Tim,

On Wed, Jul 12, 2017 at 12:57:31AM +0000, Tim Evens (tievens) wrote:
> [TE] IMO, limitations around transmission of X number of peers with *-rib-* 
> monitoring should be BMP
>  sender implementation specific.  I do not believe anyone in their right mind 
> would configure a platform/sender
> for *-rib-* on all peers, but you never know. This is why limits should 
> exist, a line in the sand,
> for the platform.   Limits that apply to one platform are not necessarily 
> required to be applied to another.
> We want to enable the ability to monitor the five collection points of BGP 
> (Adj-RIB-In/pre, Adj-RIB-In/post,
> Adj-RIB-Out/pre, Adj-RIB-Out/post, and Loc-RIB) but this doesn't mean the 
> platform can't restrict combinations.

As I already noted, I'm perfectly fine with the existing rib-out encoding.
I simply believe that the per-group encoding offers flexibility to remove
noise from BMP feeds for some of the same use cases.

In particular, it avoids de-duping needs for operators in many scenarios.

I find this less a matter of limits and more a matter of simple BGP
procedure.  A single update learned on one feed will usually result in
multiple advertisements.  Even with peer-group grouping, the fan out is
often significantly higher.  Given this, a mechanism to reduce information,
where appropriate, seems reasonable.

-- Jeff

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