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8. Troubleshooting
9128-A2-GB20-80 September 2002
8-25
Connectivity
Connectivity is a proprietary method that determines whether the
FrameSaver
device at the other end of the frame relay PVC is active. This test stops
automatically and can only be executed for circuit multiplexed PVCs.
To run a connectivity test on a link:
Main Menu
→
Test
→
[Network PVC Tests/Data Port PVC Tests/
ISDN Call/PVC Tests]
Selecting Connectivity sends a frame to the
FrameSaver unit at the other end of
the PVC. A
RndTrip Time(ms)
message appears in the Result column when a
response is received within 5 seconds, indicating that the FrameSaver unit at the
remote end is alive (operational and connected), and the round trip (RT) time is
shown in milliseconds (ms), with a resolution of 1 ms. If a response is not received
within 5 seconds,
No Response
appears in the Result column.
Test Ca ll
Test Call tests the device’s ability to place a call. It allows an alternate means of
controlling the activation or deactivation of an ISDN link. This test only appears for
a FrameSaver device with a DBM that is configured to originate backup calls
(typically, the remote site) and has its ISDN Link Status option set to Auto.
To place a test call:
Main Menu
→
Test
→
ISDN Call/PVC Tests
When a test call is started,
Active
appears in the Status column. While the call is
Active, the status of the call connection and the link appears in the Results
column.
A
Frame Relay Link Up
message indicates that the required calls have
been made and the link is successfully passing LMI data.
A
Frame Relay Link Suboptimal
message indicates that at least one
call has been made on the link, the link is successfully passing LMI data, but
the Maximum Link Rate configured in the ISDN Link Profile has not been
achieved for the link.
A
Frame Relay Link Down
message indicates that the call attempts were
not successful.
NOTE:
Primary network data is not affected by a test call. If there is a network failure
while a test call is active, the test call is terminated and the call is automatically
converted to a backup call.