Any chance of existing the resource of FRR in RouterOS and I’m being the dummy that did not found how?
My major objective is a simple ultra fast convergency using BFD FRR and OSPF.
Yep, the time of recalculation of the routes afects more then expected.
Beyond de 1.5 seconds until BFD trigger the new convergency, with not much routes (200) with OSFP, it takes about more 1-1.5 to complete de route calculations and put it on fib again.
P.S.: It could be with ISIS also. BGP… I’m available to try…
MPLS is also on the near future expectations.
But is understandable that OPAQUE labels FRR could be more complex and come a little later.
Hi.
Been dealing with this exact issue for a while.
To the best of my knowledge, there is no LFA FRR in ROS, but I’ve found a rather decent workaround that does it for me (and maybe would do for you too):
Just set up two OSPF instances, one for main links, one for backup ones. Set backup instance cost higher, and also add an input filter rule that would convert OSPF cost into RIB distance. Enable BFD on main (or both) instances.
I did consider that possibility.
And it's quite reasonable if you're working with a lean IGP and iBGP environment.
But one factor I didn't mention is that in the scenario I'm working with, there's a significant number of CRS504-4XQ-IN and CRS326-24S+2Q+RM devices, which have 650MHz MIPSBE processors, and little RAM.
So doubling the IGP in this case would cost me more than double the resources in CPU and RAM.
I'll still keep this hypothesis in my workarounds notebook.
But for this case, I don't think it will fit.
Wow, 64mb of RAM sure is tight. I can’t really comment on performance impact since I’m running that on 4011, where the impact is below visible threshold.
But what I can tell with certainty - it does address convergence issue pretty well.
Also, that 2nd instance is only required for nodes with alternative path.