If a loopback test fails, digital sender or embedded LAN updates might be required, or the formatter might need to be replaced.
NOTE: If the digital sender fails before you open the Diagnostics menu item, remove the LAN cable, perform a cold reset on the digital sender, and then perform the loopback test.
Ping testPerform a ping test to check for network connectivity.
A ping test is designed to troubleshoot TCP/IP network connectivity issues by using key parts of the functionality from the ping utility on Microsoft Windows systems. All Jetdirect products can respond to ping requests, but the embedded LAN can initiate ping requests. All TCP/IP implementations, such as ICMP Echo Response, are required to respond to ping requests.
The following are the
●Destination IP address: The IP address that you want to contact
●Packet size: How many octets of data to send
●Timeout: The number of seconds to wait for a response
●Count: The number of packets to send
The following are the recommended settings for the ping test:
●Destination IP address: Use the local router and then use the remote nodes
●Packet size: 64 bytes and then 1,460 bytes
●Timeout: 1 second (more time if using a WAN connection)
●Count: 4Ping resultsThe following information is available from the ping test:
●Packets Sent: The total number of ICMP packets that were sent to the remote host during the test (or during the most recent test)
●Packets Received: The total number of ICMP packets that were received from the remote host during the test (or during the most recent test)
●Percent Lost: The percentage of ICMP packets that were sent but not received from the remote host during the test (or during the most recent test)
●RTT Min: The minimum time (in milliseconds) from when an ICMP packet is sent until it is returned from the remote host
●RTT Max: The maximum time (in milliseconds) from when an ICMP packet is sent until it is returned from the remote host
●RTT Average: The average time (in milliseconds) from when an ICMP packet is sent until it is returned from the remote host (total time/number of packets)
136 Chapter 6 Troubleshooting | ENWW |