Re: [Idr] why has 4096 bytes limit on BGP messages size?

Fenggen Jia wrote:
> Then why not other limit,how is 4096 bytes derived, thanks.BTW,whether it's a good pratice in protocol devise to limit message sizes?

Do not know the precise reason for the number. I suspect that it's
chosen as it's large enough. It turns out to be a good number - it has
certainly withstood the test of time.

If there is ever a legitimate need to increase the limit in the future,
that can be done easily with the capability advertisement from the
protocol perspective.

-- Enke

> I see in ripV1 that the maximum PDU length is 576bytes its reason is to avoid IP fragmentation,but in ripng the PDU length is determined only by the link MTU,and in snmp i also doesn't see the message size limit. 
> Yours,Fenggen
>   
>> On Jun 13, 2007, at 10:01 PM, Fenggen Jia wrote:
>>
>>     
>>> hi,all,
>>>       I am wondering why BGP has 4096 bytes limit on all its  
>>> messages,should we leave it to the implementator to decide,thanks!
>>>       
>> Well, the problem with that is that a sender could then create an  
>> arbitrarily long message, which could be arbitrarily problematic for  
>> a receiver.
>>
>> Tony
>>
>>     
>
>
>
>
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