- play_arrow Operation, Administration, and Management Features
- play_arrow Ethernet OAM and Connectivity Fault Management for Routers
- Introduction to OAM Connectivity Fault Management (CFM)
- Configure Connectivity Fault Management (CFM)
- CFM Action Profile
- Ethernet Local Management Interface
- CFM Support for CCC Encapsulated Packets
- Configure Unified ISSU for 802.1ag CFM
- CFM Monitoring between CE and PE Devices
- Configure Continuity Check Messages
- Example: Configure Ethernet CFM on Physical Interfaces
- Example: Configure Ethernet CFM on Bridge Connections
- Example: Configure Ethernet CFM over VPLS
- play_arrow Link Fault Management for Routers
- play_arrow Ethernet OAM Link Fault Management for Switches
- play_arrow Ethernet OAM Connectivity Fault Management for Switches
- play_arrow Ethernet Frame Delay
- Ethernet Frame Delay Measurements on Switches
- Configure MEP Interfaces on Switches to Support Ethernet Frame Delay Measurements (CLI Procedure)
- Configure One-Way Ethernet Frame Delay Measurements on Switches (CLI Procedure)
- Configure an Iterator Profile on a Switch (CLI Procedure)
- Trigger an Ethernet Frame Delay Measurement Session on a Switch
- Configure Two-Way Ethernet Frame Delay Measurements on Switches (CLI Procedure)
- play_arrow Ethernet Service OAM (ITU-TY.1731) for Routers
- ITU-T Y.1731 Ethernet Service OAM Overview
- Configure Ethernet Frame Delay Measurement Sessions
- Configuring MEP Interfaces to Support Ethernet Frame Delay Measurements
- Configure Ethernet Frame Loss Measurement
- Configure an Iterator Profile
- Configure Ethernet Synthetic Loss Measurements
- Ethernet Alarm Indication
- Inline Transmission Mode
-
- play_arrow Network Monitoring by using SNMP
- SNMP Architecture and SNMP MIBs Overview
- Understand SNMP Implementation in Junos OS
- Configure SNMP in Junos OS
- Configure Options on Managed Devices for Better SNMP Response Time
- Enterprise Specific Utility MIB to Enhance SNMP Coverage
- Optimize the Network Management System Configuration for the Best Results
- Interfaces to Accept SNMP Requests
- Configure SNMP for Routing Instances
- Configure SNMP Remote Operations
- SNMP Traps
- SNMP Traps Supported by Junos OS
- Trace SNMP Activity
- Access Privileges for an SNMP Group
- Configure Local Engine ID on SNMPv3
- Configure SNMPv3
- Configure SNMPv3 Authentication Type and Encryption Type
- SNMPv3 Traps
- SNMPv3 Informs
- SNMP Communities
- MIB Views
- SNMP MIBs Supported by Junos OS and Junos OS Evolved
- Junos OS SNMP FAQs
- play_arrow Remote Network Monitoring (RMON) with SNMP Alarms and Events
- play_arrow Accounting Options
- play_arrow Monitoring Options
- play_arrow Interface Alarms
- play_arrow IP Monitoring
- play_arrow sFlow Monitoring Technology
- play_arrow Adaptive Sampling for Routers and Switches
- play_arrow Packet Flow Accelerator Diagnostics Software
-
- play_arrow Monitoring Common Security Features
- play_arrow Performance Management
- play_arrow Port Mirroring
- play_arrow Port Mirroring and Analyzers
- Port Mirroring and Analyzers
- Configuring Port Mirroring and Analyzers
- Configuring Port Mirroring Instances
- Configuring Port Mirroring on Physical Interfaces
- Configuring Port Mirroring on Logical Interfaces
- Configuring Port Mirroring for Multiple Destinations
- Configuring Port Mirroring for Remote Destinations
- Configuring Port Mirroring Local and Remote Analysis
- 1:N Port Mirroring to Multiple Destinations on Switches
- Example: Configure Port Mirroring with Family any and a Firewall Filter
- Monitoring Port Mirroring
- Configure Packet Mirroring with Layer 2 Headers for Layer 3 Forwarded Traffic
- Troubleshooting Port Mirroring
-
- play_arrow System Log Messages
- play_arrow Network Management and Troubleshooting
- Compressing Troubleshooting Logs from /var/logs to Send to Juniper Networks Technical Support
- Monitoring and Troubleshooting
- Troubleshooting System Performance with Resource Monitoring Methodology
- Configuring Data Path Debugging and Trace Options
- Using MPLS to Diagnose LSPs, VPNs, and Layer 2 Circuits
- Using Packet Capture to Analyze Network Traffic
- On-Box Packet Sniffer Overview
- Troubleshooting Security Devices
- play_arrow Configuration Statements and Operational Commands
ON THIS PAGE
Diagnostic Tools Overview
Juniper Networks devices support a suite of J-Web tools and CLI operational mode commands for evaluating system health and performance. Diagnostic tools and commands test the connectivity and reachability of hosts in the network.
Use the J-Web Diagnose options to diagnose a device. J-Web results appear in the browser.
Use CLI operational mode commands to diagnose a device. You can view the CLI command output on the console or management device. You can filter the output to a file.
To use the J-Web user interface and CLI operational tools, you must have the appropriate access privileges.
This section contains the following topics:
J-Web Diagnostic Tools
The J-Web diagnostic tools consist of the options that appear when you select Troubleshoot and Maintain in the task bar. Table 1 describes the functions of the Troubleshoot options.
Option | Function |
|---|---|
| Troubleshoot Options | |
Ping Host | Allows you to ping a remote host. You can configure advanced options for the ping operation. |
Ping MPLS | Allows you to ping an MPLS endpoint using various options. |
Traceroute | Allows you to trace a route between the device and a remote host. You can configure advanced options for the traceroute operation. |
Packet Capture | Allows you to capture and analyze router control traffic. |
| Maintain Options | |
Files | Allows you to manage log, temporary, and core files on the device. |
Upgrade | Allows you to upgrade and manage Junos OS packages. |
Licenses | Displays the summary of the licenses needed and used for each feature that requires a license. Allows you to add licenses. |
Reboot | Allows you to reboot the device at a specified time. |
CLI Diagnostic Commands
The CLI commands available in operational mode allow you to perform the same monitoring, troubleshooting, and management tasks you can perform with the J-Web user interface. Instead of invoking the tools through a graphical interface, you use operational mode commands to perform the tasks.
CLI command output appears on the screen of your console or management device, or you
can filter the output to a file. For operational commands that display output, such
as the show commands, you can redirect the output into a filter or
a file. When you display help about these commands, one of the options listed is
|, called a pipe, which allows you to filter the command
output.
You can use the
mtrace command to display trace information about a multicast
path from a source to a
receiver.
To view a list of top-level operational mode commands, type a question mark (?) at the command-line prompt.
You can view CLI diagnostic commands at the top level of operational mode listed in Table 2.
Command | Function |
|---|---|
| Controlling the CLI Environment | |
| Configures the CLI display. |
| Diagnosis and Troubleshooting | |
| Clears statistics and protocol database information. |
| Traces information about multicast paths from source to receiver. |
| Performs real-time debugging of various Junos OS components, including the routing protocols and interfaces. |
| Determines the reachability of a remote network host. |
| Determines the reachability of an MPLS endpoint using various options. |
| Tests the configuration and application of policy filters and AS path regular expressions. |
| Traces the route to a remote network host. |
| Connecting to Other Network Systems | |
| Opens secure shell connections. |
| Opens Telnet sessions to other hosts on the network. |
| Management | |
| Copies files from one location on the device to another, from the device to a remote system, or from a remote system to the device. |
| Restarts the various system processes, including the routing protocol, interface, and SNMP processes. |
| Performs system-level operations, including stopping and rebooting the device and loading Junos OS images. |
| Exits the CLI and starts a UNIX shell. |
| Enters configuration mode. |
| Exits the CLI and returns to the UNIX shell. |
