Strongswan Install Error


Today I've updated my x86 to the lastest dev snapshot. Everything was fine except for strongswan installation.

root@Router-J1900:~# opkg install strongswan-full
Installing strongswan-full (5.7.1-1) to root...
Collected errors:
 * satisfy_dependencies_for: Cannot satisfy the following dependencies for strongswan-full:
 *      ip *
 * opkg_install_cmd: Cannot install package strongswan-full.

Any clue how to solve it?

Many Thanks,