routing between, using multilayer switches, 197 specifying on a trunk in CatOS, 41 Variable Length Subnet Masks (see VLSM) specifying on a trunk in IOS, 39 VCs (virtual circuits), 299 tagging in 802.10 frames, 36 assigning to subinterfaces, 315 tagging in ISL frames, 35 burst rate, 303 Voice VLAN, 244-246 determining if active on the router, 318 Index VLSM (Variable Length Subnet vtp domain command (IOS), 49 Masking), 487-489 vtp mode command (CatOS), 50 VLSM (Variable Length Subnet Masks), 98, vtp password command (IOS), 51 vtp pruning command (IOS), 52 voice control bandwidth requirements in QoS scheme, 434 converged network policy map, 448 WAN interface cards (WICs) with integrated CSU/DSUs, 257, 282 QoS priority, 432 WANs (Wide Area Networks), 3 voice stream, VoIP, 419 defined, 5 Voice VLAN, 244-246 VoIP (Voice over IP), 419 web page for this book, XV per-packet load balancing and, 193 WFQ (weighted fair queuing), 421, 426 two-building VoIP network congested network problem and, 443, (example), 421 VPN concentrators, 150 WICs (WAN interface cards) with integrated firewalls and, 363 CSU/DSUs, 257, 282 Wide Area Networks (see WANs) VPNs (virtual private networks), 150 PPTP protocol for access, GRE and, 162 wildcard masks, 118, 323 wireless networks, 3 running GRE tunnel through VPN, 160 VRRP (Virtual Router Redundancy write memory command, 388 Protocol), 163 write standby command, 389 vserver server-name command, 403 vservers, 403 VTP (VLAN Trunking Protocol), 28, 43-54 X.25 networks, 125 configuration revisions, 45 xlates (PIX firewall translations), 391 configuring, 49-54 domains, 49 password, 51 VTP mode, 50 yellow alarm (RAI), 278 VTP pruning, 51-54 corporate network design, 477 dangers of, 47 zero burst, frame relay virtual circuit, 303 domain name, 37 domains, 44 pruning, 46 server, client, and VTP transparent modes, 45 Index About the Author Gary A. Donahue (GAD) is a working consultant who has been in the computer industry for 25 years as a programmer, mainframe administrator, technical assis- tance cen