From: Nick Shah (nshah@connect.com.au)
Date: Thu Sep 05 2002 - 02:29:45 GMT-3
Roger
'keepalives' are used like heartbeats, u miss a few and the peer is declared
down. (Do not confuse this with LOCAL ACK). So the reason we keep them 0 is
so they dont kick/ dial the ISDN link. Now that keepalive is 0, no
keepalives are sent and so the keepalive traffic doesnt keep the link up.
In absence of keepalives, you need a mechanism for TCP to determine when the
SNA session has died. TCP relies on acknowledgements in this case after it
sends data. However by default it may wait upto 15 mins. (default
acknowledgement interval) So we specify 'timeout' to be a lower value (than
15mins) to detect for failures/session death. This value should be long
enough to allow acks during congestion.
'Inactivity timer' is the number of minutes after which the peer should
disconnect if there is NO ACTIVITY ON ANY OF THE CIRCUITS.
So, if there is activity, then all is fine and good. In absence of activity,
the session will die at the end of INACTIVITY TIMER. In case of failure of
the 'link', the session will be declared 'dead' at the end of TIMEOUT VALUE.
hth
Nick
----- Original Message -----
From: "Roger Schotsal" <schotsal@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, September 05, 2002 2:44 PM
Subject: Fwd: DLSW Dynamic Peers
> >I have been looking at dynamic peers & the related timout values.
> >
> >ex.
> >dlsw remote-peer 0 tcp 1.1.1.1 keepalive 0 timeout 90 dynamic inactivity
5
> >
> >'keepalive 0' - I understand this is to stop the keepalive from
> >perpetuating the connection. This is auto inserted by the 'dynamic'
> >keyword.
> >
> >'timeout 90' - This is also auto inserted by the dynamic keyword.
> >
> >'inactivity 5' - This is manually added.
> >
> >What I don't understand is the relationship between inactivity & timeout.
> >inactivity keeps the connection open for 5 minuets after no activity -
the
> >timeout closes the connection if no traffic is detected for 90 seconds.
> >It seems that these two command options are in competition. That is the
> >'timeout 90' will close the connection before the 'inactivity 5' can ever
> >take effect.
> >
> >
> >Is there something I am missing? a command precedence etc. that I am
> >missing?
> >
> >Thanx,
> >Roger
>
>
>
>
>
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