Windows Time Server


3.2.3 Peer Variables

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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

2. Peer Variables

 

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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