Avaya Configuring LLC Services User Manual

Part No. 117357-A Rev. ASeptember 1997BayRS Version 12.00Site Manager Software Version 6.00 Configuring LLC Services

117357-A Rev. A xi Tables Table 1-1. LLC Command PDUs ...1-9Table 1-2. PD

117357-A Rev. A xiii About This Guide If you are responsible for customizing your Bay Networks ® routers for Logical Link Control (LLC) services, y

Configuring LLC Servicesxiv 117357-A Rev. A Conventions angle brackets (< >) Indicate that you choose the text to enter based on the descriptio

About This Guide 117357-A Rev. A xv Acronyms ANSI American National Standards InstituteAPPN Advanced Peer-to-Peer NetworkingDLCI data link connectio

Configuring LLC Servicesxvi 117357-A Rev. A Ordering Bay Networks Publications To purchase additional copies of this document or other Bay Networks p

About This Guide 117357-A Rev. A xvii How to Get Help If you purchased a service contract for your Bay Networks product from a distributor or author

117357-A Rev. A 1-1 Chapter 1Logical Link Control Overview LLC is a standard protocol within the CCITT 8802.2 and IEEE 802. x family of LAN standar

ii 117357-A Rev. A 4401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821 Copyright © 1997 Bay Networks, Inc. All right

Configuring LLC Services1-2 117357-A Rev. A Using LLC2 with SNA and NetBIOS SNA needs a connection-oriented datalink layer for end-to-end packet sequ

Logical Link Control Overview 117357-A Rev. A 1-3 • WAN interfaces-- Frame Relay Boundary Network Node (BNN) and Boundary Access Node (BAN) interfac

Configuring LLC Services1-4 117357-A Rev. A • DLCI• Remote (or Destination) MAC• Local (or Source) MACEach entry requires that you specify the Remote

Logical Link Control Overview 117357-A Rev. A 1-5 Figure 1-1. Sample Frame Relay Network Bay Networks routerBay Networks routerHostClientSingle-swi

Configuring LLC Services1-6 117357-A Rev. A LLC 8802/802.2 Standards The LLC protocols comply with the CCITT 8802.2 standard, and operate within the

Logical Link Control Overview 117357-A Rev. A 1-7 • Connection-Oriented (Class 2 or LLC2)• Connectionless Acknowledged (Class 3 or LLC3)LLC1 (Connect

Configuring LLC Services1-8 117357-A Rev. A• Responds to a request from a higher-level protocol to close an established connection• Notifies a higher-l

Logical Link Control Overview117357-A Rev. A 1-9 • The source and destination LLCs control traffic by means of a numbering scheme for the sequential tr

Configuring LLC Services1-10 117357-A Rev. ALLC Protocol Data Unit FormatsThe LLC protocol data unit (PDU) contains fields for addressing, control, and

Logical Link Control Overview117357-A Rev. A 1-11 Figure 1-4. DSAP Address Field• A value of 0 for the Address Designation bit indicates that the PDU

117357-A Rev. A iii Bay Networks, Inc. Software License Agreement NOTICE: Please carefully read this license agreement before copying or using the

Configuring LLC Services1-12 117357-A Rev. A• A value of 0 for the Command/Response Identifier bit indicates that the PDU is a Command PDU.• A value of

Logical Link Control Overview117357-A Rev. A 1-13 SAP addresses can be• Individual -- Designates a single SAP. The individual address is usable as bot

Configuring LLC Services1-14 117357-A Rev. AFigure 1-7. LLC PDU Control Field FormatControl Field FormatsTable 1-2 further defines the purpose of the t

Logical Link Control Overview117357-A Rev. A 1-15 Table 1-3 further defines the purpose of parameter bits in the PDU Control field.Table 1-2. PDU Format

Configuring LLC Services1-16 117357-A Rev. ATable 1-4 further defines the purpose of each command and response PDU.Table 1-4. Command Names and Definiti

Logical Link Control Overview117357-A Rev. A 1-17 Command/ResponseControl Field ValueDefinitionReceiver Ready (RR)01xx The RR command PDU indicates tha

Configuring LLC Services1-18 117357-A Rev. AInformation FieldThe contents of the Information field depend on the type of PDU in which it appears, as fo

Logical Link Control Overview117357-A Rev. A 1-19 • The Information field of an FRMR PDU contains the reason for PDU rejection by an LLC. (The contents

117357-A Rev. A 2-1 Chapter 2LLC2 Routed over Frame RelayLLC2 (connection-oriented service) in a Bay Networks router supports Frame Relay with both Da

iv 117357-A Rev. A its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files,

Configuring LLC Services2-2 117357-A Rev. ADSPUs attached to the router retain full visibility for IBM NetView management. The router passes through a

LLC2 Routed over Frame Relay117357-A Rev. A 2-3 Figure 2-1. Sample Frame Relay Network Using LLC2Bay Networks routerwith DLSw or APPNIBM Communication

Configuring LLC Services2-4 117357-A Rev. AFRAD-like FunctionalityToken Ring, Ethernet, and SDLC endstations communicate with a Frame Relay attached h

LLC2 Routed over Frame Relay117357-A Rev. A 2-5 When the router receives an LLC frame from the DLSw network with a dmac not starting with the virtual

Configuring LLC Services2-6 117357-A Rev. AVirtual MAC to Frame RelayFigure 2-2 illustrates a sample virtual MAC address to Frame Relay DLCI mapping.

LLC2 Routed over Frame Relay117357-A Rev. A 2-7 Frame Relay to Virtual MACFigure 2-3 illustrates a sample Frame Relay DLCI to virtual MAC address mapp

Configuring LLC Services2-8 117357-A Rev. APhysical MAC to Frame RelayFigure 2-4 illustrates a sample physical MAC address to Frame Relay DLCI mapping

LLC2 Routed over Frame Relay117357-A Rev. A 2-9 Frame Relay to Physical MACFigure 2-5 illustrates a sample Frame Relay DLCI to Physical MAC mapping. I

Configuring LLC Services2-10 117357-A Rev. AFigure 2-5. Frame Relay to Physical MAC TopologyFrame Relay to Frame RelayFigure 2-6 illustrates a sample

LLC2 Routed over Frame Relay117357-A Rev. A 2-11 Router A always sets the source MAC address equal to the virtual MAC address, even if there is a remo

117357-A Rev. A v Contents About This Guide Before You Begin ...

Configuring LLC Services2-12 117357-A Rev. ALLC2 over Frame Relay: Routed versus BridgedFigure 2-7 illustrates (a) SNA over Frame Relay with source-ro

LLC2 Routed over Frame Relay117357-A Rev. A 2-13 For More Information about LLC2 over Frame RelayThe following publications give technical detail on L

117357-A Rev. A 3-1 Chapter 3Enabling LLC ServicesThis chapter describes how to enable LLC services. It assumes that you have read Configuring and Mana

Configuring LLC Services3-2 117357-A Rev. AEnabling LLC2 on an InterfaceTo enable LLC2 on an interface, select LLC2 from the Select Protocols window (

Enabling LLC Services117357-A Rev. A 3-3 Enabling LLC2 Services over Native Frame RelayIf you are configuring and enabling Frame Relay on LLC2 media, C

Configuring LLC Services3-4 117357-A Rev. AFigure 3-3. Select Protocols WindowFor APPN Networks1. Select APPN from the Select Protocols window.The Con

Enabling LLC Services117357-A Rev. A 3-5 3.Select Cancel. This selects native (routed) Frame Relay for LLC2.4. In the APPN Local Node Name Configuratio

Configuring LLC Services3-6 117357-A Rev. AFigure 3-5. LLC2 Frame Relay Mappings Window4.Select Add. The LLC2 Frame Relay Mapping Add window appears (

Enabling LLC Services117357-A Rev. A 3-7 Figure 3-6. LLC2 Frame Relay Mapping Add Window5.Specify the DLCI, Remote MAC, and Local MAC parameters, as f

vi 117357-A Rev. A Control Field Formats ...1-14Informatio

Configuring LLC Services3-8 117357-A Rev. A Parameter: Remote MAC Default: None Options: Standard MSB Token Ring MAC addresses Function: Provides the

Enabling LLC Services117357-A Rev. A 3-9 Figure 3-7. LLC2 Frame Relay Mappings Window with DLCI Added7.Select Apply.Repeat Steps 4 through 6 for addit

117357-A Rev. A 4-1 Chapter 4Editing LLC ParametersYou can edit the parameters for the LLC interfaces that you configure on the router.When you configur

Configuring LLC Services4-2 117357-A Rev. AConfiguring LLC ParametersTo access and edit LLC parameters, begin at the Configuration Manager window (Figur

Editing LLC Parameters117357-A Rev. A 4-3 Editing LLC2 Global ParametersOnly the Enable parameter is visible at the global (router) level for LLC. To

Configuring LLC Services4-4 117357-A Rev. A Parameter: Enable Default: Enable Options: Enable | Disable Function: Globally enables or disables the sys

Editing LLC Parameters117357-A Rev. A 4-5 Figure 4-3. LLC2 Interface Configuration WindowUse the scroll bar on the lower right of your screen to view m

Configuring LLC Services4-6 117357-A Rev. AThe LLC2 Interface Configuration window contains the following information fields:• The upper-left quarter co

Editing LLC Parameters117357-A Rev. A 4-7 Parameter: Enable Default: Enable Options: Enable | Disable Function: Enables or disables the LLC2 interfac

117357-A Rev. A vii Appendix A LLC2 Default SettingsIndex

Configuring LLC Services4-8 117357-A Rev. A Parameter: Max Octets in I Default: 5128 (octets) Range: 1 to 5128 Function: Specifies, in octets, the size

Editing LLC Parameters117357-A Rev. A 4-9 Parameter: Send Window Default: 7 (PDUs) Range: 1 to 127 Function: Specifies a maximum number of Information

Configuring LLC Services4-10 117357-A Rev. A Parameter: Ack Timer for Xmt Default: 1 s Range: 1 to 15 Function: Specifies the amount of time, in secon

Editing LLC Parameters117357-A Rev. A 4-11 Parameter: Reject Timer Default: 1 s Range: 1 to 30 Function: Specifies the amount of time, in seconds, du

Configuring LLC Services4-12 117357-A Rev. A Parameter: Inactivity Timer Default: 30 s Range: 1 to 30 Function: Specifies the amount of time, in second

Editing LLC Parameters117357-A Rev. A 4-13 Parameter: Frame Relay Virtual MAC Address Mask Default: 0x400000FF Options: Octal string Function: This m

Configuring LLC Services4-14 117357-A Rev. ADeleting an LLC2 InterfaceTo delete an LLC2 interface from its associated physical circuit, start at the L

117357-A Rev. A A-1 Appendix ALLC2 Default SettingsTables A-1 and A-2 list the default settings for LLC2 parameters. Use the Configuration Manager to e

Configuring LLC ServicesA-2 117357-A Rev. ABusy Timer 60 sInactivity Timer 30 sMax Links 255 (logical connections)Frame Relay Virtual MAC Address Mask

117357-A Rev. A Index-1AAck Timer for Xmt parameter, 4-10address mapping, 2-4 to 2-11address mask, 4-13addresses, real and virtual, 2-4BBay Networks P

Index-2 117357-A Rev. AFFRAD (frame relay access device)use of in LLC2, 2-1, 2-4Frame Relay, 1-3 to 1-5Frame Relay Mappings window, 3-6Frame Relay to

117357-A Rev. A Index-3Frame Relay Virtual MAC Address Mask, 4-13Inactivity Timer, 4-12Local MAC, 3-8Max Links, 4-12Max Octets in I, 4-8Max Octets in

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117357-A Rev. A ix Figures Figure 1-1. Sample Frame Relay Network ................1-5Figure 1-2. The