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Chapter 21
Configuring Dynamic ARP Inspection
Command
Step 3
permit ip host sender-ip mac host sender-mac [log]
Step 4
exit
Step 5
ip arp inspection filter arp-acl-name vlan vlan-range
[static]
Step 6
interface interface-id
OL-8915-03
Purpose
Permit ARP packets from the specified host (Host 2).
For sender-ip, enter the IP address of Host 2.
•
For sender-mac, enter the MAC address of
•
Host 2.
(Optional) Specify log to log a packet in the log
•
buffer when it matches the access control entry
(ACE). Matches are logged if you also configure
the matchlog keyword in the ip arp inspection
vlan logging global configuration command. For
more information, see the
Buffer" section on page
Return to global configuration mode.
Apply the ARP ACL to the VLAN. By default, no
defined ARP ACLs are applied to any VLAN.
For arp-acl-name, specify the name of the ACL
•
created in Step 2.
•
For vlan-range, specify the VLAN that the
switches and hosts are in. You can specify a
single VLAN identified by VLAN ID number, a
range of VLANs separated by a hyphen, or a
series of VLANs separated by a comma. The
range is 1 to 4094.
(Optional) Specify static to treat implicit denies
•
in the ARP ACL as explicit denies and to drop
packets that do not match any previous clauses in
the ACL. DHCP bindings are not used.
If you do not specify this keyword, it means that
there is no explicit deny in the ACL that denies
the packet, and DHCP bindings determine
whether a packet is permitted or denied if the
packet does not match any clauses in the ACL.
ARP packets containing only IP-to-MAC address
bindings are compared against the ACL. Packets are
permitted only if the access list permits them.
Specify the Switch A interface that is connected to
Switch B, and enter interface configuration mode.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Configuring Dynamic ARP Inspection
"Configuring the Log
21-13.
21-9
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