Table 48: Denial of Service Configuration Fields (continued)
Field
Description
Port D-Disable
Enable this option to allow the system to diagnostically disable an interface if a
potential DoS attack has been detected on that interface. If an interface is
diagnostically disabled, it remains in the disabled state until an administrator
manually enables the interface.
Min TCP Hdr Size
The minimum TCP header size allowed. If First Fragment DoS prevention is
enabled, the device will drop packets that have a TCP header smaller than this
configured value.
ICMP Settings: These options help prevent the device and the network from attacks that involve issues with the
ICMP echo request packets (pings) that the device receives.
ICMP
Enable this option to allow the device to drop ICMP packets that have a type set
to ECHO_REQ (ping) and a payload size greater than the ICMP payload size
configured in the Max ICMPv4 Size or Max ICMPv6 Size fields.
ICMP Fragment
Enable this option to allow the device to drop fragmented ICMP packets.
Max ICMPv4 Size
The maximum allowed ICMPv4 packet size. If ICMP DoS prevention is enabled,
the device will drop ICMPv4 ping packets that have a size greater then this
configured maximum ICMPv4 packet size.
Max ICMPv6 Size
The maximum allowed IPv6 ICMP packet size. If ICMP DoS prevention is enabled,
the switch will drop IPv6 ICMP ping packets that have a size greater than this
configured maximum ICMPv6 packet size.
If you change any of the parameters, click
Submit
to apply the changes to the system. If you want the
switch to retain the new values across a power cycle, you must save the configuration.
Managing the DHCP Server
is generally used between clients (for example, hosts) and servers (for example, routers) for the
purpose of assigning IP addresses, gateways, and other networking definitions such as DNS, NTP,
and/or SIP parameters. The DHCP Server folder contains links to web pages that define and display
DHCP parameters and data.
Global Configuration
Use the Global Configuration page to configure global parameters for
.
To display this page, click
System
>
Advanced Configuration
>
DHCP Server
>
Global
in the
navigation menu.
Table 49: DHCP Server Global Configuration Fields
Field
Description
Admin Mode
Enables or disables the DHCP server administrative mode. When enabled, the device
can be configured to automatically allocate TCP/IP configurations for clients.
Conflict Logging Mode
Enables or disables the logging mode for IP address conflicts. When enabled, the
system stores information IP address conflicts that are detected by the DHCP server.
Configuring System Information
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