Edge-Core ES3528MV2 Management Manual page 374

| Security Measures
C 13
HAPTER
ARP Inspection
ARP Inspection Logging
By default, logging is active for ARP Inspection, and cannot be disabled.
◆
The administrator can configure the log facility rate.
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When the switch drops a packet, it places an entry in the log buffer,
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then generates a system message on a rate-controlled basis. After the
system message is generated, the entry is cleared from the log buffer.
Each log entry contains flow information, such as the receiving VLAN,
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the port number, the source and destination IP addresses, and the
source and destination MAC addresses.
If multiple, identical invalid ARP packets are received consecutively on
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the same VLAN, then the logging facility will only generate one entry in
the log buffer and one corresponding system message.
If the log buffer is full, the oldest entry will be replaced with the newest
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entry.
P
ARAMETERS
These parameters are displayed:
◆ ARP Inspection Status – Enables ARP Inspection globally.
(Default: Disabled)
ARP Inspection Validation – Enables extended ARP Inspection
◆
Validation if any of the following options are enabled.
(Default: Disabled)
Dst-MAC – Validates the destination MAC address in the Ethernet
■
header against the target MAC address in the body of ARP
responses.
IP – Checks the ARP body for invalid and unexpected IP addresses.
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Sender IP addresses are checked in all ARP requests and responses,
while target IP addresses are checked only in ARP responses.
Allow Zeros – Allows sender IP address to be 0.0.0.0.
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Src-MAC – Validates the source MAC address in the Ethernet
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header against the sender MAC address in the ARP body. This check
is performed on both ARP requests and responses.
Log Message Number – The maximum number of entries saved in a
◆
log message. (Range: 0-256; Default: 5)
◆ Log Interval – The interval at which log messages are sent.
(Range: 0-86400 seconds; Default: 1 second)
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