4
4-28
Monitoring and Managing the Switch
The switch transmits a link reset to initiate the link reset protocol
or recover from a link timeout. This occurs normally to establish
BB_Credit or recover lost BB_Credit. The switch receives a link
reset from an attached device if the device wishes to initiate the
link reset or recover from a link timeout.
There are no thresholds for these values. You can determine that a
problem exists by the rate that the value changes. BB_Credit
starvation can occur if data is sent to a device faster than the
device can process the frames. Such a suituation can back up into
ISLs, degrading performance.
Error Statistics
Error statistics show whether or not a port is operating correctly. Use
this data to isolate problems with port and link operations:
◆
Link failures
— The number of link failures. A link failure is
recorded in response to a not operational sequence (NOS),
protocol timeout, or port failure. A yellow triangle appears in the
Hardware view to indicate a link incident. A red and yellow
diamond appears to indicate a port failure.
◆
Sync losses
— The number of loss-of-synchronization errors,
which occur if the attached device is reset or disconnected from
the port. A yellow triangle appears in the Hardware view to
indicate a link incident.
◆
Signal losses
— The number of loss-of-signal errors, which occur
if the attached device is reset or disconnected from the port. A
yellow triangle appears in the Hardware view to indicate a link
incident.
◆
Primitive sequence errors
— The number of primitive sequence
protocol errors. A yellow triangle appears in the Hardware view
to indicate a link incident.
◆
Discarded frames
— The total number of frames discarded. A
received frame cannot be routed and is discarded if the frame
times out (insufficient buffer-to-buffer credit) or the destination
device is not logged in to the switch.
◆
Invalid transmission words
— The number of times that the
switch detected invalid transmission words from the attached
device. This indicates that a frame or primitive sequence arrived
at the switch’s port corrupted. This corruption can be due to the
attached device performing a reset, plugging or unplugging the
Summary of Contents for Connectrix DS-32M2
Page 4: ...Connectrix DS 32M2 User Guide iv ...
Page 14: ...xiv Connectrix DS 32M2 User Guide Figures ...
Page 16: ...Connectrix DS 32M2 User Guide Tables xvi ...
Page 24: ...xxiv Connectrix DS 32M2 User Guide Warnings and Cautions ...
Page 42: ...1 1 18 Connectrix DS 32M2 User Guide Switch Operating Features ...
Page 72: ...3 3 24 Connectrix DS 32M2 User Guide Product Manager Overview ...
Page 226: ...B B 8 Connectrix DS 32M2 User Guide Configuring Network Addresses ...
Page 248: ...C C 22 Connectrix DS 32M2 User Guide Configuring the Switch from a Web Server ...
Page 332: ...F F 8 Connectrix DS 32M2 User Guide Customer Support ...
Page 351: ...Connectrix DS 32M2 User Guide g 19 Glossary ...
Page 352: ...g 20 Connectrix DS 32M2 User Guide Glossary ...