You mean that I have to send keep-alive packet to switch and hub to get response ? if no response, it should be break up ?
-----Original Message----- From: lwip-users-bounces+vincent.cui=enlogic....@nongnu.org [mailto:lwip-users-bounces+vincent.cui=enlogic....@nongnu.org] On Behalf Of Krzysztof Weso?owski Sent: 2012年8月22日 4:44 To: Mailing list for lwIP users Subject: Re: [lwip-users] how to detect cable down in this case On Tue, Aug 21, 2012 at 10:38 PM, Bill Auerbach <bauerb...@arrayonline.com> wrote: > I think he means if you are connected to a switch and the connection to > another device on the switch is removed. In this case there is no loss of > link since the switch maintains that but there is a loss of connection. Now I see, i have to often used config when other end was other end of physical cable ;) There where sevaral topics about detecting connection break, with techniques like Keep-Alive Packets mentioned. TCP/IP itself is capable of delivering packets in connection even when physical link was down between them, sothere is no simple/ultimate "other plug out" on this layer. Regards, Krzysztof Wesołowski _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
