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264
30.4 CPU Protection Configuration
Use this screen to limit the maximum number of control packets (ARP, BPDU and/or IGMP) that the
Switch can receive or transmit on a port. Click the Click Here link next to CPU protection in the
Advanced Application > Errdisable screen to display the screen as shown.
Note: After you configure this screen, make sure you also enable error detection for the
specific control packets in the Advanced Application > Errdisable > Errdisable
Detect screen.
Mode This field shows the action that the Switch takes for the cause.
• inactive-port - The Switch disables the port.
• inactive-reason - The Switch drops all the specified control packets (such as BPDU) on
the port.
• rate-limitation - The Switch drops the additional control packets the port(s) has to
handle in every one second.
Rate This field displays how many control packets this port can receive or transmit per second. It
can be adjusted in CPU Protection. 0 means no rate limit.
Status This field displays the errdisable status
• Forwarding: The Switch is forwarding packets. Rate-limitation mode is always in
Forwarding status.
• Err-disable: The Switch disables the port on which the control packets are received
(inactive-port) or drops specified control packets on the port (inactive-reason)
Recovery
Time Left
This field displays the time (seconds) left before the port(s) becomes active of Errdisable
Recovery.
Total
Dropped
This field displays the total packet number dropped by this port where the packet rate
exceeds the rate of mode rate-limitation.
Table 121 Advanced Application > Errdisable > Errdisable Status (continued)
LABEL DESCRIPTION
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