e1 konektivita, tedy propojen\u00ed na\u0161\u00ed s\u00edt\u011b z datov\u00e9ho centra do Internetu, a spr\u00e1vn\u011b nastaven\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165, kter\u00e1 se vyrovn\u00e1 s poruchami a v\u00fdpadky.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>Propojit na\u0161e servery se zbytkem sv\u011bta zahrnuje n\u011bkolik d\u00edl\u010d\u00edch probl\u00e9m\u016f:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Vybudovat p\u00e1te\u0159n\u00ed s\u00ed\u0165 v samotn\u00e9m datacentru<\/li><li>Sjednat datov\u00e9 spoje z datov\u00e9ho centra do m\u00edst, kde je mo\u017en\u00e9 se propojit s dal\u0161\u00edmi s\u00edt\u011bmi a d\u00e1le do Internetu<\/li><li>Domluvit se s dal\u0161\u00edmi s\u00edt\u011bmi o vz\u00e1jemn\u00e9m propojen\u00ed a sehnat jednoho nebo v\u00edce telekomunika\u010dn\u00edch oper\u00e1tor\u016f, kte\u0159\u00ed n\u00e1m zajist\u00ed konektivitu do zbytku Internetu<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">P\u00e1te\u0159n\u00ed s\u00ed\u0165 a routery<\/h2>\n\n\n\n<p>Cel\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 bude zalo\u017eena na ethernetu, v\u0161echny propoje mezi routery budou ze za\u010d\u00e1tku 1 Gbps, snadn\u00fdm upgradem switch\u016f a kabel\u00e1\u017ee v\u0161ak bude mo\u017en\u00e9 rychle dos\u00e1hnout 10 Gbps ethernetu.<\/p>\n\n\n\n<p>V\u0161echny na\u0161e routery budou zalo\u017eeny na serverov\u00e9m hardware s procesorem Intel Xeon X5650 a 6 GB RAM (DDR3 1333MHz) s mno\u017estv\u00edm metalick\u00fdch a optick\u00fdch ethernetov\u00fdch rozhran\u00ed. Jako opera\u010dn\u00ed syst\u00e9m bude vyu\u017eit&nbsp;<strong>Linux s j\u00e1drem 2.6<\/strong>. Jako routovac\u00ed software jsme zvolili&nbsp;<strong>BIRD<\/strong>&nbsp;(v\u00edce informac\u00ed v n\u011bkter\u00e9m z dal\u0161\u00edch \u010dl\u00e1nk\u016f).<\/p>\n\n\n\n<p>V\u0161echny routery budou vz\u00e1jemn\u011b propojeny do dvojit\u00e9 hv\u011bzdy. V\u0161echny aktivn\u00ed prvky (routery, switche) budou m\u00edt redundantn\u00ed nap\u00e1jec\u00ed zdroje, zapojen\u00e9 do 2 nez\u00e1visl\u00fdch nap\u00e1jec\u00edch v\u011btv\u00ed. Do budoucna pl\u00e1nujeme tak\u00e9 vz\u00e1jemnou zastupitelnost koncov\u00fdch router\u016f (gateway pro servery) pou\u017eit\u00edm n\u011bkter\u00e9ho z fail-over protokol\u016f (VRRP, CARP).<\/p>\n\n\n\n<p>Na\u0161e datacentrum v Hlubok\u00e9 nad Vltavou bude propojeno optickou trasou od&nbsp;<strong>Telef\u00f3nica O2<\/strong>&nbsp;do&nbsp;<strong>telehousu SITEL<\/strong>&nbsp;v Praze. Konektivita to bude velmi luxusn\u00ed, proto\u017ee na\u0161\u00ed budovou p\u0159\u00edmo proch\u00e1z\u00ed p\u00e1te\u0159n\u00ed optick\u00e1 s\u00ed\u0165 O2 propojuj\u00edc\u00ed ji\u017en\u00ed \u010cechy s Prahou. To znamen\u00e1 nejen kvalitn\u00ed propoj s minim\u00e1ln\u00ed latenc\u00ed (odezvou), ale t\u00e9\u017e z\u00e1ruku rychl\u00e9ho \u0159e\u0161en\u00ed probl\u00e9m\u016f v p\u0159\u00edpad\u011b n\u011bjak\u00e9 poruchy. Vzhledem ke kapacit\u00e1m optick\u00fdch tras O2 z na\u0161\u00ed budovy je mo\u017en\u00e1 konektivita v podstat\u011b neomezen\u00e1, ze za\u010d\u00e1tku budeme pou\u017e\u00edvat 1 Gbps spoj, m\u00e1me v\u0161ak ji\u017e p\u0159edjednan\u00fd snadn\u00fd upgrade na 10 Gbps spoj, spoj\u016f v\u0161ak m\u016f\u017ee b\u00fdt v\u00edce a mohou se libovoln\u011b kombinovat.<\/p>\n\n\n\n<p>Jako z\u00e1lo\u017en\u00ed trasu vyu\u017eijeme bu\u010f jinou linku od O2, kter\u00e1 v\u0161ak povede fyzicky jinou trasou, anebo vyu\u017eijeme zcela jin\u00e9ho oper\u00e1tora, k jeho\u017e za\u0159\u00edzen\u00ed se v\u0161ak mus\u00edme n\u011bjak\u00fdm zp\u016fsobem komplikovan\u011b dostat. M\u016f\u017eeme z centra na okraj m\u011bsta Hlubok\u00e1 vykopat vlastn\u00ed optick\u00e9 veden\u00ed (co\u017e je drah\u00e9, ale v\u00fdsledek bude velmi dobr\u00fd, t\u00e9m\u011b\u0159 neomezen\u00e1 kapacita) nebo vytvo\u0159it bezdr\u00e1tov\u00e9 spojen\u00ed (rychlej\u0161\u00ed a levn\u011bj\u0161\u00ed \u0159e\u0161en\u00ed, av\u0161ak velmi omezen\u00e1 kapacita, do budoucna zcela nevyhovuj\u00edc\u00ed). V t\u00e9to v\u011bci zat\u00edm nepadlo rozhodnut\u00ed, zejm\u00e9na \u0159e\u0161\u00edme, nakolik je druh\u00e1 optick\u00e1 trasa O2 nez\u00e1visl\u00e1 na t\u00e9 prvn\u00ed. Z\u00e1lo\u017en\u00ed propoj mo\u017en\u00e1 skon\u010d\u00ed v Praze v jin\u00e9m telehouse.<\/p>\n\n\n\n<p>Uvnit\u0159 na\u0161eho autonomn\u00edho syst\u00e9mu bude pou\u017e\u00edv\u00e1n routovac\u00ed protokol&nbsp;<strong>OSPF<\/strong>&nbsp;(bez rozd\u011blen\u00ed do v\u00edce oblast\u00ed).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Peering<\/h2>\n\n\n\n<p>C\u00edlem propojen\u00ed z na\u0161eho datacentra do telehouse v Praze je samoz\u0159ejm\u011b mo\u017enost propojit se s dal\u0161\u00edmi s\u00edt\u011bmi, jejich\u017e koncentrace je pr\u00e1v\u011b v telehouse SITEL asi nejv\u011bt\u0161\u00ed.<\/p>\n\n\n\n<p>Zde se propoj\u00edme samoz\u0159ejm\u011b do&nbsp;<strong>NIXu<\/strong>, co\u017e je \u010desk\u00fd peeringov\u00fd uzel, kde je mo\u017en\u00e9 se p\u0159\u00edmo propojit se v\u0161emi \u010desk\u00fdmi s\u00edt\u011bmi a ISP a n\u011bkter\u00fdmi zahrani\u010dn\u00edmi (<a href=\"http:\/\/www.nix.cz\/\" target=\"_blank\" rel=\"noopener\">www.nix.cz<\/a>). Tudy n\u00e1m pote\u010de z\u0159ejm\u011b nejv\u00edce dat. St\u00e1t se \u010dleny organizace NIX m\u00e1me v pl\u00e1nu v pr\u016fb\u011bhu srpna.<\/p>\n\n\n\n<p>Samoz\u0159ejm\u011b se d\u00e1le na SITELu propoj\u00edme s minim\u00e1ln\u011b jedn\u00edm&nbsp;<strong>tranzitn\u00edm oper\u00e1torem<\/strong>, kter\u00fd na\u0161i s\u00ed\u0165 propoj\u00ed do zbytku Internetu. Tranzitn\u00ed oper\u00e1tory m\u00e1me rozjednan\u00e9, rozhodnut\u00ed padne v pr\u016fb\u011bhu srpna.<\/p>\n\n\n\n<p>Na SITELu bude um\u00edst\u011bn jeden ze 2 hlavn\u00edch router\u016f, pro propojen\u00ed s dal\u0161\u00edmi s\u00edt\u011bmi bude samoz\u0159ejm\u011b vyu\u017e\u00edvat routovac\u00ed protokol&nbsp;<strong>BGP<\/strong>. Druh\u00fd hlavn\u00ed router skon\u010d\u00ed v dal\u0161\u00edm telehouse v Praze, kde bude op\u011bt propojen do NIXu a k n\u011bjak\u00e9mu druh\u00e9mu tranzitn\u00edmu oper\u00e1torovi.<\/p>\n\n\n\n<p>Cel\u00e1 s\u00ed\u0165 bude s vyu\u017eit\u00edm protokol\u016f OSPF a BGP samoz\u0159ejm\u011b nakonfigurov\u00e1na tak, aby ji nepolo\u017eil v\u00fdpadek jak\u00e9koliv jej\u00ed \u010d\u00e1sti \u010di jak\u00e9hokoliv za\u0159\u00edzen\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Z\u00e1kladem kvalitn\u00edch internetov\u00fdch slu\u017eeb je dobr\u00e1 konektivita, tedy propojen\u00ed na\u0161\u00ed s\u00edt\u011b z datov\u00e9ho centra do Internetu, a spr\u00e1vn\u011b nastaven\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165, kter\u00e1 se vyrovn\u00e1 s poruchami a v\u00fdpadky.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[],"class_list":["post-41517","post","type-post","status-publish","format-standard","hentry","category-datacentra"],"_links":{"self":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/41517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/comments?post=41517"}],"version-history":[{"count":1,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/41517\/revisions"}],"predecessor-version":[{"id":41523,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/41517\/revisions\/41523"}],"wp:attachment":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/media?parent=41517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/categories?post=41517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/tags?post=41517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}