Sonet | Cabletron Systems 2.2 instruction

Bridging

The ITU, or International Telecommunications Union (formerly known as the CCITTÑthe Consultative Committee on International Telegraph and Telephone) incorporated the SONET standard into its Synchronous Digital Hierarchy (SDH) recommendations, which address differences between the European and North American transmission standards. The ITU sets standards for international communications (except for nations adhering to ANSI standards). SDH is a world standard, and as such, the SONET standard is considered a subset within it.

The SDH transmission hierarchy uses the STM-1 (Synchronous Transfer Module Level 1) as its basic building block signal (transmitted at 155.52 Mbps). Again, there are STM-N signals, which are STM-1 signals that have been multiplexed into a higher signaling rate.

Table 2-1. SONET/SDH Transmission Hierarchies

SONET

Bit Rate

SDH

	STS-1/OC-1	51.84 Mbps	Ñ

	STS-3/OC-3 (supports	155.52 Mbps	STM-1 (supports
	FE-100Sx and APIM-2x		FE-100Sx and APIM-2x
	in SONET operational		in SDH operational
	mode)		mode)

	STS-12/OC-12	622.08 Mbps	STM-4

	STS-24/OC-24	1244.16 Mbps	Ñ

	STS-48/OC-48	2588.32 Mbps	STM-16

	STS-192/OC-192	9953.28 Mbps	STM-64

You should be sure that the operational mode for both the local and remote ends of the SONET connection is set appropriately for your region. Setting the wrong operational mode may cause errors to be generated during transmission, since there are slight differences in framing SONET and SDH signals.

To access the SONET/SDH ConÞguration window from the Bridge Status

window:

1.Click on the desired Port button () to display the Port menu.

2.Click on SONET/SDH Conﬁguration. The SONET/SDH Conﬁguration: Port X window, Figure 2-25, will appear.

To access the SONET/SDH ConÞguration window from the Chassis View window:

1.Click on the appropriate port index to access the Port menu.

2.Click on SONET/SDH Conﬁguration. The SONET/SDH Conﬁguration: Port X window, Figure 2-25, will appear.

2-78	SONET Port Conﬁguration

Image 96

Cabletron Systems 2.2 manual Sonet

Contents

Bridge/Router Interface Brim User’s Guide Page Virus Disclaimer Restricted Rights Notice Contents Contents Chapter Fddi Applications Chapter WAN ApplicationsChapter ATM Conﬁguration 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 Common Device Window Fields Device NameIP Address 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 Accessing Bridge Status Window Options Bridge State on InterfaceInterface Type 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 Errors Red Frames Forwarded GreenFiltered Magenta Xmitted Blue Bridge Detail Breakdown Errors Frames ForwardedFiltered Xmitted Interface Statistics Forwarded toForwarded from Description AddressType Error UnicastNon-Unicast Discarded Receive Errors Csmacd Statistics Transmission Errors Collision Errors PPP Link Statistics Errors Statistics Dot5 Errors Line Errors Burst Errors Internal Errors Congestion ErrorsToken Errors Soft Errors Source Route Statistics Received Frames Transmitted Frames Discards Spanning Tree Bridge Level Bridge Priority Root Bridge Root CostRoot Port Protocol Bridge Port Level Path Cost Designated CostDesignated Root 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 List NumberCapacity Aging Time Conﬁguring the Filtering Database Port FilteringAltering the Aging Time Changing the Type of Entry Changing the Receive PortChanging the Port Filtering Action 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 Destination Address Source AddressData Type 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 Setting the Bridge Method NetBIOSProtocol Transmission Methods Source Route Transparent Source Route Conﬁguration 16. Source Route ConÞguration Window Source Routing Information Source Route Conﬁguration Subnet Mask Local Segment Target SegmentHop Count Limit 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 Port Mode Novell TranslationRing Speed 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 Current Operational Mode Desired Operational ModePort Type 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 Port NameMode 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 SMT Version Req. Requested Target Token Rotation TimeNeg. Negotiated Concentrator M Ports Connection Policy Window Concentrator Non-M PortsNumber of MACs 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 Inspeed OutspeedClock Source State Change Conﬁguring T-1 Ports WAN Port NameLine Type Line Coding Loopback Mode Signal ModeCircuit ID 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 T1 Admin/Status Admin StatusOper and Admin WAN Interfaces Displaying Synchronous Port Statistics Enabling and Disabling WAN T1 InterfacesFrame Check Total Errors Xmit UnderRunsReceive OverRuns 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