These exceptions cause the switch to reset itself. Each time an exception happens, a SYSLOG
message is also generated with the severity “Critical” . The message is saved in NVRAM and
can be seen using the show logging command. NVRAM can store up to 50 Critical/Serious
messages. If remote system logging is configured and enabled, the critical message can be
sent to a remote server.
You can display and clear the last software exceptions generated in the system using ACLI.
See
Software exception log using ACLI on page 34.
Note:
After an exception occurs and the switch resets itself, if there is another reset that occurs
before the next autosave, then the Critical message in the syslog may be lost.
Port mirroring
With the Port mirroring feature, also referred to as conversation steering, you can allocate a
single switch port (monitor port) as a traffic monitor for another switch port (mirror port). All
incoming and/or outgoing traffic on the mirrored port is copied to the monitor port. This feature
is helpful in network troubleshooting.
You can specify port-based monitoring for ingress and/or egress to a specific port. You can
also attach a probe device or equivalent, to the designated monitor port. When a port is
operating as a monitor port, forwarding is not allowed on that port.
Port mirroring configuration rules
The following configuration rules apply to the various port mirroring modes:
Port mirroring ingress mode (XRX or ->Port X)—In the Port mirroring ingress mode, packets
received on mirror port X are copied to the monitor port.
Standalone—On a standalone switch there is no limitation for ingress port mirroring.
Port mirroring egress mode (XTX or Port X ->)—In the Port mirroring egress mode, packets
transmitted on mirror port X are copied to the monitor port.
Standalone—On a standalone switch, there is no limitation for ingress port mirroring.
Port mirroring ingress and egress mode (XRX or XTX or <->Port X)—In the Port Mirroring
ingress and egress mode, packets that are either transmitted or received on mirror port X are
copied to the monitor port.
Standalone—On a standalone switch, there is no limitation for ingress port mirroring.
Port mirroring
Configuration — System Monitoring March 2013 21
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