Little Clarification Needed with BGP section of ORD

1.


ORD Page 244 (Hard Copy)

Under Section Route Reflectors:


"As a side note, if Router B were to reflect the best path back to its clients, the clients would receive redundant information. The issue here is not the redundant information that the clients would receive but the processing that the route reflector requires. In other words, it is recommended to have a cluster with a full mesh of clients if clients are present in a significant number or if the physical topology dictates this to be so. The number of clients needed to consider using a full mesh between them depends heavily on the type of router being used as a route reflector and any other functions it might be performing. In other words, to determine the ideal point for your network, monitor the performance and utilization of the route reflectors at the times it needs to send updates to the clients. Your comfort level dictates when to mesh the clients, divide the load between reflectors, or simply dedicate a router just for the route reflector function."


Can someone help with more explanation on this section.


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2.

Also in the end of BGP chapter author describes the Route Dampening in a case study but there is nothing described from Design standpoint. I remember reading some where in past about Route Dampening doing more bad than good (Perhaps some Nanog presentation).


Whats your opinion on that ?


Do you guys use BGP route dampening in real world deployments ?


if So, you prefer default values or fine tune those to something else ? 


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3.


How many chances are there to become transit AS in todays world ? where most upstream SPs put tight route filter on inbound and outbound updates


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4. Although " ORF " seems to be a nice feature, How often you guys have seen or implemented it in ref to Point 3 ?
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