Seems to also be available as a Debian package:

* https://packages.ubuntu.com/search?keywords=frr

in addition to a Snap:

* https://snapcraft.io/install/frr/ubuntu

Doing a quick test on 24.04: on a system without snapd installed, `apt install frr` installs packages and not any Snap stuff. Will have to see about 26.04 when I get a moment.

Thanks for digging in, as I mentioned earlier in this thread/another [lost track], I haven't messed with this in at least two LTS releases. Good to see it's aware at install time; this wasn't always the case.

How about the inverse, purging? At one point, removing Snap would lose BGP announcements [through the loss of the 'frr' software/service it was managing].

Anyway, I'm willing to believe most of my install/dependency-resolution pain was inspired by [and limited to] 18.04 or whatever was immediately after. We had a fleet of systems inadvertently moved to Snap, only learned through a loss of announcements on removal.

edit: Tested on a 24.04 box I had laying around; removing Snap does indeed still rip out things one might want:

    $ sudo apt purge snapd
    [...]
    Stopping snap.frr.ripngd.service
    Stopping unit snap.frr.ripngd.service
    [...]
    Stopping snap.frr.zebra.service