... SoftwarecompressionConfederations, 41 3 41 4configuration, 43 6 43 9defining, 41 1 41 4usage, 41 7timing, 43 8 43 9Confirmation messages, 159Congestion avoidance, 307, 47 3advantages/disadvantages, 142 – 143 configuration, ... 376, 42 3BGP, redistribution, 40 8 41 1Interior Gateway Routing Protocol(IGRP), 10, 13–16, 21, 26, 50– 54. Seealso Enhanced IGRPInternal BGP (IBGP), 41 2 41 4, 42 3defining, 41 1 41 4neighbors, 44 0configuration, ... 12.1!hostname LSR-D! ip subnet-zero ip cefwww.syngress.com110 _QoS_ 12 2/13/01 2 :44 PM Page 49 1 47 4 Chapter 12 • Multiprotocol Label Switching (MPLS)provider edge routers use BGP 4 to communicate...