Re: (no subject)

The per-hop behavior (PHB) doesn't exist in a vacuum.
The intro to rfc2598 tries to state that the PHB is 
only one building block to a particular behavior defined 
over a network domain. RFC 3086 tries to cover other 
kinds of considerations you need to take into account
when building any per-domain behavior (PDB). The DB
PHB defined in RFC3248 can be used quite nicely to
give a virtual wire PDB if that is the aim.

	Kathie 

hchang wrote:
> 
> hi,i have a question about the EF PHB.
> the EF service must obey the following condition :(rfc 2598)
> Conditioning the aggregate (via policing and shaping) so that its arrival rate at any node is always less
> than that node's configured minimum departure rate.
>         we use traffic conditioners at the edge nodes of the DiffServ domain to achieve this target.
> my question is that if a node has several upstream nodes,for example ,3 upstream nodes, but they are all not the edge nodes.according to the condition,the sum arrival rate from the  3 upstream nodes must less than the configured minimum departure rate,how can we achieve this in a dynamic network state?
> 
> 
> 
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