Hello Ns-Users, I am simulating Large Ethernet LAN over ns2 and wanted to trace packets that are ready to be send in to the channel. Since ns2 does not support this type of trace I have to change the code of mac-802_3.cc to know when and which packets are ready to be dumped in to the channel.
Following is the code in mac-802_3.cc:: hdr_cmn *th = hdr_cmn::access(p); hdr_mac *mh= HDR_MAC(p); mytrace<<"+2"<<"\t\t"<<th->uid()<<"\t\t"<<(Scheduler::instance().clock())<<"\t\t"<<t<<"\t\t"<<th->size()<<"\t\t"<<mh->macDA()<<"\t\t"<<mh->macSA()<<'\n'; Following are my specification of network:: Bandwidth of the LAN: 10Mb Number of nodes: 2002 Delay: 0.025ms 1001 nodes are cbr agents and 1001 nodes are null. Following line is used to make LAN:: set lan_ [$ns make-lan -trace on $nodelist 10Mb .025ms LL Queue/DropTail Mac/802_3 Channel Phy/WiredPhy ] I am Simulating just for 5 seconds and after around 3.4 seconds or so I started getting th->uid() as negative. And the uid of the packet just before negative uid is 2147453588. Please point me where I am going wrong. I would greatly appreciate any suggestions. Thanks, Regards, Amit Soni email id: [EMAIL PROTECTED]
