ARP cache
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... remote machine, it can add that machine to the list of
machines that understand trailers, e.g., by marking the
corresponding entry in the ARP cache.
...
... ARP Cache Validation ...
... call the link-layer advice routine to invalidate
the ARP cache entry.
...
...
Approaches (1) and (2) involve ARP cache timeouts on
the order of a minute or less. In the absence of proxy
...
... Destination Unreachable error to
IP solely because there is no ARP cache entry for a destination.
...
... |2.3.1 | | | | |x|
ARP |2.3.2 | | | | | |
Flush out-of-date ARP cache entries |2.3.2.1|x| | | | |
Prevent ARP floods |2.3.2.1|x| | | | |
...
... TOS to link layer |2.4 |x| | | | |
No ARP cache entry treated as Dest. Unreach. |2.4 | | | | |x|
...