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

Hi Steve,

just a quick note: The minimum MTU for IPv4 is 68 bytes (Up
to 60 bytes for the IP header, 8 bytes for the payload). 576
is the minimal size of the reassembly buffer.

Best regards
Michael

On Jun 28, 2007, at 10:28 AM, Steve Hill wrote:

> 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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