We have internet connections from different isps that we are trying to bond togetther. We do not control both ends so we are looking at doing tunneling back to either a mikrotik or another type of box. What tunneling protocol do you guys recommend for me that will be bondable. WE are looking at either l2tp or pptp to be able to bond between a mikrotik and either a cisco router or a linuxbox.

Bump

I wouldn't recommend that at all. If you're going across multiple ISPs you're likely to introduce packet re-ordering, which severely affects TCP connections.

I'd just use PCC.

Ok then how would I do it so that I can configure PCC to route traffic over the least busy connection?

You don't. PCC doesn't work that way. Neither does bonding, though. TE (traffic engineering) fits that description, but that's an entirely different and FAR more complex beast.

http://wiki.mikrotik.com/wiki/Manual:PCC

Have a read thru that