Re: Re: many thanks for ur reply there few more

On Thu, 28 Jun 2007, Brian F. G. Bidulock wrote:

> messages).  SIGTRAN uses IP which has an minimum MTU of 536 (no, its larger,
> someone help me here) but is normally larger.  The point is there is never

The minimum MTU for IPv4 is 576 octets.  For IPv6 is has been increased to
1280 octets.

Usually an MTU of 1500 is used, which is the maximum ethernet payload
length (although there is a trend towards larger, so called "jumbograms"
on gigabit and 10 gigabit ethernet) although connections that are
tunnelled over another protocol will often have a lower MTU.

> any reason for SIGTRAN to break an SS7 message into multiple chunks, so you
> can assume one DATA Chunk header overhead per SS7 message.

It should be noted that this is not strictly true for all SIGTRAN
protocols - SUA, for example, can carry messages much longer than a single
SS7 message.  (I realise this conversation was primarilly about M3UA/M2PA,
but your statement was a little ambiguous so I am just clarifying it)

-- 
 - Steve Hill
   Software Engineer

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