Hi Ebben,

Thanks for your reply.
Please see inline with [Shunwan].

Regards,
Shunwan

-----邮件原件-----
发件人: Ebben Aries [mailto:[email protected]] 
发送时间: 2016年4月1日 6:26
收件人: Zhuangshunwan; [email protected]
主题: Re: [GROW] A question to draft-ietf-grow-bmp-17


On 03/31/2016 01:34 AM, Zhuangshunwan wrote:
> Hi all,
> 
> I have a minor question to draft-ietf-grow-bmp-17.
> 
> Please help me to understand correctly, thanks.
> 
>  
> 
> In draft-ietf-grow-bmp-17, Route Monitoring message was documented as
> follows:
> 
> 4.6.  Route Monitoring
> 
>  
> 
>    Route Monitoring messages are used for initial synchronization of
> 
>    ADJ-RIBs-In.  They are also used for ongoing monitoring of 
> ADJ-RIB-In
> 
>    state.  Route monitoring messages are state-compressed.  This is 
> all
> 
>    discussed in more detail in Section 5.
> 
>  
> 
>    Following the common BMP header and per-peer header is a BGP Update
> 
>    PDU.
> 
>   
> 
> My question:
> 
> How to understand "Following the common BMP header and per-peer header 
> is a BGP Update PDU." ?
> 
> Does it mean that "only" one BGP Update PDU can be encapsulated after 
> a per-peer header?
> 

Yes

> When multiple BGP Update PDUs share the same per-peer header, can it 
> support "1 per-peer header + multiple BGP Update PDUs" ?
> 

No - each UPDATE msg is encapsulated in a separate Route Monitoring msg.
 The text could probably be adjusted to spell this out better.
[Shunwan] I think this text is better.

Is your concern the overhead introduced by replicated common/per-peer headers 
should processing be common across multiple UPDATE msg (down to the timestamp)?
[Shunwan] Yes, this is what my concern. My colleagues noticed that multiple BGP 
Update Msgs share the same per-peer header (including the same timestamp ), so 
we think if we can put multiple BGP Update Msgs after a sharing per-peer 
header, so a separate Route Monitoring msg will carry more information.
>  
> 
>  
> 
> Thanks,
> 
> Shunwan
> 
> 
> 
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> https://www.ietf.org/mailman/listinfo/grow
> 
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