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Re: [openss7] SCCP Hop Counter
Korpi,
The purpose of the SS7 Hop Counter is to ensure that a message is not
excessively delayed in arriving a the destination. This could be too
many GT Translations, too many relay points, loops in GTT between relay
points, etc. In practice, aside from testing, it is useful only for
detecting loops.
--brian
Korpi Juha wrote: Wed, 31 Oct 2001 10:02:16
> > Greetings !!
> >
> > I have a question in relation to the SCCP Hop Counter parameter. When the
> > routing is based on GT and the message is a XUDT, the hop counter is
> > decreased by one in the node(T1.112 and White Book).
> >
> > Do you know where and when the initail value is set ?What is the initial
> > value ? Is the meaning following:
> > 1.Originating node is sending some XUDT messages and routing based on GT
> > 2.GT translation is done->(DPC_a,GT), Hop counter is decreased by one ( 3
> > -> 2) , message is sent to the DPC_a
> > 3.DPC_a receives the message, the routing is based on GT -> translation->
> > result is DPC_b+SSN ->Hop counter is decreased by one ( 2 -> 1)-> message
> > is sent to DPC_b
> > 4.DPC_b receives the message and DPC_b is this node
> >
> Is the purpose of the SCCP Hop Counter to "check that all GT tables are OK"
> and there will not be some unfocused messages in the network ?
>
> > Br Juha Korpi
> >
> > --------------------------------------------------------------------------
> > ----
> > ICL Invia Oy, Finland, Juha Korpi
> > http://www.iclinvia.fi
> > Homo Homini Lupus
> > --------------------------------------------------------------------------
> > ----
> >
> >
--
Brian F. G. Bidulock ¦ The reasonable man adapts himself to the ¦
bidulock@openss7.org ¦ world; the unreasonable one persists in ¦
http://www.openss7.org/ ¦ trying to adapt the world to himself. ¦
¦ Therefore all progress depends on the ¦
¦ unreasonable man. -- George Bernard Shaw ¦