>From RFC 1305. 0 - unspecified 1 - symmetric active 2 - symmetric passive 3 - client 4 - server 5 - broadcast 6 - reserved for NTP control message 7 - reserved for private use
Symmetric Active (1): A host operating in this mode sends periodic messages regardless of the reachability state or stratum of its peer. By operating in this mode the host announces its willingness to synchronize and be synchronized by the peer. Symmetric Passive (2): This type of association is ordinarily created upon arrival of a message from a peer operating in the symmetric active mode and persists only as long as the peer is reachable and operating at a stratum level less than or equal to the host; otherwise, the association is dissolved. However, the association will always persist until at least one message has been sent in reply. By operating in this mode the host announces its willingness to synchronize and be synchronized by the peer. --- John Tafasi wrote: > the debug ntp packets command shows packets sent and > received with different > modes. What are these modes? can some one explain? > > R5-2503# > Mar 6 02:42:08.879: NTP: rcv packet from 10.10.10.1 > to 10.10.10.2 on BRI0: > Mar 6 02:42:08.883: leap 0, mode 2, version 3, > stratum 8, ppoll 64 > Mar 6 02:42:08.887: rtdel 0000 (0.000), rtdsp 0009 > (0.137), refid 7F7F0701 > (12 > 7.127.7.1) > Mar 6 02:42:08.891: ref AF428DF1.DDC96254 > (02:41:53.866 UTC Sat Mar 6 > 1993) > Mar 6 02:42:08.891: org AF428DCF.F7F245A8 > (02:41:19.968 UTC Sat Mar 6 > 1993) > Mar 6 02:42:08.895: rec AF428DCF.FC06E685 > (02:41:19.984 UTC Sat Mar 6 > 1993) > Mar 6 02:42:08.899: xmt AF428E00.DDC524C4 > (02:42:08.866 UTC Sat Mar 6 > 1993) > Mar 6 02:42:08.903: inp AF428E00.E1C1EE1B > (02:42:08.881 UTC Sat Mar 6 > 1993) > R5-2503# > Mar 6 02:42:23.966: NTP: xmit packet to 10.10.10.1: > Mar 6 02:42:23.970: leap 0, mode 1, version 3, > stratum 8, ppoll 1024 > Mar 6 02:42:23.970: rtdel 0000 (0.000), rtdsp 000B > (0.168), refid 7F7F0701 > (12 > 7.127.7.1) > Mar 6 02:42:23.974: ref AF428DEF.F7D4D2C0 > (02:41:51.968 UTC Sat Mar 6 > 1993) > Mar 6 02:42:23.978: org AF428E00.DDC524C4 > (02:42:08.866 UTC Sat Mar 6 > 1993) > Mar 6 02:42:23.982: rec AF428E00.E1C1EE1B > (02:42:08.881 UTC Sat Mar 6 > 1993) > Mar 6 02:42:23.986: xmt AF428E0F.F7B05F8D > (02:42:23.967 UTC Sat Mar 6 > 1993) > R5-2503# __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=58360&t=58359 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
