
Chapter 6. Enterprise Extender 89
• Rate fairness is limited if some connections have very large burst
sizes.
• Insufficient clock resolution for high speed links (T3 and above).
• Over-reaction to data loss.
Responsive Mode ARB (ARB2) Responsive Mode ARB provides better
performance and stability in networks with variable characteristics.
Responsive Mode ARB is designed to work nearly as well as Base
ARB in environments for which Base ARB was designed, and to work
better than Base ARB in environments such as the multiprotocol
network, which is currently the most significant environment for HPR
and in which different types of traffic using different f