Snap Translation Table | Cabletron Systems 2.2 guide

Bridging

The SNAP Translation Table

The SNAP format table contains Ethernet type Þeld entries that the bridge uses to determine how to translate a Token Ring (802.5 with SNAP) packet to an Ethernet packet. If a Token Ring packet is received that matches the Ethernet type Þeld of an enabled entry, the bridge will translate the Token Ring packet to the frame format speciÞed by the button above the table. Otherwise, it will translate the packet to the opposite frame format.

Figure 2-37. SNAP Format Table

The SNAP Format Table contains the following Þelds:

Index

Displays the index of an entry in the Token Ring-to-Ethernet Translation table for Ethernet type Þelds. The index can range between 1 and 20.

SNAP

Displays the Ethernet type Þeld value which the bridge will use to translate all Token Ring 802.5 packets with a SNAP header and this type Þeld to the format speciÞed by the button. The Ethernet type Þeld value must be two octets.

State

Displays if this entry will be used in the packet translation process. If the state is Enabled the entry is used; if the state is Disabled the entry is not used.

Conﬁguring SNAP Translation

When you choose the SNAP format, you select the Ethernet frame format to which the bridge translates all Token Ring packets with a SNAP header whose Ethernet type resides in the table and whose entry is enabled.

To conÞgure the SNAP Translation Table:

1.Click on the SNAP Format button on the Bridge Translation window. It will toggle between the Enet and SNAP formats. The format that appears in the button is the one that is currently being used.

2.Click on the scroll box next to the entry and the scrollable window of entries will appear.

2-96	Setting Bridge Translation

Image 114

Cabletron Systems 2.2 manual Snap Translation Table, Conﬁguring Snap Translation

Contents

Bridge/Router Interface Brim User’s Guide Page Virus Disclaimer Restricted Rights Notice Contents Contents Chapter ATM Conﬁguration Chapter Fddi ApplicationsChapter WAN Applications Index Contents Introduction Using the Brim User’s Guide BRIM-E100 Related Manuals Brim Management Applications Using the Mouse Software Conventions Left Mouse Button Right Mouse Button IP Address Common Device Window FieldsDevice Name Location Using Window Buttons Using On-line Help Accessing On-line DocumentationGetting Help Getting Help from the Cabletron Systems Global Call Center Hours a day, 365 days a year Introduction Getting Help Bridging Basics About Transparent Bridging About Source Route Bridging Bridging About Source Route-Transparent Bridges About Source Route-Translational Bridges Viewing and Managing Bridging Interfaces Bridging Bridge Status Window Bridge Status Window Up Time Interface Type Accessing Bridge Status Window OptionsBridge State on Interface Bridge Address Bridging Bridging Bridging Bridging Enabling and Disabling All Installed Interfaces Enabling and Disabling BridgingEnabling and Disabling Individual Interfaces Bridge Statistics Performance Graphs Bridging Filtered Magenta Errors RedFrames Forwarded Green Xmitted Blue Bridge Detail Breakdown Filtered ErrorsFrames Forwarded Xmitted Interface Statistics Forwarded toForwarded from Description AddressType Non-Unicast ErrorUnicast Discarded Receive Errors Csmacd Statistics Transmission Errors Collision Errors PPP Link Statistics Errors Statistics Dot5 Errors Line Errors Burst Errors Token Errors Internal ErrorsCongestion Errors Soft Errors Source Route Statistics Received Frames Transmitted Frames Discards Spanning Tree Bridge Level Bridge Priority Root Port Root BridgeRoot Cost Protocol Bridge Port Level Designated Root Path CostDesignated Cost Designated Bridge Conﬁguring Spanning Tree Changing Bridge PriorityChanging the Spanning Tree Algorithm Protocol Type Changing Forwarding Delay Time Changing Hello TimeChanging Max Age Time Filtering Database Changing Port PriorityChanging Path Cost Bridging 11. The Filtering Database Window Capacity ListNumber Aging Time Conﬁguring the Filtering Database Port FilteringAltering the Aging Time Changing the Port Filtering Action Changing the Type of EntryChanging the Receive Port Adding or Deleting Individual Entries Special Filter Databases Clearing All Permanent, Static, or Dynamic Entries Ethernet and Token Ring Special Filter Database Windows Enable Special Filter Database WindowFile Data Type Destination AddressSource Address Data Offset Deﬁning and Editing Filters in the Special Database Setting the Port Filtering Action Changing the Receive PortsChanging the Port Filtering Action Enabling and Disabling a Filter Saving a Set of Filters to a FileClearing the Port Filtering Action Interface Conﬁguration Bridge Methods TransparentSource Routing Protocol Transmission Methods Setting the Bridge MethodNetBIOS Source Route Transparent Source Route Conﬁguration 16. Source Route ConÞguration Window Source Routing Information Source Route Conﬁguration Subnet Mask Hop Count Limit Local SegmentTarget Segment Spanning Tree Expl Spanning Tree Mode Bridge Number Using the Find Source Address Feature Making and Setting Changes Using the Port Source Addresses Window Setting the Aging Time Using the Token Ring Bridge and Port Conﬁguration Windows Bridging Virtual Ring Number Ring Number Ring Speed Port ModeNovell Translation Bridge Mode/Explorer Type Source Route/STE Duplex Modes Duplex Modes Window InterfaceFull Duplex Setting the Duplex Mode Ethernet Port Conﬁguration Standard Mode Fast Ethernet Port Conﬁguration Bridging Port Type Current Operational ModeDesired Operational Mode Link State Setting the Operational Mode for the FE-100TX Setting the Operational Mode for the FE-100FX Sonet Port ConﬁgurationSONET/SDH Conﬁguration Sonet SONET/SDH Statistics Bridging 26. The SONET/SDH Statistics Window Errors Statistics Bridging Conﬁguring SmartTrunking 27. The SmartTrunk ConÞguration and Status Window Mode PortName SmartTrunk State Bridging Conﬁguring Broadcast Suppression Token Ring Bridge Mode Setting Token Ring Bridge Mode Setting Bridge Translation Enabling and Disabling Auto and Dual Translate Modes 32. Bridge Translation Window Conﬁguring Token Ring Packet Translation Conﬁguring Novell Token Ring Packet Translation IBM Translation Table Index State Snap Translation Table Conﬁguring Snap Translation Using the Novell Translation Window Bridging Using the Physical View Windows for the Etwmim Ethernet Port Physical View Active Port Epim Type Token Ring Port Physical View 41. Token Ring Port Physical View Ring State FNB State Active Monitor Bridging 104 Using the Physical View Windows for the Etwmim Fddi Applications Accessing the Fddi Menu Conﬁguration Window MAC State Neg. Negotiated SMT VersionReq. Requested Target Token Rotation Time Concentrator M Ports Number of MACs Connection Policy WindowConcentrator Non-M Ports MAC Path Connection Policy Window 15 32,768 Ð a permanently set value for this bit Address Mode Station List WindowNumber of Nodes Node Class Upstream Neighbor Fddi Performance Window Transmit FramesReceive Frames Setting the Time Interval Frame ErrorsRing Ops Fddi Applications Fddi Performance Window Accessing the WAN Status Windows WAN Applications Viewing WAN Interface Status Current ActiveCurrent Primary Conﬁguring the Synchronous Connection Desired Primary Clock Source InspeedOutspeed State Change Line Type Conﬁguring T-1 PortsWAN Port Name Line Coding Circuit ID Loopback ModeSignal Mode Xmt Clock Source Using the T1 FracTable Conﬁguration Window Interface LineCoding Channels Max BandwidthConﬁguring the Fractional Table Restoring a Fractional Table Changing the Interface Line Coding Displaying the WAN Logical View Compression Changing WAN Logical Settings CRC Length Viewing the WAN Port Admin/Status Synchronous Admin/StatusOperational Status Oper and Admin T1 Admin/StatusAdmin Status WAN Interfaces Displaying Synchronous Port Statistics Enabling and Disabling WAN T1 InterfacesFrame Check Receive OverRuns Total ErrorsXmit UnderRuns Interrupted Frames WAN Applications Displaying Synchronous Port Statistics Accessing the ATM Connections Window ATM Conﬁguration Settings Connection Data Conﬁguring Connections VPI Adding a New Connection Deleting a Connection ATM Conﬁguration Conﬁguring Connections Index Index-2 Index-3 Index-4 Index-5 Index Index-6