SSF.OS.BGP4.Timing
Class IdealMRAITimer

java.lang.Object
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  +--com.renesys.raceway.SSF.Entity
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        +--SSF.OS.Timer
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              +--SSF.OS.BGP4.Timing.Timer
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                    +--SSF.OS.BGP4.Timing.IdealMRAITimer

public class IdealMRAITimer

extends Timer

BGP's Minimum Route Advertisement Interval Timer when applied on a per-peer, per-destination basis. This is considered ideal since no route advertisement information ever waits longer than the Minimum Route Advertisement Interval before being sent. The ideal Minimum Route Advertisement Interval Timer has its own implementation (instead of using the more generic EventTimer class) because is needs to keep a little extra information, namely the destination. When per-peer-only MRAI Timers are being used, the standard EventTimer class suffices. The purpose of the timer is to help ensure that peers do not receive update messages with routes regarding the same destination too frequently.

Field Summary

IPaddress	nlri The NLRI from the update message which caused this timer to start.
PeerEntry	peer The entry of the peer to whom a message was sent.

Fields inherited from class SSF.OS.BGP4.Timing.Timer

CONNRETRY, HOLD, is_expired, KEEPALIVE, MASO, MRAI

Constructor Summary

IdealMRAITimer(BGPSession b, long dt, IPaddress ipa, PeerEntry pe)
Constructs a Minimum Route Advertisement Interval Timer with the given parameters.

Method Summary

void

callback() When the timer expires, this method removes the IP address from the list of recently sent updates, sends an update with the advertisement (or possibly withdrawal, if the option to apply MRAI to withdrawals is in use) that was waiting to be sent (if there is one), and restarts a new timer (if a waiting advertisement (or withdrawal) was in fact sent).

Methods inherited from class SSF.OS.BGP4.Timing.Timer

canc, is_expired, set_at, set_expiry, when_set

Methods inherited from class SSF.OS.Timer

cancel, isCancelled, set, set

Methods inherited from class com.renesys.raceway.SSF.Entity

alignment, alignTo, coalignedEntities, inChannels, init, joinAll, makeIndependent, now, outChannels, pauseAll, playRole, processes, resetSimulation, resumeAll, startAll, startAll, startClient, startClient, startServer, Vx, Yx

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

nlri

public IPaddress nlri

The NLRI from the update message which caused this timer to start.

peer

public PeerEntry peer

The entry of the peer to whom a message was sent.

Constructor Detail

IdealMRAITimer

public IdealMRAITimer(BGPSession b,
                      long dt,
                      IPaddress ipa,
                      PeerEntry pe)

Constructs a Minimum Route Advertisement Interval Timer with the given parameters.

Parameters:

b - The BGPSession with which this timer is associated.

dt - The length of time (in ticks) that this timer is set for.

ipa - The NLRI from the update message which resulted in the need for this timer to be set.

pe - The peer to whom this timer applies.

Method Detail

callback

public void callback()

When the timer expires, this method removes the IP address from the list of recently sent updates, sends an update with the advertisement (or possibly withdrawal, if the option to apply MRAI to withdrawals is in use) that was waiting to be sent (if there is one), and restarts a new timer (if a waiting advertisement (or withdrawal) was in fact sent).

Specified by:

callback in class Timer