Limit on how many neighbors

[Clemens Schrimpe]

RIPNG/RIPv2 could carry a handful (or two :-) for your purposes. 

Clemens

--
Von einem Mobiltelefon gesendet. Bitte die Kürze entschuldigen.
Sent from a mobile phone. Please excuse brevity. 

> Am 14.10.2017 um 19:27 schrieb Magnus Löfqvist <ml at vmi.se>:
> 
> Hi again,
> 
> Just a throught, we dont need our endpoints to know about each other, in fact, we do firewalling not to allow traffic between them.
> 
> Are there any better solutions, instead of ospf, where we can have more than 100 endpoints getting there routes from a central server, and where we dont need to specify evry neigboor at the system?
> 
> / Magnus
> 
> Från: Magnus Löfqvist
> Sänt: 13 okt. 2017 23:31
> Till: Ondrej Zajicek
> Kopia: bird-users at network.cz 
> Ämne: Re: Limit on how many neighbors
> 
> Hi,
> 
> I agree with you, it should not be the case here.
> But,  we are running over mobile networks, and the openvpn adds some overhead.
> 
> Running some tcpdump shows that the packet lenght of the hello packet is just about 480, and that should be ok.
> 
> If we change to another openvpn instance/interface and change over to that it works directly.
> 
> I have also updated bird on our mainrouter to 1.6.3 (latest), but the issue still exist. 
> 
> I have attached our config files (bird.conf (mainrouter), bird_client.conf (from one of the end router)). 
> My OSPF knowlege are limited, so I guess that I have made some errors :)
> 
> The main feature we need is to distribute some external routes (10.3.50.0/24, 10.3.60.0/24), and distribute back the endpoints IP networks (10.98.x.x/30)
> 
> / Magnus
> 
> Från: Ondrej Zajicek <santiago at crfreenet.org>
> Sänt: 13 okt. 2017 13:13
> Till: Magnus Löfqvist
> Kopia: bird-users at network.cz 
> Ämne: Re: Limit on how many neighbors
> 
> On Thu, Oct 12, 2017 at 11:43:03AM +0000, Magnus Löfqvist wrote:
> > Hi,
> > 
> > We are running Bird with OSPF between embedded routers (openwrt) (mobile routers).
> > The routers are connected to our main server with openvpn, and we are using bird ontop on openvpn to deliver routes to the end routers.
> > 
> > This have worked quite well, but today we notice some glitches.
> > We had some routers that did not finish election (ie, stand in init instead of being full).
> > When we count, there are exactly 100 devices that are in "full", and 3 in init.
> > 
> > Are there any limit on how many neighbors/routers?
> 
> Hi
> 
> There is AFAIK no hard limit, but there is an issue that if you have too
> many neighbors, you end with Router-LSA that does not fit into MTU and
> will be sent using fragmented IP packets. Which usually works, but may be
> problematic. But that is probably not relevant, as if there were such
> problem, they would stuck in later stage of exchange and not in 'init'.
> 
> So i have no idea why they stuck in 'init'. Isn't there any
> misconfiguration? Is there anything in logs? Did they corrected after
> restart?
> 
> -- 
> Elen sila lumenn' omentielvo
> 
> Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
> OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
> "To err is human -- to blame it on a computer is even more so."
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