That's essentially what we got from them too. They said that this was fixed in 6.2 and later. There were two related bugs apparently.
Paolo, We can't use BGP. While we could in therory use BGP from the edge to the next hop router, what about the hop after that? And after that? We can't reasonably switch over to BGP for the entire network, so there has to be a demarcation of BGP/OSPF somewhere in the network. I'd like it to be on the edge as that's the only place we need BGP running. Thankfully we haven't seen any issues yet. I've been testing 6.7 on older MIPSBE boards (RB450G, RB493G, etc). Hopefully they'll remain stable. The bugs may be related to the newer boards (CCR, 2011, etc). I've thought about switching the edge to another vendor (Vyatta, or BSD), but that's a last resort and I'll only go there if necessary. I'm going to upgrade one edge router from 5.24 to 6.7 today and test it out. Let's hope I don't find any bugs. Thankfully it's a simple setup with a BGP default route + OSPF, no LCD, no MPLS, etc. Describe the OSPF poisoning your referring to. The issue we see is that over time OSPF doesn't always redistribute the default route learned by BGP. It works most of the time, but it's not always reliable. Cycling the BGP peer fixes it. Here's what Mikrotik wrote back about it: " Hello, v6.2 or newer. THere was actually two bugs for this problem one when OSPF was not redistributing BGP received default route. For this you need to upgrade BGP border routers that redistribute default route. Another problem was that default route was not installed on neighbors. For this you need to upgrade all ospf routers in backbone are that should receive default route. Regards, Maris " Brett Woollum Senior Sales Engineer [email protected] Tekify Broadband Internet Services Web: http://www.tekify.com Phone: 510-266-5800 , ext 6200 ----- Original Message ----- From: "Paul Hendry" <[email protected]> To: "Paolo Di Francesco" <[email protected]>, "Brett Woollum" <[email protected]>, "WISPA General List" <[email protected]> Sent: Sunday, January 26, 2014 3:23:26 AM Subject: Re: [WISPA] [Spam] Re: Mikrotik on Multi-core We also had issues with the routing package on v5.26. Mikrotik didn't want to know as we weren't running the "latest" release. Pointed out v5.26 was the latest to which they said "no, v6.7 is". V5 is unsupported even though it's still available on the website for download so bottom line, unless you are willing to beta test routerOS on your production network, you have no support. Nice. Many thanks, Paul. ----- Reply message ----- From: "Paolo Di Francesco" <[email protected]> To: "Brett Woollum" <[email protected]>, "WISPA General List" <[email protected]> Subject: [WISPA] [Spam] Re: Mikrotik on Multi-core Date: Sun, Jan 26, 2014 10:21 Hi Brett > Hi Paolo, > > It was pretty bad in early releases of 6, so I've stayed far from it. me too... :( (hey 6.x is still "beta" not stable) > I've recently found a serious issue with 5.26 where the default route > from BGP occasionally fails to be redistributed into OSPF, obviously > causing issues for the rest of the network. hum... I am running 5.26 on powerpc (OSPF + BGP) and I never had this issue but maybe it's because I have a different configuration Just an idea: for that specific link try to use ONLY BGP (i.e. eBGP + iBGP) so that you have the full route on the "second" layer routers and you can use whatever you want there the only issue that I see is: and if the "poisoning" is arriving from te OSPF core? Again I suggest you to use iBGP it will help a lot > Especially when it happens > on all of our edge routers at the same time. it's often the "poisoning" issue of OSPF :( > The solution from Mikrotik > Support was to use 6.2 or greater. > well I was using 6.x on my border and after some time the interfaces were disappearing, and doing strange things. I had to reboot and I do not like to reboot the edge... > I've been testing 6.7 on a RB450G and so far it's been working without > issues. I haven't tested BGP yet. > > Do you (or anyone) have any recommendations for/against using 6.7 on a > MIPSBE RouterBoard (not Power PC) for BGP with a default route, and > running OSPF? Nothing fancy, no filtering, etc. Any known stability > issues with this basic configuration on 6.7? > well I am still away from 6.x for its stability issues. On CCR 6.7 has some flapping issues with the interfaces, people report to turn on the LCD display to have better stability etc. So, maybe it's because CCR is a new product, but what I see is that 6.x is still out of control (well... the routeros in general is out of control) Another option: you could run your edge on openbsd, it works great (I used it for years). Not sure about the performances, I mean >1Gb traffic -- Ing. Paolo Di Francesco Level7 s.r.l. unipersonale Sede operativa: Largo Montalto, 5 - 90144 Palermo C.F. e P.IVA 05940050825 Fax : +39-091-8772072 assistenza: (+39) 091-8776432 web: http://www.level7.it _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
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