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Sessions Timed Out is the number of NAT Sessions removed from the NAT hash database as
a result of a time limit being exceeded. This can occur in one of three ways:
a SYN packet in a session does not receive a response within the time limit defined
by the NAT variable "TCP SYN timeout period" (described earlier); these are tallied
in SYN Timeouts
1.
a FIN packet in a session does not receive a response within the time limit defined by
the NAT variable "TCP FIN timeout period" (described earlier); these are tallied in
FIN Timeouts
2.
the session has not been used for any IP address translations in the time limit defined
by either "UDP timeout period" or "TCP timeout period" (both described earlier);
these are tallied in Inactivity
3.
Currently, all non−TCP NAT Sessions use the NAT variable UDP timeout period for their
inactivity timeout limits.
The sum of the values for Currently Active, Properly Removed, and Sessions Timed Out
should be equal to the value for Total Sessions.
Sessions Reset tallies the NAT Sessions for which a RST packet was sent.
The Invalid Cache, No Resources, and Stale ACK values are not yet being used.
SHOW NAT ADDRESS_DB
The command show nat address_db shows the IP address database the NAT software is
using to do IP address translations. This display contains a lot of information that needs some
explanation.
Nat_2220> show nat address_db
Network Address Translation Address Database
Address Tree Level IP Address IP Mask Flags
−−−−−−−−−−−−−−−−−−− −−−−−−−−−−−−−−−−−− −−−−−−−−−− −−−−−−−−−−
+ 10.5.3.0 0xffffffe0 0x00000001
++ 10.5.3.1 0xffffffff 0x00010000
++ 10.5.3.11 0xffffffff 0x00000111
++ 10.5.3.20 0xffffffff 0x00000011
+ 198.41.9.192 0xffffffe0 0x00010000
++ 198.41.9.194 0xffffffff 0x00000012
++ 198.41.9.195 0xffffffff 0x00001112
++ 198.41.9.205 0xffffffff 0x00000004
++ 198.41.9.206 0xffffffff 0x00000004
++ 198.41.9.207 0xffffffff 0x00000004
++ 198.41.9.208 0xffffffff 0x00000004
++ 198.41.9.209 0xffffffff 0x00000004
++ 198.41.9.210 0xffffffff 0x00000004
++ 198.41.9.219 0xffffffff 0x00000002
Flag Legend: INTERNAL: 0x0001, MAPPED: 0x0002, PassThru: 0x0004
PORT in MAP_DB: 0x0010, 1 to 1: 0x0100, ROUTER IP PORT: 0x1000
PLACEHOLDER: 0x00010000
The above IP address database could better be viewed in a "tree form" such as:
Highest Level (+) Next Highest Level (++)
−−−−−−−−−−−−−−−−− −−−−−−−−−−−−−−−−−
10.5.3.0 (#) −−−−−−−−−+−−−−−−−−− 10.5.3.1($)
(255.255.255.224) |
+−−−−−−−−− 10.5.3.11(#)(%)()