User manual

SM User Manual January 2004
Software Release 4.1
Figure 48: NAT Configuration screen, NAT without DHCP
ARP Cache Timeout
If a router upstream has an ARP cache of longer duration (as some use 30 minutes), then the
operator enters a value of longer duration than the router ARP cache. The default value of this field
is 20 seconds.
NAT Enable/Disable
The operator either disables NAT, or enables NAT to view additional options.
TCP Session Garbage Timeout
Where a large network exists behind the SM, the operator can set this value to lower than the
default value of 1440 minutes (24 hours). This action makes additional resources available for
greater traffic than the default value accommodates.
UDP Session Garbage Timeout
The operator may adjust this value in the range of 1 to 1440 minutes, based on network
performance. The default value of this parameter is 4 minutes.
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