Login
[x]
Log in using an account from:
Fedora Account System
Red Hat Associate
Red Hat Customer
Or login using a Red Hat Bugzilla account
Forgot Password
Login:
Hide Forgot
Create an Account
Red Hat Bugzilla – Attachment 301339 Details for
Bug 229217
enhancing ntp support
[?]
New
Simple Search
Advanced Search
My Links
Browse
Requests
Reports
Current State
Search
Tabular reports
Graphical reports
Duplicates
Other Reports
User Changes
Plotly Reports
Bug Status
Bug Severity
Non-Defaults
|
Product Dashboard
Help
Page Help!
Bug Writing Guidelines
What's new
Browser Support Policy
5.0.4.rh83 Release notes
FAQ
Guides index
User guide
Web Services
Contact
Legal
This site requires JavaScript to be enabled to function correctly, please enable it.
ntp.conf using tos orphan and tos minsane statements.
ntp.conf-standard (text/plain), 3.59 KB, created by
archimerged Ark submedes
on 2008-04-04 20:50:56 UTC
(
hide
)
Description:
ntp.conf using tos orphan and tos minsane statements.
Filename:
MIME Type:
Creator:
archimerged Ark submedes
Created:
2008-04-04 20:50:56 UTC
Size:
3.59 KB
patch
obsolete
># For more information about this file, see the man pages ntp.conf(5), ># ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5). For ># more complete information, see /usr/share/doc/ntp*/index.html. > >driftfile /var/lib/ntp/drift > ># Permit time synchronization with our time source, but do not ># permit the source to query or modify the service on this system. >restrict default kod nomodify notrap nopeer noquery > ># Permit all access over the loopback interface. This could ># be tightened as well, but to do so would affect some of ># the administrative functions. >restrict 127.0.0.1 > ># Hosts on local network are less restricted. >restrict 192.168.197.0 mask 255.255.255.0 nomodify notrap > ># From /usr/share/doc/ntp-4.2.4p4/manyopt.html: ># Sometimes it is necessary to operate an NTP subnet in isolation, ># because a local reference clock is unavailable or connectivity to ># the Internet is not provided. In such cases it may be necessary that ># the subnet servers and clients remain synchronized to a common ># timescale, not necessarily the UTC timescale. Previously, this ># function was provided by the local clock driver, which could be ># configured for a server that could be reached, directly or ># indirectly from all other servers and clients in the subnet. > ># There are many disadvantages using the local clock driver: multiple ># source redundancy is not possible and the subnet is vulnerable to ># single-point failures. Orphan mode is intended to replace the need ># for the local clock driver. It operates in subnet configurations in ># all modes, including broadcast, and multiple servers and clients and ># handles seamless switching as primary sources fail and recover. > ># A server or client is enabled for orphan mode using the [ 'tos' ># 'orphan' stratum ] command, where stratum is some stratum less than ># 16 and greater than any anticipated stratum that might occur with ># ordinary Internet servers. This is the same consideration that ># guides the local clock driver stratum. > ># As long as the stratum of any orphan is less than the orphan ># stratum, the servers and clients operate in the normal way. However, ># if the stratum equals or exceeds this stratum, the server or client ># is considered an orphan. If under these conditions a host has no ># sources of the same or lower stratum, it is designated an orphan ># parent; otherwise, it is considered an orphan child. Orphan parents ># show offset zero, root delay zero and reference ID 127.0.0.1, which ># of course is the Unix loopback address. Orphan children show the ># mitigated offset of their servers, root delay randomized over a ># moderate range and reference ID of their system peer. An important ># distinction is that the entire subnet operates at the same orphan ># stratum and that the order of preference is the root delay, not the ># stratum and root distance as usual. > ># For the most flexible and reliable operation, all servers and ># clients in the subnet should include the 'orphan' command in ># the configuration file and with the same orphan stratum. This ># provides mutual redundancy and diversity for all NTP modes of ># operation, including broadcast. >tos orphan 5 > ># [ 'tos' 'minsane' number ] specifies the minimum number of ># candidates available to the clock selection algorithm in order to ># produce one or more truechimers for the clustering algorithm. If ># fewer than this number are available, the clock is undisciplined and ># allowed to run free. The default is 1 for legacy purposes. However, ># according to principles of Byzantine agreement, minsane should be at ># least 4 in order to detect and discard a single falseticker. >tos minsane 4 > >includefile /etc/ntp/ntpservers
You cannot view the attachment while viewing its details because your browser does not support IFRAMEs.
View the attachment on a separate page
.
View Attachment As Raw
Actions:
View
Attachments on
bug 229217
:
296601
| 301339 |
301340
|
301342
|
301344