{"id":354,"date":"2016-01-08T12:29:27","date_gmt":"2016-01-08T12:29:27","guid":{"rendered":"http:\/\/www.haxed.me.uk\/?p=354"},"modified":"2016-01-08T12:29:27","modified_gmt":"2016-01-08T12:29:27","slug":"checking-for-retransmission","status":"publish","type":"post","link":"https:\/\/haxed.me.uk\/index.php\/2016\/01\/08\/checking-for-retransmission\/","title":{"rendered":"Checking for Network packet Retransmission , troubleshooting network card & switches"},"content":{"rendered":"

So, you might want to test whether the NIC of your box is ‘bad’, one way to do this is looking at the retransmissions.<\/p>\n

\r\nnetstat -s | grep retransmits\r\n   3535665 fast retransmits\r\n   3920918 forward retransmits\r\n   122319 retransmits in slow start\r\n   3652 sack retransmits failed\r\n<\/pre>\n
\r\nnetstat -s | grep transmit\r\n    10512472 segments retransmited\r\n    733 times recovered from packet loss due to fast retransmit\r\n    Detected reordering 73 times using reno fast retransmit\r\n    TCPLostRetransmit: 196\r\n    400 timeouts after reno fast retransmit\r\n    3535665 fast retransmits\r\n    3920918 forward retransmits\r\n    122319 retransmits in slow start\r\n    13652 sack retransmits failed\r\n<\/pre>\n
This isn’t much use though, because you need to see how many total packets come in:<\/p>\n
\r\nnetstat -s | grep total\r\n    23799703342 total packets received\r\n<\/pre>\n
It’s possible to get the full details with netstat -s , naturally.<\/p>\n","protected":false},"excerpt":{"rendered":"
So, you might want to test whether the NIC of your box is ‘bad’, one way to do this is looking at the retransmissions. netstat -s | grep retransmits 3535665 fast retransmits 3920918 forward retransmits 122319 retransmits in slow start … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-354","post","type-post","status-publish","format-standard","hentry","category-uncategorised"],"_links":{"self":[{"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/posts\/354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/comments?post=354"}],"version-history":[{"count":1,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/posts\/354\/revisions"}],"predecessor-version":[{"id":355,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/posts\/354\/revisions\/355"}],"wp:attachment":[{"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/media?parent=354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/categories?post=354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haxed.me.uk\/index.php\/wp-json\/wp\/v2\/tags?post=354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}