Dynagen/Dynamips error: netio_desc_create_udp: unable to connect to

Posted by Blog - uTIcARdI on December 20, 2013
  • OS: CentOS 6.5 x86_64 installed on vmware
  • Dynamips 0.2.10

There is an error when loading a .net file named as test.net with 100 devices in Dynagen.0.11.0:

netio_desc_create_udp: unable to connect to

I searched on the Internet about this error msg, most of posts shared a method: specified udp port of dynamips instance in .net file. But it doesn’t works for me.

As I found a Dynagen description in GNS3 website: however Dynagen is still updated and developed for GNS3, this means you can download GNS3 sources, find Dynagen in it.

I downloaded it and found Dynagen version in the package is 0.13.1, newer than official one: 0.11.0; and the test.net can be loaded successfully:

chmod +x dynagen.py
./dynagen.py test.net

Dynagen/Dynamips error: netio_desc_create_udp: unable to connect to


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