Thank you, you are helping me become a better Network Engineer. Just to confirm if I wanted to use BFD on my eBGP Upstream IP Transits I would have to get my Upstream IP Transit provider to enable it on their side too? I wonder if the Upstream providers would be open to configuring it (HE, Cogent, etc).
That is correct your upstream would have to enable it as well, though this is a fairly normal request for people that peer with each-other, most vendors support BFD, though there are some devices that don't have it so you would first have to check and then arrange with your upstream :)
I have been running BFD on my small network for awhile but recently after setting up a BGP signaled VPLS similar to in your videos I started running into issues with it and have come to learn BFD is actually officially considered broken by mikrotik since 2015 or maybe even before and they have no plans to fix until it is implemented again in version 7.
Really? Can you share the statement by MikroTik that BFD is not working on v6? I have BFD running on my BGP and OSPF networks and I have not run into issues that make it seem broken or causing issues. Although I do tweak some of the settings on BFD to be a bit more forgiving in the event of latency. If there are some issues you have with BFD I would like to try and replicate that and also warn people of that type of scenario. You do say that you are running this on your BGP signaled VPLS routers, not sure if this might have some impact as I have not used BFD on my provider network that is doing VPLS. So will check that out as well.
Out of interest I google'd a bit about Broken BFD and the forum post I can see dated from 2015 is regarding OSFP giving some issues for someone trying to use BFD with it. Not sure if this is the same article you are referencing, though the people in the article also verify BFD works fine with BGP. I would suggest if you are having issues with BFD that you are running on BGP to log a support call with MikroTik as well so that they can take a look at the issue. As I am curious about this now as well. forum.mikrotik.com/viewtopic.php?t=93775
@@TheNetworkBerg Hello and thank you for the quick reply. We saw this in our LAB yesterday where the BFD sessions for the BGP peers would only have 1 way packets. (this was multi hop) googling this lead me to several forum posts where people separately said Mikrotik support told them this was not working properly and would be fixed in ROS7. Even some people with larger OSPF networks said they have had issues with BFD causing flapping and had to remove it. I will see if I can dig these up for you later today. Currently I do run BFD in my small production network with OSPF and LDP signaled MPLS and it seems fine though.
:P Well that's the nice thing about BFD if you are peering with another vendor using different equipment you can still use it to help with convergence.
Hi there, I am trying to run BFD on lag interfaces from Mikrotik router to Cisco switch, but its flaps continuously. But when we have only one interface in the lag it works fine. The moment we add more interface in the lag issue starts.
@@TheNetworkBerg Thanks but there is ring topology where some devices aren't directly connected and some vendors have BFD for static routes for such scenarios. I just wanted to know if MikroTik has that feature too
