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play_arrow Overview
- play_arrow Overview
play_arrow Configuration
- play_arrow Starting J-Web
  - Starting the J-Web Interface
- play_arrow J-Web Configuration Tools
- play_arrow System Basics Configuration
- play_arrow Class of Service Configuration
- play_arrow Security and Management Configuration
- play_arrow Routing Policies and Packet Filtering Configuration
  - Configuring Routing Policies (J-Web Procedure)
  - Configuring Firewall Filters (J-Web Procedure)
- play_arrow Ethernet Switching Configuration
- play_arrow Interfaces
- play_arrow Configuring Services
  - Configuring DHCP Services (J-Web Procedure)
  - Configuring SNMP (J-Web Procedure)
- play_arrow Configuring Layer 3 Protocols
- play_arrow Configuring Real-Time Performance Monitoring
  - Configuring Real-Time Performance Monitoring (J-Web Procedure)
  - Viewing Real-Time Performance Monitoring Information
- play_arrow Software Installation and Upgrades
  - Updating J-Web Interface on EX Series Switches (J-Web Procedure)
  - Upgrading Junos OS on EX Series Switches (J-Web Procedure)
- play_arrow Configuration, Files, Users, Licenses, and Product Registration
- play_arrow Virtual Chassis Configuration
  - Configuring a Virtual Chassis on an EX Series Switch (J-Web Procedure)
play_arrow Monitoring
- play_arrow Monitoring Tasks
play_arrow Administration
- play_arrow Software, Files, Licenses, Logs
play_arrow Troubleshooting
- play_arrow Troubleshooting Task
  - Troubleshooting Interface Configuration and Cable Faults
- play_arrow FAQ
  - J-Web Application Package for EX Series—Frequently Asked Questions

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English

Monitoring Hosts Using the J-Web Ping Host Tool

date_range 01-Apr-21

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Purpose

Note:

This topic applies only to the J-Web Application package.

Use the J-Web ping host tool to verify that the host can be reached over the network. The output is useful for diagnosing host and network connectivity problems. The switch sends a series of ICMP echo (ping) requests to a specified host and receives ICMP echo responses.

Action

To use the J-Web ping host tool:

Select Troubleshoot>Ping Host.
Next to Advanced options, click the expand icon.
Enter information into the Ping Host page, as described in Table 1.

The Remote Host field is the only required field.
Click Start.

The results of the ping operation are displayed in the main pane . If no options are specified, each ping response is in the following format:
```
                         bytes bytes from ip-address: icmp_seq=number ttl=number time=time                     
```
To stop the ping operation before it is complete, click OK.

Meaning

Table 1 lists the fields.

Table 1: J-Web Ping Host Field Summary
Field	Function	Your Action
Remote Host	Identifies the host to ping.	Type the hostname or IP address of the host to ping.
Advanced Options
Don't Resolve Addresses	Determines whether to display hostnames of the hops along the path.	To suppress the display of the hop hostnames, select the check box. To display the hop hostnames, clear the check box.
Interface	Specifies the interface on which the ping requests are sent.	Select the interface on which ping requests are sent from the list. If you select any, the ping requests are sent on all interfaces.
Count	Specifies the number of ping requests to send.	Select the number of ping requests to send from the list.
Don't Fragment	Specifies the Don't Fragment (DF) bit in the IP header of the ping request packet.	To set the DF bit, select the check box. To clear the DF bit, clear the check box.
Record Route	Sets the record route option in the IP header of the ping request packet. The path of the ping request packet is recorded within the packet and displayed in the main pane.	To record and display the path of the packet, select the check box. To suppress the recording and display of the path of the packet, clear the check box.
Type-of-Service	Specifies the type-of-service (TOS) value in the IP header of the ping request packet.	Select the decimal value of the TOS field from the list.
Routing Instance	Name of the routing instance for the ping attempt.	Select the routing instance name from the list.
Interval	Specifies the interval, in seconds, between transmissions of individual ping requests.	Select the interval from the list.
Packet Size	Specifies the size of the ping request packet.	Type the size, in bytes, of the packet. The size can be from 0 through 65468. The switch adds 8 bytes of ICMP header to the size.
Source Address	Specifies the source address of the ping request packet.	Type the source IP address.
Time-to-Live	Specifies the time-to-live (TTL) hop count for the ping request packet.	Select the TTL value from the list.
Bypass Routing	Determines whether ping requests are routed by means of the routing table. If the routing table is not used, ping requests are sent only to hosts on the interface specified in the Interface box. If the host is not on that interface, ping responses are not sent.	To bypass the routing table and send the ping requests to hosts on the specified interface only, select the check box. To route the ping requests using the routing table, clear the check box.

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