|
Peer
Variables
|
Name
|
Procedure
|
Configured
Bit
|
peer.config
|
initialization
|
Peer
Address
|
peer.peeraddress
|
receive
|
Peer
Port
|
peer.peerport
|
receive
|
Host
Address
|
peer.hostaddress
|
receive
|
Host
Port
|
peer.hostport
|
receive
|
Leap
Indicator
|
peer.leap
|
packet
|
Mode
|
peer.mode
|
packet
|
Stratum
|
peer.stratum
|
packet
|
Peer Poll
Interval
|
peer.peerpoll
|
packet
|
Host Poll
Interval
|
peer.hostpoll
|
poll
update
|
Precision
|
peer.precision
|
packet
|
Root
Delay
|
peer.rootdelay
|
packet
|
Root
Dispersion
|
peer.rootdispersion
|
packet
|
Reference Clock
Ident
|
peer.refid
|
packet
|
Reference
Timestamp
|
peer.reftime
|
packet
|
Originate
Timestamp
|
peer.org
|
packet,
clear
|
Receive
Timestamp
|
peer.rec
|
packet,
clear
|
Transmit
Timestamp
|
peer.xmt
|
transmit,
clear
|
Update
Timestamp
|
peer.update
|
filter,
clear
|
Reachability
Register
|
peer.reach
|
packet,
transmit,clear
|
Peer
Timer
|
peer.timer
|
receive,
transmit,poll update
|
Filter
Register
|
peer.filter
|
filter
|
Valid Data
Counter
|
peer.valid
|
transmit
|
Delay
|
peer.delay
|
filter
|
Offset
|
peer.offset
|
filter
|
Dispersion
|
peer.dispersion
|
filter
|
Authentic Enable
Bit
|
peer.authenable
|
authentication
|
Authenticated
Bit
|
peer.authentic
|
authentication
|
Host Key
Identifier
|
peer.hostkeyid
|
authentication
|
Peer Key
Identifier
|
peer.peerkeyid
|
authentication
|
|
Table 2 shows the complete set of peer variables. In addition to the common variables described previously, the following variables
are used by the peer management and measurement functions.
Configured Bit (peer.config): This is a bit indicating that the association was created from configuration information and should not
be demobilized if the peer becomes unreachable.
Update Timestamp (peer.update): This is the local time, in timestamp format, when the most recent NTP message was received. It is used
in calculating the skew dispersion.
Reachability Register (peer.reach): This is a shift register of NTP.WINDOW bits used to determine the reachability status of the peer,
with bits entering from the least significant (rightmost) end. A peer is
considered reachable if at least one bit in this register is set to one.
Peer Timer (peer.timer): This is an integer counter used to control the interval between transmitted NTP messages. Once set to a
nonzero value, the counter decrements at one-second intervals until reaching zero, at which time the transmit procedure is called.
Note that the operation of this timer is independent of local-clock updates, which implies that the timekeeping system and
interval-timer system architecture must be independent of each other.
|
|