Comment 1 for bug 1410357

The description for the "ifenslave-2.6" package on Ubuntu is rather misleading.

"Description-en: transitional package, use "ifenslave"
This is a transitional package to aid migration to "ifenslave".
It can be safely removed from the system once nothing depends on it"

Hence, the instructions mention the "ifenslave" package which actually installs version 2.4.