JDS Uniphase SmartClass, User Manual

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Chapter 9 Troubleshooting
Resolving problems
68 SmartClass ADSL/Copper Tester User’s Guide
Verify the noise margin.
Run the copper cable check to look for metallic faults.
Issue
The ping menu says pings are being sent, but the network statistics are not
incrementing.
Resolution
The ping function only attempts to send a ping every second. Depending on
certain conditions, a physical ping packet may not be sent.
Check that the unit has not lost sync.
If the Ethernet interface is being used, make sure that the cabling is correct. If
the Ethernet cable is not hooked up, or is hooked up incorrectly, a packet will
not be sent. Thus the Ethernet statistics will not increment.
Verify the LAN IP address is not on the same subnet as the WAN IP or IP being
pinged.
Issue
I cannot connect using PPP.
Resolution
Verify that the VPI and VCI are correct.
Verify that the encapsulation is correct.
Verify that the addressing mode is set correctly (Dynamic/Static).
Verify that the username and password are correct.
Issue
I have a green Frame LED, but pings are not working.
Resolution
A green Frame LED does not guarantee a ping (or any routed/bridged packet)
will be treated properly once it leaves the unit. In an Ethernet bridged or IP over
ATM environment with static addressing, there is no initial communication with
the far end, so as soon as ATM sync occurs the interface is deemed active to
pass user data.
Make sure that the VPI and VCI is correct.
Make sure that the encapsulation is correct.
Try pinging a different host.
Make sure the DNS server is active with another PC.
Set the PING packet size to a lower number.
Make sure the ADSL/Copper Tester’s WAN mode is set correctly for the type
of circuit under test (such as PPPoE versus IPoE).