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Comment: Added pointer to "Redux" paper


Where temporary congestion cannot be avoided, some buffering in network nodes is required (in routers and other packet-forwarding devices such as Ethernet or MPLS switches) to queue incoming packets until they can be transmitted. The appropriate sizing of these buffers has been a subject of discussion for a long time.

Traditional wisdom recommends that a network node should be able to buffer an end-to-end round-trip time's worth of line-rate traffic, in order to be able to accomodate bursts of TCP traffic. This recommendation is often followed in "core" IP networks. For example, FPC (Flexible PIC Concentrators) on Juniper's M- and T-Series routers contain buffer memory for 200ms (M-series) or 100ms (T-series) at the supported interface bandwidth (cf. Juniper M-Series Datasheet and a posting from 8 May, 2005 by Hannes Gredler to the juniper-nsp mailing list.) These ideas also influenced RFC 3819, Advice for Internet Subnetwork Designers.


– Main.SimonLeinen - 2005-01-07 - 2019-0310-1114