{"id":1848,"date":"2019-06-21T04:51:35","date_gmt":"2019-06-21T04:51:35","guid":{"rendered":"https:\/\/www.thegioimaychu.vn\/blog\/?p=1848"},"modified":"2019-06-21T05:05:30","modified_gmt":"2019-06-21T05:05:30","slug":"software-defined-networks-sdn-la-gi","status":"publish","type":"post","link":"https:\/\/thegioimaychu.vn\/blog\/tong-hop\/software-defined-networks-sdn-la-gi-p1848\/","title":{"rendered":"Software Defined Networking l\u00e0 g\u00ec?"},"content":{"rendered":"<style>.iblink{color:#975!important;}.iblink:hover{color:orange!important;}<\/style><h3>SDN l\u00e0 g\u00ec?<\/h3>\n<p>Software-Defined Networking (SDN) l\u00e0 m\u1ed9t ki\u1ebfn tr\u00fac nh\u1eb1m m\u1ee5c \u0111\u00edch l\u00e0m cho c\u00e1c m\u1ea1ng tr\u1edf n\u00ean linh ho\u1ea1t h\u01a1n, m\u1ee5c ti\u00eau c\u1ee7a Software-Defined Networking (SDN) l\u00e0 cho ph\u00e9p c\u00e1c k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi <a class=\"iblink\" href=\"\/blog\/ao-hoa\/morpheus-data-giai-phap-xay-dung-cloud-thay-the-cho-vmware-vra-p14346\/\">qu\u1ea3n tr\u1ecb cloud<\/a> v\u00e0 m\u1ea1ng nhanh ch\u00f3ng \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kinh doanh thay \u0111\u1ed5i th\u00f4ng qua m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1eadp trung. Trong SDN, k\u1ef9 s\u01b0 ho\u1eb7c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u1ecbnh h\u00ecnh l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u1eeb b\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1eadp trung m\u00e0 kh\u00f4ng ph\u1ea3i thi\u1ebft l\u1eadp tr\u00ean t\u1eebng thi\u1ebft b\u1ecb ri\u00eang l\u1ebb trong m\u1ea1ng. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n SDN t\u1eadp trung qu\u1ea3n l\u00fd c\u00e1c thi\u1ebft b\u1ecb cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng b\u1ea5t c\u1ee9 khi n\u00e0o ch\u00fang c\u1ea7n, b\u1ea5t k\u1ec3 c\u00e1c lo\u1ea1i k\u1ebft n\u1ed1i n\u00e0o gi\u1eefa server v\u00e0 thi\u1ebft b\u1ecb. Qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0 m\u1ed9t b\u01b0\u1edbc \u0111i t\u1eeb ki\u1ebfn tr\u00fac m\u1ea1ng truy\u1ec1n th\u1ed1ng, trong \u0111\u00f3 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng ri\u00eang l\u1ebb \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh l\u01b0u l\u01b0\u1ee3ng d\u1ef1a tr\u00ean c\u00e1c b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn \u0111\u01b0\u1ee3c \u0111\u1ecbnh c\u1ea5u h\u00ecnh c\u1ee7a ch\u00fang. SDN bao g\u1ed3m nhi\u1ec1u lo\u1ea1i c\u00f4ng ngh\u1ec7 m\u1ea1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u00fap m\u1ea1ng tr\u1edf n\u00ean linh ho\u1ea1t h\u01a1n \u0111\u1ec3 h\u1ed7 tr\u1ee3 \u1ea3o h\u00f3a v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng l\u01b0u tr\u1eef c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i.<\/p>\n<figure style=\"width: 590px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2019\/06\/traditional-software-defined-590x245.png\" alt=\"\" width=\"590\" height=\"245\" \/><figcaption class=\"wp-caption-text\">So s\u00e1nh ki\u1ebfn tr\u00fac gi\u1eefa m\u1ea1ng truy\u1ec1n th\u1ed1ng v\u00e0 m\u1ea1ng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1eb1ng ph\u1ea7n m\u1ec1m (Software-defined Network)<\/figcaption><\/figure>\n<h3>Ki\u1ebfn tr\u00fac SDN<\/h3>\n<p>M\u1ed9t \u0111\u1ea1i di\u1ec7n \u0111i\u1ec3n h\u00ecnh c\u1ee7a ki\u1ebfn \u200b\u200btr\u00fac SDN bao g\u1ed3m ba l\u1edbp: l\u1edbp \u1ee9ng d\u1ee5ng, l\u1edbp \u0111i\u1ec1u khi\u1ec3n v\u00e0 l\u1edbp c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng.<\/p>\n<p>Ba l\u1edbp n\u00e0y giao ti\u1ebfp b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c giao di\u1ec7n l\u1eadp tr\u00ecnh (API) b\u1eafc v\u00e0 nam t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<h3>SDN ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>C\u00e1c nh\u00e0 cung c\u1ea5p SDN cung c\u1ea5p nhi\u1ec1u l\u1ef1a ch\u1ecdn ki\u1ebfn \u200b\u200btr\u00fac c\u1ea1nh tranh, nh\u01b0ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t, SDN t\u00e1ch ri\u00eang c\u00e1c control plane ph\u00e2n t\u00e1n (distributed) t\u1eeb c\u00e1c forwarding plane v\u00e0 \u0111\u01b0a (offload) c\u00e1c ch\u1ee9c n\u0103ng c\u1ee7a control plane v\u00e0o trong control plane t\u1eadp trung (centralized). Control plane v\u00e0 forwarding plane l\u00e0 2 d\u1ea1ng ti\u1ebfn tr\u00ecnh\u00a0m\u00e0 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u0111\u1ec1u th\u1ef1c hi\u1ec7n. C\u00f3 m\u1ed9t s\u1ed1 phi\u00ean b\u1ea3n c\u1ee7a SDN nh\u01b0ng t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i ph\u00e1p SDN \u0111\u1ec1u bao g\u1ed3m ba l\u1edbp: l\u1edbp \u1ee9ng d\u1ee5ng, l\u1edbp \u0111i\u1ec1u khi\u1ec3n v\u00e0 l\u1edbp c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng.<\/p>\n<p>L\u1edbp \u1ee9ng d\u1ee5ng ch\u1ee9a c\u00e1c \u1ee9ng d\u1ee5ng ho\u1eb7c ch\u1ee9c n\u0103ng m\u1ea1ng \u0111i\u1ec3n h\u00ecnh m\u00e0 c\u00e1c t\u1ed5 ch\u1ee9c s\u1eed d\u1ee5ng, c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp, c\u00e2n b\u1eb1ng t\u1ea3i ho\u1eb7c t\u01b0\u1eddng l\u1eeda. Trong m\u1ed9t m\u1ea1ng truy\u1ec1n th\u1ed1ng s\u1ebd s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng, nh\u01b0 t\u01b0\u1eddng l\u1eeda ho\u1eb7c c\u00e2n b\u1eb1ng t\u1ea3i, SDN s\u1ebd thay th\u1ebf thi\u1ebft b\u1ecb \u0111\u00f3 b\u1eb1ng m\u1ed9t \u1ee9ng d\u1ee5ng s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 qu\u1ea3n l\u00fd \u201ch\u00e0nh vi\u201d c\u1ee7a data plane.<\/p>\n<p>L\u1edbp \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea1i di\u1ec7n cho ph\u1ea7n m\u1ec1m \u0111i\u1ec1u khi\u1ec3n SDN t\u1eadp trung ho\u1ea1t \u0111\u1ed9ng nh\u01b0 b\u1ed9 n\u00e3o c\u1ee7a SDN. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n n\u00e0y n\u1eb1m tr\u00ean m\u1ed9t m\u00e1y ch\u1ee7 v\u00e0 qu\u1ea3n l\u00fd c\u00e1c ch\u00ednh s\u00e1ch v\u00e0 lu\u1ed3ng l\u01b0u l\u01b0\u1ee3ng tr\u00ean to\u00e0n m\u1ea1ng.<\/p>\n<ul>\n<li>APIs Nam: SDN s\u1eed d\u1ee5ng API nam \u0111\u1ec3 chuy\u1ec3n th\u00f4ng tin \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb Router v\u00e0 Switch \u201cb\u00ean d\u01b0\u1edbi\u201d. M\u1ed9t s\u1ed1 ng\u01b0\u1eddi th\u01b0\u1eddng ngh\u0129 OpenFlow l\u00e0 \u0111\u1ed3ng ngh\u0129a v\u1edbi SDN, nh\u01b0ng n\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 duy nh\u1ea5t trong ki\u1ebfn tr\u00fac SDN t\u1ed5ng th\u1ec3. OpenFlow l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n m\u1edf cho giao th\u1ee9c truy\u1ec1n th\u00f4ng cho ph\u00e9p control plane t\u01b0\u01a1ng t\u00e1c v\u1edbi forwarding plane. C\u1ea7n l\u01b0u \u00fd r\u1eb1ng OpenFlow kh\u00f4ng ph\u1ea3i l\u00e0 giao th\u1ee9c duy nh\u1ea5t c\u00f3 s\u1eb5n ho\u1eb7c \u0111ang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n cho SDN.<\/li>\n<li>API B\u1eafc: SDN s\u1eed d\u1ee5ng API b\u1eafc \u0111\u1ec3 giao ti\u1ebfp v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u201c\u1edf ph\u00eda tr\u00ean\u201d v\u1ec1 m\u1eb7t logic. C\u00e1c \u0111i\u1ec1u n\u00e0y gi\u00fap qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0 tri\u1ec3n khai c\u00e1c d\u1ecbch v\u1ee5 nhanh ch\u00f3ng.<\/li>\n<\/ul>\n<p>L\u1edbp c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb c\u00e1c thi\u1ebft b\u1ecb v\u1eadt l\u00fd trong m\u1ea1ng.<\/p>\n<h3>L\u1ee3i \u00edch c\u1ee7a c\u00e1c gi\u1ea3i ph\u00e1p SDN<\/h3>\n<p>SDN cung c\u1ea5p m\u1ed9t m\u1ea1ng t\u1eadp trung, c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh, c\u00f3 th\u1ec3 cung c\u1ea5p h\u1ec7 th\u1ed1ng m\u1ea1ng linh \u0111\u1ed9ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c nhu c\u1ea7u thay \u0111\u1ed5i c\u1ee7a c\u00e1c doanh nghi\u1ec7p. V\u1edbi SDN, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 thay \u0111\u1ed5i b\u1ea5t k\u1ef3 quy t\u1eafc chuy\u1ec3n \u0111\u1ed5i m\u1ea1ng n\u00e0o khi c\u1ea7n thi\u1ebft, c\u00f4 l\u1eadp ho\u1eb7c th\u1eadm ch\u00ed ch\u1eb7n c\u00e1c lo\u1ea1i g\u00f3i c\u1ee5 th\u1ec3 v\u1edbi m\u1ee9c \u0111\u1ed9 ki\u1ec3m so\u00e1t v\u00e0 b\u1ea3o m\u1eadt c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong ki\u1ebfn \u200b\u200btr\u00fac c\u00f3 nhi\u1ec1u nh\u00e0 cung c\u1ea5p cloud, b\u1edfi v\u00ec n\u00f3 cho ph\u00e9p ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n. V\u1ec1 c\u01a1 b\u1ea3n, \u0111i\u1ec1u n\u00e0y cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u00edt t\u1ed1n k\u00e9m h\u01a1n v\u00e0 c\u00f3 quy\u1ec1n ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng nhi\u1ec1u h\u01a1n. N\u00f3 c\u0169ng cung c\u1ea5p c\u00e1c l\u1ee3i \u00edch k\u1ef9 thu\u1eadt v\u00e0 kinh doanh:<\/p>\n<ul>\n<li>Thi\u1ebft l\u1eadp tr\u1ef1c ti\u1ebfp: Ch\u00ednh s\u00e1ch m\u1ea1ng SDN \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp tr\u1ef1c ti\u1ebfp v\u00ec c\u00e1c ch\u1ee9c n\u0103ng \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c t\u00e1ch r\u1eddi kh\u1ecfi c\u00e1c ch\u1ee9c n\u0103ng chuy\u1ec3n ti\u1ebfp, cho ph\u00e9p m\u1ea1ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh theo ch\u01b0\u01a1ng tr\u00ecnh b\u1edfi c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng h\u00f3a ngu\u1ed3n m\u1edf ho\u1eb7c \u0111\u1ed9c quy\u1ec1n, bao g\u1ed3m OpenStack, Puppet v\u00e0 Chef.<\/li>\n<li>Qu\u1ea3n l\u00fd t\u1eadp trung: M\u1ea1ng th\u00f4ng minh \u0111\u01b0\u1ee3c t\u1eadp trung m\u1ed9t c\u00e1ch logic trong ph\u1ea7n m\u1ec1m \u0111i\u1ec1u khi\u1ec3n SDN duy tr\u00ec ch\u1ebf \u0111\u1ed9 xem to\u00e0n h\u1ec7 th\u1ed1ng c\u1ee7a m\u1ea1ng, nh\u01b0 m\u1ed9t \u1ee9ng d\u1ee5ng.<\/li>\n<li>Gi\u1ea3m CapEx: SDN c\u00f3 kh\u1ea3 n\u0103ng h\u1ea1n ch\u1ebf nhu c\u1ea7u mua ph\u1ea7n c\u1ee9ng m\u1ea1ng, d\u1ef1a tr\u00ean ASIC v\u00e0 thay v\u00e0o \u0111\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c m\u00f4 h\u00ecnh tr\u1ea3 ti\u1ec1n khi c\u1ea7n ph\u00e1t tri\u1ec3n<\/li>\n<li>Gi\u1ea3m OpEX: SDN cho ph\u00e9p ki\u1ec3m so\u00e1t thu\u1eadt to\u00e1n m\u1ea1ng c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng (nh\u01b0 Router\/Switch\/Hardware) gi\u00fap cho vi\u1ec7c thi\u1ebft k\u1ebf, tri\u1ec3n khai, qu\u1ea3n l\u00fd v\u00e0 m\u1edf r\u1ed9ng m\u1ea1ng d\u1ec5 d\u00e0ng h\u01a1n. Kh\u1ea3 n\u0103ng t\u1ef1 \u0111\u1ed9ng h\u00f3a, t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c cung c\u1ea5p v\u00e0 \u0111i\u1ec1u ph\u1ed1i t\u00ednh kh\u1ea3 d\u1ee5ng v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1ecbch v\u1ee5 b\u1eb1ng c\u00e1ch gi\u1ea3m th\u1eddi gian qu\u1ea3n l\u00fd chung v\u00e0 c\u00e1c l\u1ed7i do y\u1ebfu t\u1ed1 con ng\u01b0\u1eddi.<\/li>\n<li>Cung c\u1ea5p s\u1ef1 linh ho\u1ea1t: SDN gi\u00fap c\u00e1c t\u1ed5 ch\u1ee9c tri\u1ec3n khai nhanh ch\u00f3ng c\u00e1c \u1ee9ng d\u1ee5ng, d\u1ecbch v\u1ee5 v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1edbi \u0111\u1ec3 nhanh ch\u00f3ng \u0111\u00e1p \u1ee9ng c\u00e1c m\u1ee5c ti\u00eau kinh doanh thay \u0111\u1ed5i.<\/li>\n<li>K\u00edch ho\u1ea1t \u0110\u1ed5i m\u1edbi: SDN cho ph\u00e9p c\u00e1c t\u1ed5 ch\u1ee9c t\u1ea1o c\u00e1c lo\u1ea1i \u1ee9ng d\u1ee5ng, d\u1ecbch v\u1ee5 v\u00e0 m\u00f4 h\u00ecnh kinh doanh m\u1edbi c\u00f3 th\u1ec3 cung c\u1ea5p lu\u1ed3ng doanh thu m\u1edbi v\u00e0 nhi\u1ec1u gi\u00e1 tr\u1ecb h\u01a1n t\u1eeb m\u1ea1ng.<\/li>\n<\/ul>\n<p>Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng ch\u1ec9 c\u1ea7n thao t\u00e1c v\u1edbi m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n trung t\u00e2m \u0111\u1ec3 ph\u00e2n ph\u1ed1i c\u00e1c ch\u00ednh s\u00e1ch cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, thay v\u00ec ph\u1ea3i c\u1ea5u h\u00ecnh nhi\u1ec1u thi\u1ebft b\u1ecb ri\u00eang l\u1ebb. Kh\u1ea3 n\u0103ng n\u00e0y c\u0169ng l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf b\u1ea3o m\u1eadt v\u00ec b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 gi\u00e1m s\u00e1t l\u01b0u l\u01b0\u1ee3ng v\u00e0 tri\u1ec3n khai c\u00e1c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt. V\u00ed d\u1ee5, n\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n th\u1ea5y l\u01b0u l\u01b0\u1ee3ng \u0111\u00e1ng ng\u1edd, n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ecbnh tuy\u1ebfn l\u1ea1i ho\u1eb7c th\u1ea3 c\u00e1c g\u00f3i. SDN c\u0169ng \u1ea3o h\u00f3a ph\u1ea7n c\u1ee9ng v\u00e0 d\u1ecbch v\u1ee5 tr\u01b0\u1edbc \u0111\u00e2y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u1ea7n c\u1ee9ng chuy\u00ean d\u1ee5ng, d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3m s\u1ef1 ph\u1ee5 thu\u1ed9c v\u00e0o ph\u1ea7n c\u1ee9ng v\u00e0 gi\u1ea3m chi ph\u00ed v\u1eadn h\u00e0nh.<\/p>\n<p>Ngo\u00e0i ra, SDN \u0111\u00e3 g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00f4ng ngh\u1ec7 Software Define Wide Area Network (SD-WAN). SD-WAN s\u1eed d\u1ee5ng kh\u00eda c\u1ea1nh \u1ea3o h\u00f3a c\u1ee7a c\u00f4ng ngh\u1ec7 SDN, tr\u1eebu t\u01b0\u1ee3ng h\u00f3a c\u00e1c li\u00ean k\u1ebft k\u1ebft n\u1ed1i c\u1ee7a m\u1ed9t t\u1ed5 ch\u1ee9c trong to\u00e0n b\u1ed9 m\u1ea1ng LAN c\u1ee7a n\u00f3 v\u00e0 t\u1ea1o ra m\u1ed9t m\u1ea1ng \u1ea3o c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 k\u1ebft n\u1ed1i n\u00e0o m\u00e0 Controller th\u1ea5y ph\u00f9 h\u1ee3p \u0111\u1ec3 truy\u1ec1n l\u01b0u l\u01b0\u1ee3ng.<\/p>\n<h3>SDN s\u1eed d\u1ee5ng khi n\u00e0o v\u00e0 t\u1ea1i sao l\u1ea1i s\u1eed d\u1ee5ng SDN?<\/h3>\n<p>Ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i, thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 <a class=\"iblink\" href=\"\/blog\/tag\/cloud-computing\/\">\u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y<\/a> \u0111ang \u0111\u1ea9y c\u00e1c m\u1ea1ng truy\u1ec1n th\u1ed1ng \u0111\u1ebfn gi\u1edbi h\u1ea1n c\u1ee7a ch\u00fang. T\u00ednh to\u00e1n v\u00e0 l\u01b0u tr\u1eef \u0111\u00e3 \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb nh\u1eefng \u0111\u1ed5i m\u1edbi \u0111\u00e1ng kinh ng\u1ea1c trong \u1ea3o h\u00f3a v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a, nh\u01b0ng nh\u1eefng l\u1ee3i \u00edch \u0111\u00f3 b\u1ecb h\u1ea1n ch\u1ebf b\u1edfi nh\u1eefng h\u1ea1n ch\u1ebf trong h\u1ec7 th\u1ed1ng m\u1ea1ng. \u00a0SDN c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch m\u1ea1ng h\u00f3a c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u c\u0169 b\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t c\u00e1ch linh ho\u1ea1t \u0111\u1ec3 ki\u1ec3m so\u00e1t m\u1ea1ng \u0111\u1ec3 n\u00f3 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 c\u00e1c phi\u00ean b\u1ea3n \u1ea3o h\u00f3a c\u1ee7a t\u00ednh to\u00e1n v\u00e0 l\u01b0u tr\u1eef ng\u00e0y nay.<\/p>\n<p>Nh\u01b0 \u0111\u00e3 n\u00f3i \u1edf tr\u00ean, SDN cung c\u1ea5p m\u1ed9t s\u1ed1 l\u1ee3i \u00edch cho c\u00e1c doanh nghi\u1ec7p \u0111ang c\u1ed1 g\u1eafng chuy\u1ec3n sang m\u00f4i tr\u01b0\u1eddng \u1ea3o. C\u00f3 v\u00f4 s\u1ed1 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng cho c\u00e1c t\u1ed5 ch\u1ee9c kh\u00e1c nhau, bao g\u1ed3m nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 <a class=\"iblink\" href=\"\/blog\/tag\/cloud-computing\/\">\u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y<\/a>, c\u0169ng nh\u01b0 c\u00e1c c\u01a1 s\u1edf doanh nghi\u1ec7p.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, SDN cung c\u1ea5p b\u0103ng th\u00f4ng theo y\u00eau c\u1ea7u, cung c\u1ea5p c\u00e1c \u0111i\u1ec1u khi\u1ec3n tr\u00ean c\u00e1c li\u00ean k\u1ebft nh\u00e0 cung c\u1ea5p \u0111\u1ec3 y\u00eau c\u1ea7u th\u00eam b\u0103ng th\u00f4ng khi c\u1ea7n thi\u1ebft, c\u0169ng nh\u01b0 t\u1ed1i \u01b0u h\u00f3a m\u1ea1ng. \u0110\u1ed1i v\u1edbi c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y, \u1ea3o h\u00f3a m\u1ea1ng cho nhi\u1ec1u \u0111\u01a1n v\u1ecb thu\u00ea l\u00e0 m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng quan tr\u1ecdng v\u00ec n\u00f3 cung c\u1ea5p vi\u1ec7c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean t\u1ed1t h\u01a1n v\u00e0 th\u1eddi gian quay v\u00f2ng nhanh h\u01a1n \u0111\u1ec3 t\u1ea1o m\u1ed9t m\u1ea1ng t\u00e1ch bi\u1ec7t. Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p khi s\u1eed d\u1ee5ng c\u00e1c ch\u00ednh s\u00e1ch gi\u00e1m s\u00e1t truy c\u1eadp SDN gi\u00fap cho vi\u1ec7c ki\u1ec3m so\u00e1t truy c\u1eadp v\u00e0 gi\u00e1m s\u00e1t m\u1ea1ng t\u1ed1t h\u01a1n.<\/p>\n<h3>Nh\u1eefng th\u00e1ch th\u1ee9c v\u1edbi SDN<\/h3>\n<p>B\u1ea3o m\u1eadt l\u00e0 c\u1ea3 quy\u1ec1n l\u1ee3i v\u00e0 m\u1ed1i quan t\u00e2m v\u1edbi c\u00f4ng ngh\u1ec7 SDN. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n trung t\u00e2m c\u1ee7a SDN s\u1eed d\u1ee5ng c\u00f3 m\u1ed9t \u0111i\u1ec3m y\u1ebfu duy nh\u1ea5t, n\u1ebfu b\u1ecb k\u1ebb t\u1ea5n c\u00f4ng nh\u1eafm m\u1ee5c ti\u00eau, c\u00f3 th\u1ec3 g\u00e2y t\u00ea li\u1ec7t cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng m\u1ea1ng.<\/p>\n<div>____<br \/><b>B\u00e0i vi\u1ebft li\u00ean quan<\/b><\/div>\n<ul>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=22819\">QNAP QSW-L3205-1C4T: Switch Lite-Managed b\u1ee9t ph\u00e1 t\u1ed1c \u0111\u1ed9 m\u1ea1ng 20Gbps<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21635\">Fibre Channel (FC): Tr\u1ee5c x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef hi\u1ec7u su\u1ea5t cao v\u00e0 tin c\u1eady<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21621\">M\u1ea1ng Ethernet: Gi\u1edbi thi\u1ec7u to\u00e0n di\u1ec7n v\u1ec1 c\u00e1c chu\u1ea9n k\u1ebft n\u1ed1i<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21044\">C\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 k\u1ebft n\u1ed1i m\u1ea1ng cho nh\u1eefng h\u1ec7 th\u1ed1ng HPC \u0111a node<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21031\">QNAP QSW-2104-2T-R2: Gi\u1ea3i ph\u00e1p m\u1ea1ng 10GbE t\u1ed1c \u0111\u1ed9 cao v\u1edbi chi ph\u00ed h\u1ee3p l\u00fd<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=15801\">3 l\u1ee3i \u00edch c\u1ee7a SDN \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng CNTT c\u1ee7a c\u00e1c doanh nghi\u1ec7p<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>SDN l&agrave; g&igrave;? Software-Defined Networking (SDN) l&agrave; m&#7897;t ki&#7871;n tr&uacute;c nh&#7857;m m&#7909;c &#273;&iacute;ch l&agrave;m cho c&aacute;c m&#7841;ng tr&#7903; n&ecirc;n linh ho&#7841;t h&#417;n, m&#7909;c ti&ecirc;u c&#7911;a Software-Defined Networking (SDN) l&agrave; cho ph&eacute;p c&aacute;c k&#7929; s&#432; v&agrave; ng&#432;&#7901;i qu&#7843;n tr&#7883; cloud v&agrave; m&#7841;ng nhanh ch&oacute;ng &#273;&aacute;p &#7913;ng c&aacute;c y&ecirc;u c&#7847;u kinh doanh thay &#273;&#7893;i th&ocirc;ng qua m&#7897;t&#8230;<\/p>\n","protected":false},"author":29,"featured_media":1857,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2,1],"tags":[682,25],"class_list":["post-1848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ao-hoa","category-tong-hop","tag-network","tag-software-defined"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Software Defined Networking l\u00e0 g\u00ec? - Blog | TheGioiMayChu<\/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:\/\/thegioimaychu.vn\/blog\/tong-hop\/software-defined-networks-sdn-la-gi-p1848\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Software Defined Networking l\u00e0 g\u00ec? - Blog | TheGioiMayChu\" \/>\n<meta name=\"twitter:description\" content=\"SDN l&agrave; g&igrave;? Software-Defined Networking (SDN) l&agrave; m&#7897;t ki&#7871;n tr&uacute;c nh&#7857;m m&#7909;c &#273;&iacute;ch l&agrave;m cho c&aacute;c m&#7841;ng tr&#7903; n&ecirc;n linh ho&#7841;t h&#417;n, m&#7909;c ti&ecirc;u c&#7911;a Software-Defined Networking (SDN) l&agrave; cho ph&eacute;p c&aacute;c k&#7929; s&#432; v&agrave; ng&#432;&#7901;i qu&#7843;n tr&#7883; cloud v&agrave; m&#7841;ng nhanh ch&oacute;ng &#273;&aacute;p &#7913;ng c&aacute;c y&ecirc;u c&#7847;u kinh doanh thay &#273;&#7893;i th&ocirc;ng qua m&#7897;t...\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2019\/06\/Untitled-Design-241.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"TGMC Blog\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/\"},\"author\":{\"name\":\"TGMC Blog\",\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/#\\\/schema\\\/person\\\/777f41403962330933a4fbcc80bec570\"},\"headline\":\"Software Defined Networking l\u00e0 g\u00ec?\",\"datePublished\":\"2019-06-21T04:51:35+00:00\",\"dateModified\":\"2019-06-21T05:05:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/\"},\"wordCount\":2545,\"publisher\":{\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/06\\\/Untitled-Design-241.jpg\",\"keywords\":[\"network\",\"software-defined\"],\"articleSection\":[\"\u1ea2o H\u00f3a\",\"T\u1ed5ng h\u1ee3p\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/\",\"url\":\"https:\\\/\\\/thegioimaychu.vn\\\/blog\\\/tong-hop\\\/software-defined-networks-sdn-la-gi-p1848\\\/\",\"name\":\"Software Defined Networking l\u00e0 g\u00ec? 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