Specifications

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0XO(15.1(1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ip arp inspection log-buffer
ip arp inspecti on log-buffer
To configure the parameters that are associated with the logging buffer, use the ip arp inspection
log-buffer command. To disable the parameters, use the no form of this command.
ip arp inspection log-buffer {entries number | logs numb er inter val seconds}
no ip arp inspection log-buffer {entries | logs}
Syntax Description
Defaults W hen dynamic ARP inspec tion is enabled, denied, or dropped, the ARP packets are lo gged.
The number of entries is set to 32.
The number of logging entries is limited to 5 per second.
The interval is set to 1.
Command Modes Global c onfiguratio n mode
Usage Guidelines T he first dropped packe t of a given flow is logged immedia tely. The subsequent packets f or the same
flow are registered but are not logged immediately. Register ing these packets is done in a log buffer that
is shared by all the VLANs. Entries from this buffer are logged on a rate-controlled basis.
Examples This exampl e shows how to configure the logg ing buffer to hold up to 45 entries :
Switch# config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ip arp inspection log-buffer entries 45
Switch(config)# end
Switch# show ip arp inspection log
Total Log Buffer Size : 45
Syslog rate : 5 entries per 1 seconds.
No entries in log buffer.
Switch#
This example shows how to configure t he logging rate to 10 logs per 3 sec onds:
Switch(config)# ip arp inspection log-buffer logs 10 interval 3
Switch(config)# end
Switch# show ip arp inspection log
Total Log Buffer Size : 45
Syslog rate : 10 entries per 3 seconds.
No entries in log buffer.
Switch#
entries number Number of entries from the logging buffer; the range is from 0 to 1024.
logs number Number of entr ies to be logged in an interval; the range is from 0 to 1024. A
0 value indicates that entries should no t be logged out of this buffer.
interval seconds Logging rate; the ran ge is from 0 to 86400 (1 day). A 0 value indic ates an
immediate log.