Protocols Apis

Administering Cisco QOS for IP Networks by Wayne Lawson

By Wayne Lawson

AVVID (Architecture for Voice, Video, and built-in Data), the most recent improvement from Cisco structures is redefining the best way companies converse. AVVID permits companies to transmit voice, info, and video over a unmarried built-in structure, while long ago 3 separate platforms have been required.Administering Cisco AVVID functions is a certified reference detailing the techniques, strategies, and strategies for using Cisco software program to configure and preserve Cisco networks and infrastructures. It comprises thorough discussions of serious issues akin to, Cisco CallManager model 3.0, Cisco Unified Open community alternate 4.1E (uOne), WebLine and GeoTel product software program, Cisco QoS coverage Manger 1.1 in addition to many different QoS gains, and Cisco IOS network-wide software program. permits IP specialist to get forward during this becoming box.

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In contrast, broadcasts are used to send packets from one server to all the users on a network, regardless of participation (one-to-all). 3 Multicasting Example Not participating Wide Area Network Participating Hosts participating in a multicast begin receiving the data stream as soon as they join the group, and they stop receiving the stream when they leave. In addition, clients or end-stations can join and leave dynamically with little or no impact on the multicast or the network. com 110_QoS_01 2/13/01 6:34 PM Page 9 Cisco IOS Feature Review • Chapter 1 Multicasting can be used to deliver audio and video in real time, which is gaining popularity in corporations as well as with vendors.

Although extended ACLs provide more extensive filtering, they are similar in operation to standard ACLs. The protocol keywords are EIGRP, GRE, ICMP, IGMP, IGRP, IP, IPINIP, NOS, OSPF,TCP, OR UDP. Protocol numbers in the range 0 to 255 can also be used. This is accomplished by specifying the port number or application name. 12 lists some common applications and their relative port numbers. The following syntax is used when implementing extended ACLs. 13 defines each portion of the extended Access Control List command.

Com 23 110_QoS_01 24 2/13/01 6:35 PM Page 24 Chapter 1 • Cisco IOS Feature Review A wildcard mask bit with the value of 0 indicates you need to check the corresponding address bit for a match. 0 is used. This mask requires the address to match each octet exactly. An access list entry is automatically appended to the end of the access list. This entry is known as an “Implicit Deny Any” entry. Network traffic not explicitly permitted in previously will be implicitly denied. 00000000 To configure a standard ACL, you would use the following syntax.

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