3Com 6000 About AARP

6-10 CHAPTER 6: ROUTING WITH APPLETALK

The AppleTalk Data Stream Protocol (ADSP). The ADSP works with the

ATP to ensure reliable data transmission. Unlike ATP, however, ADSP provides

full-duplex byte-stream delivery. This means that two nodes can

communicate simultaneously. ASDP also includes ﬂow control, so that a

fast sender does not overwhelm a slow receiver.

The AppleTalk Session Protocol (ASP). The ASP passes commands

between a workstation and a server once a connection is made between

the two. ASP ensures that the commands are delivered in the same order as

they were sent, and returns the results of these commands to the

workstation.

The Printer Access Protocol (PAP). The PAP maintains communications

between a workstation and a printer, or print service. The PAP functions

include setting up and maintaining a connection, transferring the data, and

tearing down the connection on completion of the job. Like other protocols

at the session layer, PAP relies on NBP to ﬁnd the addresses of named

entities. PAP also depends on ATP for sending data.

The Presentation

Layer

The presentation layer maintains information about ﬁles, formats, and

translations between formats. Two protocols are present at the

presentation layer: the AppleTalk Filing Protocol (AFP) and PostScript. AFP

provides remote access to ﬁles on the network. PostScript is a paged

description language used by many printers.

About AARP The AppleTalk Address Resolution Protocol (AARP) maps the hardware

address of an AppleTalk node to an AppleTalk protocol address. It does this

for both extended and nonextended networks.

When a node on the network initializes, it randomly selects an AppleTalk

address for itself. At the same time, it sends out 10 AARP probe packets. The

probe packets determine whether any other nodes on the network are

using the address it has chosen. If a node on the network is already using

that address, the node randomly selects another address and sends out

another probe packet.

The AARP maintains an Address Mapping Table (AMT) with the most

recently used hardware addresses and their corresponding AARP addresses.

Contents

Main 3Com Corporation 95052-8154 Santa Clara, California 5400 Bayfront Plaza C ONTENTS S IG P R II A III A R P DMINISTERING A OUTING IPX R 9 IV A Page A BOUT Introduction T UIDE Conventions Table 1 and Table 2 list conventions that are used throughout this guide. LANplex 6000 Documentation Documentation Comments Page Page 1 F About LANplex Extended Switching 1-2 CHAPTER 1: LANPLEX EXTENDED SWITCHING FEATURES Using Menus to Perform Tasks Option Descriptions Options (These vary per level of access.) Using Menus to Perform Tasks 1-3 Figure 1-1 IP Menu Hierarchy 1-4 CHAPTER 1: LANPLEX EXTENDED SWITCHING FEATURES Figure 1-2 IPX Menu Hierarchy Page Page 2 SWITCHING SOFTWARE About Installing Software Copying Software to a Hard Disk Page Page Loading Software Page Page Page Page 3 S What is Routing? Page Page Bridging/Routing Models Page Page Page Page 4 IP Routing and the OSI Model The Elements of Page Page Page Page Page Page IP Routing Transmission Errors IP Routing References IPX Routing in the NetWare Environment ROUTING WITH IPX Page Page How IPX Routing Works Page Page Page The Elements of IPX Routing Page Page Page Page Page Page Page Page About AppleTalk AppleTalk Network Elements ROUTING WITH APPLETALK Page Page AppleTalk Protocols Page Page Page Page Page About AARP Page Page Page Page 7 Page Page Page Page Page Page 7-8 CHAPTER 7: ADMINISTERING IP ROUTING Removing a Route To remove a route: ip route remove ip route flush ip route default Administering the ARP Cache Page Administering UDP Helper Page Enabling/ Disabling IP Setting the RIP Pinging an IP Station Displaying IP The IP statistics you can view are described in Table 7-2. To display IP statistics: 8 Page Page Page Page Page Administering Routes 8-7 6Enter the node address of the route. A static route is dened in the following example: Removing a Route To remove a route: ipx route remove ipx route flush Administering Servers Page 8-10 CHAPTER 8: ADMINISTERING IPX ROUTING Removing a Server To remove a server: ipx server remove ipx server flush Setting IPX Setting the RIP Setting the Enhanced RIP Setting the SAP Displaying Displaying Statistics 8-15 Displaying IPX RIP Statistics To display IPX RIP statistics: The IPX RIP statistics you can view are described in Table 8-2. ipx statistics rip Statistics appear as in the example below: Displaying IPX SAP Statistics To display IPX SAP statistics The IPX SAP statistics you can view are described in Table 8-3. ipx statistics sap Statistics are displayed, as shown in the example below: Page Page 9 R Page Page Page Page Administering the AARP Cache Administering the AARP Cache 9-7 Displaying the AARP Cache appletalk aarp display Displaying the Zone Table Displaying the Zone Table 9-9 appletalk zone display network Zone Table by Network Numbers Zone Table by Zones OR appletalk zone display zone Conguring Conguring Checksum Pinging an AppleTalk Node Viewing Appletalk The AppleTalk DDP statistics you can view are described in Table 9-1: Displaying RTMP To display RTMP statistics: The RTMP statistics you can view are described in Table 9-2: Displaying ZIP To display ZIP statistics: The ZIP statistics you can view are described in Table 9-3: 9-16 CHAPTER 9: ADMINISTERING APPLETALK ROUTING Displaying NBP appletalk statistics nbp Table 9-3 ZIP Statistics (continued) Page Page Page Page A On-line Technical Services Page Support from Your Network Supplier Support from 3Com Returning Products for Repair I Numerics A B C D E F G H L M N O P R S T U Z