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Telindus 1031 Router
Chapter 12
Reference manual
315
12.4.2 Default NAT performance attributes
telindus1031/router/defaultNat/socketsFree
This attribute shows the remaining number of new connections (i.e. sockets) that can be initiated. A
socket is a set of source and destination IP addresses and port numbers.
Initially, 2048 simultaneous sockets can be initiated. Sockets are freed using a garbage mechanism.
This means that every five minutes all sockets are checked. If a socket has been released by PAT or
NAT, then this socket is returned to the pool of free sockets.
ICMP and UDP sockets are released when they have no data traffic during five minutes. TCP sockets
are released after the TCP session has been closed or when the session has been idle for 24 hours.
telindus1031/router/defaultNat/allocFails
If no sockets are available anymore but an attempt to set up a new connection is being made, then the
natAllocFails
attribute value is incremented by 1.
Because the sockets are distributed using a hashing function, it is possible that
natAllocFails
increases
even though
natSocketsFree
still indicates free sockets.
ICMP requires a new socket for each transmitted packet. This implies that, for instance, a permanent
ping or trace-route command may eventually use all free sockets.
telindus1031/router/defaultNat/discards
This attribute indicates how many times a packet has been discarded for reasons other than a lack of
free sockets. This could be, for instance, because an attempt was made to connect from the Internet to
a service that was not present in the
servicesAvailable
table.
telindus1031/router/defaultNat/addressesAvailable
This attribute displays the number of NAT addresses that are currently free.
telindus1031/router/defaultNat/tcpSocketsUsed
This attribute displays the number of sockets currently in use by PAT and NAT for TCP applications.
telindus1031/router/defaultNat/udpSocketsUsed
This attribute displays the number of sockets currently in use by PAT and NAT for UDP applications.
telindus1031/router/defaultNat/icmpSocketsUsed
This attribute displays the number of sockets currently in use by PAT and NAT for ICMP applications.
Summary of Contents for 1031
Page 11: ...Telindus 1031 Router User manual 1 User manual ...
Page 12: ...Telindus 1031 Router User manual 2 ...
Page 80: ...Telindus 1031 Router Chapter 5 User manual Basic configuration 70 ...
Page 168: ...Telindus 1031 Router Chapter 8 User manual Configuring the bridge 158 ...
Page 179: ...Telindus 1031 Router Reference manual 169 Reference manual ...
Page 180: ...Telindus 1031 Router Reference manual 170 ...
Page 308: ...Telindus 1031 Router Chapter 11 Reference manual Status attributes 298 ...
Page 336: ...Telindus 1031 Router Chapter 12 Reference manual Performance attributes 326 ...
Page 348: ...Telindus 1031 Router Chapter 13 Reference manual Alarm attributes 338 ...
Page 362: ...Telindus 1031 Router Chapter 15 Reference manual Auto installing the Telindus 1031 Router 352 ...
Page 370: ...Telindus 1031 Router Chapter 16 Reference manual Downloading software 360 ...
Page 380: ...Telindus 1031 Router Chapter 17 Reference manual Technical specifications 370 ...
Page 381: ...Telindus 1031 Router Annex 371 Annex ...
Page 382: ...Telindus 1031 Router Annex 372 ...
Page 384: ...Telindus 1031 Router Annex A Annex common TCP and UDP numbers 374 ...
Page 386: ...Telindus 1031 Router Annex B Annex product information 376 ...