Subject: RE: [VRRP] VRRP RFC

From: Thomas Dalton <[email-masked]>
Date: Mon, 4 Nov 2002 14:32:11 -0000

<snip>
In the last if statement, in case Preempt_Mode is TRUE 
and the Priority in the ADVERTISEMENT is smaller than 
the local Priority, then:  
Why do we Discard the ADVERTISEMENT ?
Why not transition to MASTER and preempt the lower priority Master? 
</snip>

We discard the advertisement as a way of preempting, the key thing here is
that we do not reset the Master_Down_Timer. By ignoring the advertisement
the Master_Down_Timer will fire and we will transition to MASTER.

Cheers,
Tom.

-----Original Message-----
From: Lior Ronen [mailto:[email-masked]]
Sent: Monday, November 04, 2002 2:24 PM
To: Vrrp (E-mail)
Subject: [VRRP] VRRP RFC

Hello,

Please help me understand the following issue:

In the VRRP RFC there is the following algorithm for backup state: 
    - If an ADVERTISEMENT is received, then: 
         If the Priority in the ADVERTISEMENT is Zero, then: 
          o Set the Master_Down_Timer to Skew_Time 
         else: 
            If Preempt_Mode is False, or If the Priority in the
            ADVERTISEMENT is greater than or equal to the local
            Priority, then: 
             o Reset the Master_Down_Timer to Master_Down_Interval 
            else: 
             o Discard the ADVERTISEMENT 
            endif
         endif
      endif
In the last if statement, in case Preempt_Mode is TRUE 
and the Priority in the ADVERTISEMENT is smaller than 
the local Priority, then:  
Why do we Discard the ADVERTISEMENT ?
Why not transition to MASTER and preempt the lower priority Master? 

Thank you for your time,
Lior
______________________________________
Lior Ronen
RADLAN Computer Communications Ltd.
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BLDG #4, 
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