Tham khảo tài liệu 'tcp/ip network administration- p13', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Appendix B A gated Reference Traces the list of interfaces read from the kernel. Use this to determine what interfaces are detected by the kernel interface scan. The advantage of placing a trace option on the command line is that it can trace activities that happen before the configuration file is processed. For the two options listed above this is an essential advantage. For other options it is not very important. Most trace options are specified in the configuration file. See the traceoptions command later in this appendix for more details. Signal Processing gated processes the following signals SIGHUP Tells gated to reread the configuration file. The new configuration replaces the one that gated is currently running. SIGHUP loads the new configuration file without interrupting gated service. SIGHUP is available for quick configuration changes. At most sites the routing configuration changes infrequently. The few times you need to change to a new configuration terminate gated and rerun it with the new configuration. This is a more accurate test of how things will run at the next boot. SIGINT Tells gated to snapshot its current state to the file usr tmp gated dump. SIGTERM Tells gated to shut down gracefully. All protocols are shut down following the rules of that protocol. For example EGP sends a CEASE message and waits for it to be confirmed. SIGTERM removes from the kernel routing table all routes learned via the exterior routing protocols. If you need to preserve those routes while gated is out of operation use SIGKILL. SIGKILL Tells gated to terminate immediately and dump core. Routes are not removed from the routing table and no graceful shutdown is attempted. SIGUSR1 Tells gated to toggle tracing. If no trace flags are set SIGUSR1 has no effect. But if tracing is enabled the first SIGUSR1 causes gated to toggle off tracing and to close the trace file. The next SIGUSR1 turns tracing back on and opens the trace file. When the trace file is closed it .
