LevelOne GEL-5261, User Manual

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Chapter 12
| Security Measures
ARP Inspection
Configuring
Interface Settings for
ARP Inspection
Use the Security > ARP Inspection (Configure Interface) page to specify the ports
that require ARP inspection, and to adjust the packet inspection rate. $$$
Parameters
These parameters are displayed:
◆ Interface – Port or trunk identifier.
◆ Trust Status – Configures the port as trusted or untrusted. (Default: Untrusted)
By default, all untrusted ports are subject to ARP packet rate limiting, and all
trusted ports are exempt from ARP packet rate limiting.
Packets arriving on trusted interfaces bypass all ARP Inspection and ARP
Inspection Validation checks and will always be forwarded, while those arriving
on untrusted interfaces are subject to all configured ARP inspection tests.
◆ Packet Rate Limit – Sets the maximum number of ARP packets that can be
processed by CPU per second on trusted or untrusted ports.
(Range: 0-2048; Default: 15)
Setting the rate limit to “0” means that there is no restriction on the number of
ARP packets that can be processed by the CPU.
The switch will drop all ARP packets received on a port which exceeds the
configured ARP-packets-per-second rate limit.
Web Interface
To configure interface settings for ARP Inspection:
1.
Click Security, ARP Inspection.
2.
Select Configure Interface from the Step list.
3.
Specify any untrusted ports which require ARP inspection, and adjust the
packet inspection rate.
4.
Click Apply.
Figure 205: Configuring Interface Settings for ARP Inspection