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IP Forwarding Configuring IP
page 14-12 OmniSwitch 6600 Family Network Configuration Guide April 2006
• An IP mask (e.g. 255.0.0.0) used to identify which part of the ARP packet IP address is compared to
the filter IP address.
• An optional VLAN ID to specify that the filter is only applied to ARP packets from that VLAN.
• Which ARP packet IP address to use for filtering (sender or target). If the target IP address in the ARP
packet matches a target IP specified in a filter, then the disposition for that filter applies to the ARP
packet. If the sender IP address in the ARP packet matches a sender IP specified in a filter, then the
disposition for that filter applies to the ARP packet.
• The filter disposition (block or allow). If an ARP packet meets filter criteria, the switch is either
blocked from responding to the packet or allowed to respond to the packet depending on the filter
disposition. Packets that do not meet any filter criteria are responded to by the switch.
The following arp filter command example creates an ARP filter will block the switch from responding to
ARP packets that contain a sender IP address that starts with 198:
-> arp filter 198.0.0.0 mask 255.0.0.0 sender block
Up to 200 ARP filters can be defined on a single switch. To remove an individual filter, use the no form of
the arp filter command. For example:
-> no arp filter 198.0.0.0
To clear all ARP filters from the switch configuration, use the clear arp filter command. For example:
-> clear arp filter
Use the show arp filter command to verify the ARP filter configuration. For more information about this
and other ARP filter commands, see the OmniSwitch CLI Reference Guide.