Monitoring And Diagnostic Tools Overview; Monitoring Tools Overview - Juniper J2300 User Manual

J-series™ Services Router User Guide
Term
Internet Control Message
Protocol (ICMP)
routing instance
loose source routing
routing table
strict source routing
time to live (TTL)
type of service (TOS)

Monitoring and Diagnostic Tools Overview

Use the J-Web Monitor, Manage, and Diagnose options to monitor and diagnose a
Services Router. J-Web results are displayed in the browser.
You can also monitor and diagnose the router with CLI operational mode
commands. CLI command output appears on the screen of your console or
management device, or you can filter the output to a file.
This section contains the following topics:

Monitoring Tools Overview

J-Web monitoring tools consist of the options that appear when you
select Monitor in the task bar. The Monitor options display diagnostic
information about the Services Router.
Alternatively, you can enter
information, and often greater detail. CLI
configuration and information about interfaces, routing protocols, routing
198
Monitoring and Diagnostic Tools Overview
Definition
TCP/IP protocol used to send error and information messages.
Collection of routing tables, interfaces, and routing protocol interfaces. The set of interfaces
belongs to the routing tables, and the routing protocol parameters control the information
in the routing tables.
Option in the IP header used to route a packet based on information supplied by the source. A
gateway or host must route the packet using the routers specified by this information, but the
packet can use other routers along the way.
Database of routes learned from one or more protocols.
Option in the IP header used to route a packet based on information supplied by the source. A
gateway or host must route the packet exactly as specified by this information.
Value (octet) in the IP header that is (usually) decremented by 1 for each hop the packet passes
through. If the field reaches zero, the packet is discarded and a corresponding error message
is sent to the source of the packet.
Value (octet) in the IP header that defines the service the source host requests, such as the
packet's priority and the preferred delay, throughput, and reliability.
Monitoring Tools Overview on page 198
J-Web Diagnostic Tools Overview on page 200
CLI Diagnostic Commands Overview on page 201
Filtering Command Output on page 202
commands from the CLI to display the same
show
commands display the current
show