|
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.
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