Error Disable And Recovery Commands - ZyXEL Communications XS3800-28 Cli Reference Manual

Error Disable and Recovery
Use these commands to configure the CPU protection and error disable recovery features on the
Switch.
26.1 CPU Protection Overview
Switches exchange protocol control packets in a network to get the latest networking information. If a
Switch receives large numbers of control packets, such as ARP, BPDU or IGMP packets, which are to be
processed by the CPU, the CPU may become overloaded and be unable to handle regular tasks
properly.
The CPU protection feature allows you to limit the rate of ARP, BPDU and IGMP packets to be delivered
to the CPU on a port. This enhances the CPU efficiency and protects against potential DoS attacks or
errors from other network(s). You then can choose to drop control packets that exceed the specified
rate limit or disable a port on which the packets are received.
26.2 Error-Disable Recovery Overview
Some features, such as loop guard or CPU protection, allow the Switch to shut down a port or discard
specific packets on a port when an error is detected on the port. For example, if the Switch detects that
packets sent out the port(s) loop back to the Switch, the Switch can shut down the port(s)
automatically. After that, you need to enable the port(s) or allow the packets on a port manually via the
web configurator or the commands. With error-disable recovery, you can set the disabled port(s) to
become active or start receiving the packets again after the time interval you specify.
26.3 User Input Values
This section lists the common term definition appears in this chapter.
Table 73 errdisable recovery command user input values
USER INPUT
port-list
DESCRIPTION
The port number or a range of port numbers that you want to configure.
Ethernet Switch CLI Reference Guide
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H A P T E R
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