3D Connexion 17621 setup guide Show NAT Addressdb

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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:

1.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

2.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

3.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

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(#)(%)()

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Contents Contents − Network Address Translation Configuration Guide Final Notes Important Disclaimers NAT Functionality Local Network SecurityExample ONE AN Example NAT Session Condition Page Condition 1 a NAT Session Initiated from the Outside Example TWO Pinging the NAT Router ConditionPage Example Three Pinging the Macintosh AT 198.41.9.210 ConditionPage Concluding Explanation Remarks Console Commands for the NAT Software Show NATShow NAT Config Line−by−line description of this display follows TCP SYN timeout period sec Show NAT Sessions Show NAT MAPShow NAT Statistics Show NAT Addressdb NAT Global Page RespondICMP NAT interface responses to Icmp packets NAT Mapping IP Section ID Port Configuration for NAT for Example ONE External NAT PORT, Example Internal NAT PORT, Example IP Section ID Port Configuration for NAT for Example ThreeHere is the configuration of the IP ports Entered External range Currently Supported IP Applications NAT Passthru RANGE, ExampleFinal Notes Updated Aug 19 Document ID

17621 specifications

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