CSU/DSU Port 55x bridge/router 45x, Performed | 3Com NETBuilder SI

Performing Loopback Tests 137

6To determine the current status of the loopback test, either locally-initiated or remotely-initiated, and to determine if the V.54 loopback detection is on, enter:

	SHow -SYSV54Lback
Performing a Local	This section describes how to perform a local loopback test using the
Loopback Test on the	loopback plug on the built-in 56/64 Kbps CSU/DSU on the model 45x and
CSU/DSU Port	55x bridge/router.
(45x and 55x)	Figure 11 shows the data ﬂow that occurs when this loopback test is

	performed.
	Figure 11 CSU/DSU Local Loopback Testing

CSU/DSU port

with loopback plug

Before running the CSU/DSU loopback test, attach a console or Telnet to your bridge/router.

To perform a local loopback test on the built-in CSU/DSU, follow these steps:

1Uncable the WAN port and insert the loopback plug that came with your system.

2Set the baud rate to 56 Kbps by entering:

SETDefault !3 -PATH Baud = 56

SETDefault !3 -PATH CONTrol = Enable

3Set the owner of the WAN port to loopback by entering:

SETDefault !3 -PORT OWNer = LoopBack

4Select the loopback test mode by entering:

DLTest TestMode LoopBack

Image 137

3Com NETBuilder SI CSU/DSU Port 55x bridge/router 45x, Performed, Set the owner of the WAN port to loopback by entering

Contents

Using the SuperStack NETBuilder SI Bridge/Router Electromagnetic Compatibility Information Avis Canadien Canadian Certiﬁcation Notice CE Notice Page Contents Isdn U Mounting Kit Installing on a Tabletop Conﬁguring Serial Ports with DTEs Where to Go From Here Setting Up SecurityPaths, Ports, and Virtual Ports Paths and Ports Multiple Static Paths per Port Virtual Ports Conﬁguring X.25 Scenario 1 Multiple Destinations, Nonmeshed Configuring Bridging and Routing 113 Dialing the Same Phone Number Multiple Times Using the Monitor Utility 121 Boot Conﬁgure Flash Load 122116 122 Display Files Dump Reloading the Software Load Errors 148 Verifying the Memory Dump Procedure 149125 LAN LEDs 143 178 177179 180 194 Ordering Dutch Isdn BRI Services 195RS-530 DTE Cable Pinouts Conventions About this GuideList conventions that are used throughout this guide Icon Alerts you to Compliance Year3Com Year 2000 Web Text Conventions Features Features and SpecificationsFeatures of the SuperStack II NETBuilder SI Bridge/Router Feature Description Panels Back and Front Model Front panel and are for 3Com use only DIP Switches Requirements Reset ButtonSerial Device Features and Specifications Using Ethernet LAN Using the BRIDGE/ROUTER Your NetworkOverview Ports Using the BRIDGE/ROUTER in Your Network Telco Services Packet-Switched Services Using PPP on Dial-Up and Leased LinesUsing Packet-Switched Network Services Telco Services Using the BRIDGE/ROUTER in Your Network Required Installing the HardwareEquipment Bridge/router For more information on cables, see Appendix D EnvironmentalProvides the environmental requirements of the SuperStack Bridge/routers Brackets, or mount the bridge/router in a rack MountingBridge/Router Stacking Bridge/Routers Brackets Mounting the Bridge/Router Cabling ConnectorsFollowing WAN ports Isdn S/T 43x and 53x, Isdn U 44x Functional Model 44x and 54x Isdn U Connector Model 43x and 53x Isdn S/TModels 44x and 54x bridge/routers have an Isdn U connector Model 46x and 56x T1/FT1 T1/FT1 Telco port uses an RJ-48 connectorModel 45x and 54x 56/64K CSU/DSU Model Redundant Power System RPS Redundant PowerAttaching a System Characteristic Setting Power switchShutting Down Turn on the device Installing the Hardware Cover Installing or Removing AN Interface ModuleRemoving Remove the cover Existing Module Removing anModel These steps Reinstall the cover and the cover screws Remove the screw from the standoff if necessary Move the jumper to the right-hand set of pinsModule Model Insert the new module Removing an Front panel Move the jumper to Left-hand set of pins 5xx Installing a NewSteps Remove the screw from the standoff if necessary Front panel Connectors Installing a New Module Model 5xx Installing or Removing AN Interface Module Administrative Task Summary Logging on and Performing Administrative TasksTurning on Other end to the RPS Status LED Status at Successful Startup Logging on to Attaching a Console Logging on and Performing Administrative Tasks To use the command-line interface, follow these steps If you have not selected a particular service, enterTo use the menu-driven interface, follow these steps Interface For more information on syntax, see Appendix C Accessing and executing software commands and parameters PasswordChanging the Root Return key Changing Default ConsolePort Baud Rate Adding User Information Setting the Time and DateSetting System DELete -SNMP COMmunity anycom ADD -SNMP COMmunity anycom RO Relationship Between Physical Paths and Logical Ports Basic Configuration of Ports Paths Option Description Port and Path Options Node That Virtual Ports Topologies that Require Virtual Ports Virtual Ports over Frame Relay Protocol Technique Virtual Ports over PPPConnectivity in Partially Meshed and Nonmeshed Topologies Parent Ports for Frame Relay Numbering Path and PortSuperStack II bridge/router Path and Port Numbering for Model 43x , 44x, 53x, Conﬁguring Isdn Conﬁguring Ethernet Paths PortsOn the WAN Port 43x, 44x, 53x, Conﬁguring Isdn Europe, Australia Asia SwitchType Setting Country or Region Isdn Switch Types Supported Toggle the respective paths by entering Example Conﬁguring the T1/FT1 RJ-48 Telco Port Model 46x Re-enable the path by enteringConﬁguring the 56/64 Kbps CSU/DSU WAN Port Model 45x Re-enable the path using Set the baud rate 56 or 64 kbps for the DS0 channel usingSet the path clock using Line type leased Set the owner of the serial port using Here Where to Go FromRouting Port and path conﬁguration Basic Configuration of Ports and Paths Bandwidth Management Feature Description Advanced Configuration Ports and PathsBandwidth Management Features for Dial-Up Lines Isdn on the WAN Port 43x, 44x, 53x Start here Scenario 1 Using Each B Channel Separately Scenario 3 Connecting to Multiple Destinations Scenario 2 Using Both B Channels Together Call Berkeley Multiple destinations connect with a dial pool Scenario 1 Single Destination per Port 128 K 28.8 K Scenario 2 Multiple Destinations PaloAlto Andover Princeton Set the normal bandwidth if required using Management for PPP Setting Normal BandwidthKbps. Show the normal bandwidth for a port using Enabling Dial-On-Demand Using Manual DialPlace the call using Conﬁguring Bandwidth-On-Demand Enable disaster recovery using Conﬁguring Disaster RecoveryConﬁgure the back-up line for disaster recovery only using Conﬁgure the dial number list for the back-up line using Conﬁguring Frame Relay Site B Site C Port !5 path Trafﬁc from one site to another over the same parent port Site a Configuring X.25 311041501111 See to conﬁgure bridging, IP routing, and IPX routing. To Conﬁgure other protocols, see Using Enterprise OS Software Advanced Configuration of Ports and Paths Configuring Bridging Routing Conﬁguring IP Routing To enable bridging, enter IP Routing Enable IP routing by entering Routing Between Gateways To delete a static route, use Adding a Route Statically in a Subnet Masked Environment Subnet Masks Override Option To enable Ospf on a speciﬁed port, use Ospf over Dial-On-Demand Dial-Up Lines Using a Static RouteUsing Ospf SHow -IP NETaddr Routing Conﬁguring IPX Deﬁning a Default Route To provide a name for your path and port, use Customizing Your SoftwareNaming Paths and Ports Module Autobaud Feature Number Lists Working with Dial Phone number is case-sensitive and must be matched exactly 56/64 Kbps Using Statistics onCSU/DSU Port 45x Network Statistics Using Statistics on the T1/FT1 RJ-48 Telco Port 46x Displays similar to the following will appear Display similar to the following appears Displays similar to the following appear when you enterStatistics Conﬁguring Data Show all T1/FT1 parameters conﬁgured usingCompression T1/FT1 Parameter Customizing Your Software Using the Monitor TroubleshootingBoot Utility Clear Eeprom Conﬁgure Flash LoadDisplay Files Dump Reset Repeat Last CommandFlash Load Help Meanings Normal LEDBridge/router LEDs System LEDs The following ﬁgure describes the system LEDs LAN LEDs The following ﬁgure describes the LAN LEDs WAN Meaning Meaning ﬁle system is empty ActionAction Reload the software. See Appendix B Reload the software. See Appendix B Image names do not match Default path isAction Follow these steps At the monitor prompt, enter Meaning File too large Action Meaning Unspeciﬁed fatal error Action Meaning File read or decompression error ActionMeaning File checksum error Action Conﬁguration and verify the media access control MAC Meaning Unable to transmit Bootp request ActionConnected correctly to the Ethernet network Be present or is incorrectly conﬁgured Be incorrectly conﬁgured Power off and then on again to retry the system softwareConﬁgured Load. If the load is unsuccessful, contact your network Contact your network supplier PhaseEeprom checksum test failed WAN Loopback Tests Performing To dial path 3.1 from path 3.2, enter Conﬁgure the ports for loopback testing by entering Stop the DLTest by entering Start the DLtest usingDisconnect the call by entering Change the port owner from loopback to PPP by entering To stop the loopback test, enter To disable V.54 detection, enterStart the loopback test by entering CSU/DSU Port 55x bridge/router 45x Select the loopback test mode by enteringPerformed Set the owner of the WAN port to loopback by entering Stop the loopback test by entering Specify the number of seconds that the test should run using To turn on autobaud, enter Enable the port by entering To start the remote CSU loopback test on path 2, enter Start remote loopback test usingTo start the remote DSU loopback test on path 2, enter To view the status of the loopback test in progress, enter 46x T1/FT1 Port 56x bridge/router Enable V.54 signal detection by entering Reenable the WAN port by enteringT1/FT1 Port Supports ATT On the T1/FT1 Port Start the serial loopback test by entering Performing a Loopback Test on a Serial Port Stop the serial loopback test by entering Memory Dump Select Dump Destination Following options are available SysInfo To create a memory dump ﬁle, follow these steps See the Unix system documentation if you have any problems System responds with the following information Appendix a Troubleshooting Software Reloading the System B SoftwareReloading Load Errors Full Form Syntax Syntax Conventions Command syntax. These symbols are summarized in Table SymbolsCommand Syntax Symbols SymbolDescription Examples FullAbbreviated Syntax Variations Command Syntax Service Names Using AliasesCommand Lines Entering Substitution Command History ISDN-Related Privilege LevelSyntax Variation Models 43x Asterisk, for example Getting HelpWith different options as described in Table Online Help Syntax Summary SYS? Appendix C Syntax Conventions Console Connector Connectors and CablesCables PC Cable Pin to 25-pin Terminal Cable Null Modem-Type Ethernet Connector LAN ConnectorEither 10BASE-T or 100BASE-TX cabling To full router software, the second port will be functional Creating a Valid Network Cabling StandardsCable Support and Emissions Compliance Emissions Compliance Shows examples of collision domain diameters Collision Domain Diameter with No Repeater For expanded guidelines, refer to the Ieee Standard Collision Domain Diameter with Two Repeaters Maximum Cable Length in Example Collision Domain Diameters Shows the pin assignments of the Isdn S/T cable Shows the pinouts of the Isdn U cable CSU/DSU Cable RJ-48S male shielded Name Abbr Serial Connectors Flex-WAN Cables Connecting the Bridge/Router to a DTE Using a DCE Cable 10 ft Flex-WAN CablesCable Length Cable Type Part Number Pinouts RS-232 DTE Cable Pinouts Pinouts Flex-WAN Connector Signal Pin Direction Twisted Pair Flex-WAN and RS-232 DCE Connectors 35 DTE Cable Pinouts Flex-WAN and V.35 DTE Connectors 35 DCE Cable Pinouts Flex-WAN and V.35 DCE Connectors 21 DTE Cable Pinouts Flex-WAN and X.21 DTE Connectors 21 DCE Cable Pinouts Flex-WAN and X.21 DCE Connectors RS-449 DTE Cable Pinouts Flex-WAN and RS-449 DTE Connectors Flex-WAN and RS-449 DCE Connectors RS-449 DCE Cable Pinouts Flex-WAN and RS-530 DTE Connectors Flex-WAN Connector RS-530 DTE Connector Signal Pin Direction Provisioning Your Isdn Line Canadian Isdn BRI Services AT&T 5ESS NI1 Isdn Switch Type Ordering Isdn Service for an AT&T 5ESS Switch AT&T 5ESS SwitchAT&T 5ESS Custom DMS 100 and National Isdn Siemens Ewsd 189 DN must be set as follows Parameter Setting AT&T 5ESS Custom SwitchRequired Information Specification 191 Ordering Isdn Service for a DMS 100 SwitchDMS 100 and National Isdn Ordering Isdn Service for a Siemens Ewsd Switch Siemens Ewsd Switch NT1s and Power Supplies Isdn BRI Services Ordering Dutch Appendix E Provisioning Your Isdn Line 3Com FTP Site Technical SupportOnline Technical Access by Digital Modem Access by Analog ModemHours a day, 7 days a week 847 262 Support from 3Com Support from YourNetwork Supplier North America Country Telephone Number Fax Number Page Numerics Index Isdn Index Ipxwan 109 Isdn Index Snmp DCE connector described Index 3Com Corporation Limited Warranty