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Cisco Employee

no arp arpa interface command

When using the no arp arpa command on a interface, I assume the command disables the ablitiy to send arp requests, but does it also disable the ability to respond to arp requests?

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New Member

Re: no arp arpa interface command

From Cisco.com "IP Routing FAQ":

". By Advanced Research Projects Agency (ARPA) ARP, you mean "Ethernet interfaces" and, by default, ARP ARPA is set with no arp snap. This means that ARPA style ARPs are sent, but both ARPA and Subnetwork Access Protocol (SNAP) are answered. By setting no arp arpa, ARP requests are disabled, although null entries are created for every station to which an ARP request is attempted. You can enable SNAP alone, ARPA alone (the default), both SNAP and ARPA together (send two ARPs every time), or neither SNAP nor ARPA (which is what happens if you set no arp arpa without setting up any other ARP). "

From the above description it appears that the command only disables, outbound arpa arp requests, not inbound.

HTH,

Jason

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