Router User's Guide
Table Of Contents
- Contents
- About This Guide
- 1. About the FrameSaver SLV
- 2. User Interface and Basic Operation
- 3. Configuration Procedures
- 4. Configuration Options
- Using the Easy Install Feature
- Using RIP with FrameSaver SLV CSU/DSUs
- Entering System Information and Setting the System Clock
- Setting Up the Modem
- Setting Up Auto-Configuration
- Setting Up Dial Backup
- PVC Backup Over the Network Interface
- Setting Up Back-to-Back Operation
- Configuration Option Tables
- Configuring the Overall System
- Configuring Physical Interfaces
- Assigning Time Slots/Cross Connections
- Configuring Frame Relay for an Interface
- Manually Configuring DLCI Records
- Configuring PVC Connections
- Configuring the IP Path List
- Setting Up Management and Communication Options
- Configuring the Criteria for Automatic Backup
- 5. Configuring the FrameSaver SLV Router
- FrameSaver SLV Router Overview
- IP Routing
- Address Resolution Protocol
- Proxy ARP
- Interface Configuration
- Network Address Translation
- Network Address Port Translation
- Dynamic Host Configuration Protocol Server
- DHCP Relay Agent
- Router Security
- Provisioning the Router Interface
- Configuring the Router Using Terminal Emulation
- 6. Security and Logins
- 7. Operation and Maintenance
- 8. Troubleshooting
- 9. Setting Up OpenLane for FrameSaver Devices and Activating SLM Features
- 10. Setting Up NetScout Manager Plus for FrameSaver Devices
- 11. Setting Up Network Health for FrameSaver Devices
- A. Menu Hierarchy
- B. SNMP MIBs and Traps, and RMON Alarm Defaults
- C. Router CLI Commands, Codes, and Designations
- D. Router Command Line Summaries and Shortcuts
- E. Connectors, Cables, and Pin Assignments
- F. Technical Specifications
- G. Equipment List
- Index
8. Troubleshooting
9128-A2-GB20-80 September 2002
8-31
Send Line Loopback
The remote Line Loopback (LLB) up and down codes are in-band codes that allow
control of a remote device. The LLB Up code invokes a line loopback in the remote
unit while the LLB Down code terminates the remote line loopback. Network
loopbacks are defined in AT&T TR 62411.
A remote LLB cannot be started when one of the following tests is active:
Any Loopback on the same interface.
Send Pattern Test on this network interface or any synchronous data port (Port
Use set to Synchronous) assigned to this interface.
Send V.54 or FT1 Loopback, or Data Channel Loopback on any synchronous
data port (Port Use set to Synchronous) and assigned to this network
interface.
Data Channel Loopback on the frame relay link on this network interface.
Procedure
To start and stop a Line Loopback:
1. Follow this menu selection sequence:
Main Menu
→
Test
→
Network Physical Tests
2. Select the
Up
code in the Send Line Loopback row to put a remote device in
loopback.
3. To start the test, highlight
Send
under Command in the Send Line Loopback
row and press Enter. The code is sent for up to 10 seconds, or until an
acknowledgement is received from the remote end. The length of time that the
test has been running is shown in the Results column.
4. To stop the test, send the
Down
code to take the remote device out of
loopback.