Management and Configuration Guide K/KA/KB.15.15

NOTE: Link test and ping test—analysis tools in troubleshooting situations—are described in
Appendix C, “Troubleshooting” (page 368). See “Diagnostic tools” (page 426).
Compatibility mode
Table 21 (page 340) shows how the v2 zl and zl modules behave in various combinations and
situations when Compatibility mode is enabled and when it is disabled.
Table 21 Compatibility mode enabled/disabled comparisons
Compatibility mode disabledCompatibility mode enabledModules
v2 zl modules are at full capacity.Can insert zl module and the module will come
up. Any v2 zl modules are limited to the zl
configuration capacities.
v2 zl modules
only
ZL modules are not allowed to power up.
ZL modules are not allowed to power up.Can insert zl module and the module will come
up. Any v2 zl modules are limited to the zl
configuration capacities.
Mixed v2 zl
and zl
modules
If compatibility mode is disabled, the zl modules
go down.
The Management Module is the only module that
powers up.
Same as exists already.
If a v2 zl module is inserted, it operates in the
same mode as the zl module, but with performance
increases.
ZL modules
only
If Compatibility Mode is disabled and then enabled,
the startup config is erased and the chassis reboots.
In Compatibility Mode, no v2 zl features are
allowed, whether the modules are all v2 zl or not.
Port and trunk group statistics and flow control status
The features described in this section enable you to determine the traffic patterns for each port
since the last reboot or reset of the switch. You can display:
• A general report of traffic on all LAN ports and trunk groups in the switch, along with the
per-port flow control status (On or Off.)
• A detailed summary of traffic on a selected port or trunk group.
You can also reset the counters for a specific port.
The menu interface provides a dynamic display of counters summarizing the traffic on each port.
The CLI lets you see a static "snapshot" of port or trunk group statistics at a particular moment.
As mentioned above, rebooting or resetting the switch resets the counters to zero. You can also
reset the counters to zero for the current session. This is useful for troubleshooting. See the
(page 340), below.
NOTE: The Reset action resets the counter display to zero for the current session, but does not
affect the cumulative values in the actual hardware counters. (In compliance with the SNMP
standard, the values in the hardware counters are not reset to zero unless you reboot the switch.)
Exiting from the console session and starting a new session restores the counter displays to the
accumulated values in the hardware counters.
Traffic mirroring overview
Starting in software release K.12.xx, traffic mirroring (Intelligent Mirroring) allows you to mirror
(send a copy of) network traffic received or transmitted on a switch interface to a local or remote
destination, such as a traffic analyzer or IDS.)
340 Monitoring and Analyzing Switch Operation