{"id":179,"date":"2021-12-10T05:48:48","date_gmt":"2021-12-10T05:48:48","guid":{"rendered":"https:\/\/jazchye.com\/?p=179"},"modified":"2021-12-10T05:49:13","modified_gmt":"2021-12-10T05:49:13","slug":"maximum-mtu-mru-values-ingwn7000-network-interfaces","status":"publish","type":"post","link":"https:\/\/jazchye.com\/index.php\/2021\/12\/10\/maximum-mtu-mru-values-ingwn7000-network-interfaces\/","title":{"rendered":"Maximum MTU\/MRU values in GWN7000 network interfaces"},"content":{"rendered":"\n<p>Improper MTU\/MRU settings will lead to fragmentation and will directly affect the network transmission speed. Here is the max value for each type of transport in  <a href=\"https:\/\/www.grandstream.com\/products\/networking-solutions\/gigabit-routers\/product\/gwn7000?hsLang=en\" title=\"https:\/\/www.grandstream.com\/products\/networking-solutions\/gigabit-routers\/product\/gwn7000?hsLang=en\">GWN7000<\/a> &#8211; <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Ethernet MinSize = 512bit = 64 Byte\n\nEthernet MaxSize = 1518 Byte\n\nso Ethernet IP MTU = 1518 - 18 ( 6 SRCMAC+ 6 DSTMAC+ 2 TYPE+ 4 CRC) = 1500 B\n\nso Ethernet IP TCP MSS = 1500 - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1460 B\n\nso Ethernet IP UDP MTU\/MRU = 1500 - 28 ( 20 IP_HEADER + 8 UDP_HEADER ) = 1472 B\n\nso PPPoE MTU\/MRU = 1500 - 8 ( 6 PPPoE_SESSION + 2 PPP_HEADER ) = 1492 B\n\nso TCP over PPPoE MSS = 1492 ( PPPoE MTU\/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1452\n\nso PPTP MTU\/MRU = 1500 - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1444 B\n\nso TCP over PPTP MSS = 1444 ( PPTP MTU\/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1404\n\nso L2TP MTU\/MRU = 1500 - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1460 B\n\nso TCP over L2TP MSS = 1460 ( L2TP MTU\/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1420 B\n\nso PPTP over PPPoE MTU\/MRU = 1492 ( PPPoE MTU\/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1436 B\n\nso PPTP over PPTP MTU\/MRU = 1444 ( PPTP MTU\/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1388 B\n\nso PPTP over L2TP MTU\/MRU = 1460 ( L2TP MTU\/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1404 B\n\nso L2TP over PPPoE MTU\/MRU = 1492 ( PPPoE MTU\/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1452 B\n\nso L2TP over PPTP MTU\/MRU = 1444 ( PPTP MTU\/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1404 B\n\nso L2TP over L2TP MTU\/MRU = 1460 ( L2TP MTU\/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1420 B<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Improper MTU\/MRU settings will lead to fragmentation and will directly affect the network transmission speed. Here is the max value for each type of transport&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-179","post","type-post","status-publish","format-standard","hentry","category-gwn-routers"],"_links":{"self":[{"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/posts\/179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/comments?post=179"}],"version-history":[{"count":2,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/posts\/179\/revisions"}],"predecessor-version":[{"id":181,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/posts\/179\/revisions\/181"}],"wp:attachment":[{"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/media?parent=179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/categories?post=179"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jazchye.com\/index.php\/wp-json\/wp\/v2\/tags?post=179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}