3Com 4007 Command Reference Manual page 259

Field
inRequests
outIfdown
outMemErrors
outReplies
outRequests
Description
ARP request frames that were received on an IP
interface
Failure of the module to send one of the following
three frames because the state of the IP interface
was down:
ARP request
ARP reply
IP frame to be forwarded (pending ARP
resolution)
Failure of the module to allocate memory to
transmit either an ARP request or an ARP reply
ARP replies that were transmitted from an IP
interface
ARP requests that were transmitted from an IP
interface
259