{"id":16094,"date":"2026-04-20T09:12:19","date_gmt":"2026-04-20T02:12:19","guid":{"rendered":"https:\/\/sgpho.com\/?p=16094"},"modified":"2026-07-05T14:56:53","modified_gmt":"2026-07-05T14:56:53","slug":"cach-khoi-phuc-mat-khau-cho-dong-catalyst-4500-4000-su-dung-supervisor-engine-iii-iv-v-7-e-8-e","status":"publish","type":"post","link":"https:\/\/draff.sieuthitinhoc.com\/index.php\/2026\/04\/20\/cach-khoi-phuc-mat-khau-cho-dong-catalyst-4500-4000-su-dung-supervisor-engine-iii-iv-v-7-e-8-e\/","title":{"rendered":"C\u00e1ch kh\u00f4i ph\u1ee5c m\u1eadt kh\u1ea9u cho d\u00f2ng Catalyst 4500\/4000 s\u1eed d\u1ee5ng Supervisor Engine III\/IV\/V\/7-E\/8-E"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 1:<\/strong> Truy c\u1eadp ch\u1ebf \u0111\u1ed9 ROMmon<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft n\u1ed1i m\u00e1y t\u00ednh v\u1edbi c\u1ed5ng Console c\u1ee7a Switch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eaft v\u00e0 b\u1eadt l\u1ea1i ngu\u1ed3n thi\u1ebft b\u1ecb (Power cycle).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong v\u00f2ng 5 gi\u00e2y \u0111\u1ea7u khi m\u00e1y \u0111ang kh\u1edfi \u0111\u1ed9ng, nh\u1ea5n Ctrl-C \u0111\u1ec3 ng\u1eaft qu\u00e1 tr\u00ecnh autoboot. M\u00e0n h\u00ecnh s\u1ebd hi\u1ec7n d\u1ea5u nh\u1eafc rommon 1 &gt;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 2:<\/strong> Thi\u1ebft l\u1eadp l\u1edd \u0111i c\u1ea5u h\u00ecnh c\u0169 (Ignore Configuration)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i d\u1ea5u nh\u1eafc ROMmon, b\u1ea1n c\u00f3 hai c\u00e1ch:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch nhanh: G\u00f5 l\u1ec7nh confreg 0x2142.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch th\u1ee7 c\u00f4ng (D\u00f9ng l\u1ec7nh confreg):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f5 confreg v\u00e0 nh\u1ea5n Enter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ea3 l\u1eddi y (yes) cho c\u00e2u h\u1ecfi: do you wish to change the configuration?.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ea3 l\u1eddi y (yes) cho c\u00e2u h\u1ecfi: enable &#8220;ignore system config info&#8221;?.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e2u h\u1ecfi c\u00f2n l\u1ea1i ch\u1ecdn n (no).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau c\u00f9ng ch\u1ecdn y (yes) \u0111\u1ec3 l\u01b0u c\u1ea5u h\u00ecnh n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 3:<\/strong> Kh\u1edfi \u0111\u1ed9ng l\u1ea1i thi\u1ebft b\u1ecb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f5 l\u1ec7nh reset t\u1ea1i d\u1ea5u nh\u1eafc ROMmon. Thi\u1ebft b\u1ecb s\u1ebd kh\u1edfi \u0111\u1ed9ng l\u1ea1i m\u00e0 kh\u00f4ng n\u1ea1p t\u1ec7p c\u1ea5u h\u00ecnh c\u0169 (n\u00ean s\u1ebd kh\u00f4ng h\u1ecfi m\u1eadt kh\u1ea9u).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 4:<\/strong> Kh\u00f4i ph\u1ee5c c\u1ea5u h\u00ecnh v\u00e0 \u0111\u1ed5i m\u1eadt kh\u1ea9u<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi m\u00e1y kh\u1edfi \u0111\u1ed9ng xong:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ecdn no khi m\u00e1y h\u1ecfi c\u00f3 mu\u1ed1n v\u00e0o &#8220;initial configuration dialog&#8221; kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f5 enable \u0111\u1ec3 v\u00e0o ch\u1ebf \u0111\u1ed9 \u0111\u1eb7c quy\u1ec1n (l\u00fac n\u00e0y kh\u00f4ng c\u1ea7n m\u1eadt kh\u1ea9u).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ef1c k\u1ef3 quan tr\u1ecdng: N\u1ea1p l\u1ea1i c\u1ea5u h\u00ecnh c\u0169 v\u00e0o RAM b\u1eb1ng l\u1ec7nh:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">copy startup-config running-config<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(L\u00fac n\u00e0y t\u00ean Switch c\u0169 s\u1ebd hi\u1ec7n l\u1ea1i).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7t m\u1eadt kh\u1ea9u m\u1edbi:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bash<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">configure terminal<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">no enable secret<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">enable secret &lt;m\u1eadt_kh\u1ea9u_m\u1edbi&gt;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 5:<\/strong> Tr\u1ea3 thanh ghi v\u1ec1 m\u1eb7c \u0111\u1ecbnh v\u00e0 l\u01b0u<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n ph\u1ea3i \u0111\u01b0a thanh ghi v\u1ec1 gi\u00e1 tr\u1ecb chu\u1ea9n \u0111\u1ec3 m\u00e1y ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng \u1edf l\u1ea7n kh\u1edfi \u0111\u1ed9ng sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f5 l\u1ec7nh: config-register 0x2102.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tho\u00e1t ra ngo\u00e0i v\u00e0 l\u01b0u l\u1ea1i to\u00e0n b\u1ed9 thay \u0111\u1ed5i:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bash<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">end<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">write memory<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 6:<\/strong> Ki\u1ec3m tra<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f5 show version \u0111\u1ec3 ki\u1ec3m tra d\u00f2ng cu\u1ed1i c\u00f9ng, n\u00f3 ph\u1ea3i b\u00e1o: Configuration register is 0x2102.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u01b0u \u00fd: N\u1ebfu thi\u1ebft b\u1ecb c\u00f3 c\u00e1c c\u1ed5ng (interfaces) b\u1ecb \u1edf tr\u1ea1ng th\u00e1i &#8220;down&#8221;, h\u00e3y v\u00e0o t\u1eebng c\u1ed5ng v\u00e0 g\u00f5 no shutdown v\u00ec \u0111\u00f4i khi qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0m c\u00e1c c\u1ed5ng b\u1ecb kh\u00f3a t\u1ea1m th\u1eddi.<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a4aa822a6c5f&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a4aa822a6c5f\" class=\"wp-block-image aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"814\" height=\"482\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata1.jpg\" alt=\"\" class=\"wp-image-16096\" srcset=\"https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata1.jpg 814w, https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata1-300x178.jpg 300w, https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata1-768x455.jpg 768w\" sizes=\"auto, (max-width: 814px) 100vw, 814px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a4aa822a6f36&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a4aa822a6f36\" class=\"wp-block-image aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1191\" height=\"698\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata-2.jpg\" alt=\"\" class=\"wp-image-16095\" srcset=\"https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata-2.jpg 1191w, https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata-2-300x176.jpg 300w, https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata-2-1024x600.jpg 1024w, https:\/\/draff.sieuthitinhoc.com\/wp-content\/uploads\/2026\/04\/cata-2-768x450.jpg 768w\" sizes=\"auto, (max-width: 1191px) 100vw, 1191px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Theo: Anh Nguyen Hoang<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u01b0\u1edbc 1: Truy c\u1eadp ch\u1ebf \u0111\u1ed9 ROMmon K\u1ebft n\u1ed1i m\u00e1y t\u00ednh v\u1edbi c\u1ed5ng Console c\u1ee7a Switch. T\u1eaft v\u00e0 b\u1eadt l\u1ea1i ngu\u1ed3n thi\u1ebft b\u1ecb (Power cycle). Trong v\u00f2ng 5 gi\u00e2y \u0111\u1ea7u khi m\u00e1y \u0111ang kh\u1edfi \u0111\u1ed9ng, nh\u1ea5n Ctrl-C \u0111\u1ec3 ng\u1eaft qu\u00e1 tr\u00ecnh autoboot. M\u00e0n h\u00ecnh s\u1ebd hi\u1ec7n d\u1ea5u nh\u1eafc rommon 1 &gt;. B\u01b0\u1edbc 2: Thi\u1ebft l\u1eadp [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16095,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[307,32],"tags":[78,85,150],"class_list":["post-16094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-export","category-he-thong","tag-catalyst","tag-cisco","tag-khoi-phuc-mat-khau"],"_links":{"self":[{"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/posts\/16094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/comments?post=16094"}],"version-history":[{"count":1,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/posts\/16094\/revisions"}],"predecessor-version":[{"id":18428,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/posts\/16094\/revisions\/18428"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/media\/16095"}],"wp:attachment":[{"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/media?parent=16094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/categories?post=16094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/draff.sieuthitinhoc.com\/index.php\/wp-json\/wp\/v2\/tags?post=16094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}