Cisco Router 800 Series Software Configuration Guide
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1-19 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 1 Concepts VoIP The gatekeeper maintains a registry of devices in the multimedia network. The devices register with the gatekeeper at startup and request admission to a call from the gatekeeper. The gatekeeper is an H.323 entity on the LAN that provides address translation and control access to the LAN for H.323 terminals and gateways. The gatekeeper may provide other services to the H.323 terminals and gateways, such as...
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Chapter 1 Concepts QoS 1-20 Cisco 800 Series Software Configuration Guide 78-5372-06 QoS This section describes quality of service (QoS) parameters, including the following: IP Precedence PPP Fragmentation and Interleaving CBWFQ RSVP Low Latency Queuing QoS refers to the capability of a network to provide better service to selected network traffic over various technologies, including ATM, Ethernet and IEEE 802.1 networks, and IP-routed networks that may use any or all of these underlying...
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1-21 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 1 Concepts QoS Features such as policy-based routing and committed access rate (CAR) can be used to set precedence based on extended access-list classification. This allows considerable flexibility for precedence assignment, including assignment by application or user, or by destination and source subnet, and so on. Typically this functionality is deployed as close to the edge of the network (or administrative domain) as...
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Chapter 1 Concepts QoS 1-22 Cisco 800 Series Software Configuration Guide 78-5372-06 There are two levels of queuing: ATM queues and Cisco IOS queues. CBWFQ is applied to Cisco IOS queues. A first-in-first-out (FIFO) Cisco IOS queue is automatically created when a PVC is created. If you use CBWFQ to create classes and attach them to a PVC, a queue is created for each class. CBWFQ ensures that queues have sufficient bandwidth and that traffic gets predictable service. Low-volume traffic streams...
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1-23 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 1 Concepts QoS Committed Access Rate Committed access rate (CAR) can be used to limit bandwidth or transmission rates based on traffic sources and destinations and to specify policies for handling traffic that breaches the specified bandwidth allocations. CAR provides configurable actions, such as transmit, drop, set precedence, or set QoS group, when traffic conforms to or exceeds the rate limit. The CAR feature performs...
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Chapter 1 Concepts QoS 1-24 Cisco 800 Series Software Configuration Guide 78-5372-06 application or user, or by destination and source subnet, and so on. Typically this functionality is deployed as close to the edge of the network (or administrative domain) as possible, so that each subsequent network element can provide service based on the determined policy. IP Precedence can also be set in the host or network client with the signaling used optionally. IP precedence enables service classes...
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1-25 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 1 Concepts Access Lists ATM Traffic Policing The traffic policing feature performs the following functions: Limits the input or output transmission rate of a class of traffic, based on user-defined criteria Marks packets by setting the IP Precedence value, the QoS group, or the differentiated service code point (DSCP) value Access Lists With basic standard and static extended access lists, you can approximate session...
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Chapter 1 Concepts Access Lists 1-26 Cisco 800 Series Software Configuration Guide 78-5372-06
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CHAPTER 2-1 Cisco 800 Series Software Configuratio Guide 78-5372-06 2 Configuring Basic Networks This chapter describes three networks that network administrators in small independent offices or that telecommuters can set up. You can familiarize yourself with the three networks, determining which one is best suited for your situation. Following are the three basic network types: Private IP network to Internet Public IP network to Internet Remote office network to corporate office network using...
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Chapter 2 Configuring Basic Networks Before Configuring Basic Networks 2-2 Cisco 800 Series Software Configuratio Guide 78-5372-06 Step 2While ordering your ISDN line, gather the following information from your telephone service provider: ISDN switch type. Service profile identifiers (SPIDs). Only telephone service providers in North America assign SPIDs. SPIDs identify the ISDN B channels. The SPID format is generally an ISDN telephone number with additional numbers at the end; for example,...