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Telindus 1031 Router
Chapter 10
Reference manual
209
telindus1031/router/sendTtlExceeded
Use this attribute to enable or disable the sending of ICMP “TTL exceeded“
messages.
What is Time To Live (TTL)?
Each IP packet has a Time To Live (TTL) value in its header. Each device that sends an IP packet sets
this parameter at some fixed or predefined value. When the packet enters a router, the router decre-
ments the TTL value. If a router finds a value 0 after decrementing the TTL, it discards the packet. This
because a value 0 means the packet has passed too many routers. Probably the packet is looping
between a number of routers. This mechanism avoids that routers with configuration errors bring down
a complete network.
The ICMP message “TTL exceeded”
If a router discards a packet because its TTL is exceeded, it normally sends an ICMP “TTL exceeded“
message to the originator of the packet. With the
sendTtlExceeded
attribute you can define whether you
want the Telindus 1031 Router to send such ICMP messages or not.
The
sendTtlExceeded
attribute has the following values:
Value
Description
enabled
The Telindus 1031 Router sends ICMP “TTL exceeded" messages.
disabled
The Telindus 1031 Router does not send ICMP “TTL exceeded” messages.
This also implies that the router is not recognised by the UNIX or Windows trace-
route feature.
Default:enabled
Range: enabled / disabled
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 ...