isis协议第一个Hello包

Breakpoint 1, isis_send_pdu_bcast (circuit=0x7ffff42808c8, level=1) at isis_pfpacket.c:319
319      int written = 1;
(gdb) bt
#0  isis_send_pdu_bcast (circuit=0x7ffff42808c8, level=1) at isis_pfpacket.c:319
#1  0x00007ffff42d2d57 in send_hello (circuit=0x7ffff42808c8, level=1) at isis_pdu.c:2034
#2  0x00007ffff42d2e3a in send_lan_hello (circuit=0x7ffff42808c8, level=1) at isis_pdu.c:2063
#3  0x00007ffff42d2f13 in send_lan_l1_hello (thread=0x7ffff4587cc0) at isis_pdu.c:2091
#4  0x00007ffff42f64ef in thread_call (thread=0x7ffff4587cc0) at thread.c:1177
#5  0x00007ffff42c1a3d in main (argc=5, argv=0x66c4a0, envp=0x6520f0) at isis_main.c:353
#6  0x00007ffff7a06eff in ns3::DceManager::DoStartProcess (context=0x673550) at ../model/dce-manager.cc:283
#7  0x00007ffff7a8fd34 in ns3::TaskManager::Trampoline (context=0x663180) at ../model/task-manager.cc:274
#8  0x00007ffff7a8bd0f in ns3::PthreadFiberManager::Run (arg=0x673840) at ../model/pthread-fiber-manager.cc:402
#9  0x000000318b2079d1 in start_thread () from /lib64/libpthread.so.0
#10 0x000000318a6e88fd in clone () from /lib64/libc.so.6
(gdb)