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

hi,all,
	I think my inital question is why the protocol has 4K limit on messages sizes,that is different from the implementation,an implementation may chose to use large read or write buffer(>4K) to handle multiple updates one time,still my question is if message size limit is a good pratice in protocol design?
Yours,Fenggen

>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?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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　　　　　　　　致
礼！
 
				 
　　　　　　　　Fenggen Jia
　　　　　　　　fgjia@mail.zjgsu.edu.cn  
　　　　　　　　　　2007-06-18