<div dir="ltr"><div dir="auto"><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 7 Jan 2020, 00:39 Ondrej Zajicek, <<a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Mon, Jan 06, 2020 at 06:25:30PM +0000, Neil Jerram wrote:<br>
> On Sun, Dec 22, 2019 at 3:03 PM Ondrej Zajicek <<a href="mailto:santiago@crfreenet.org" rel="noreferrer" target="_blank">santiago@crfreenet.org</a>><br>
> wrote:<br>
> <br>
> > On Sat, Dec 21, 2019 at 12:39:43AM +0100, Nico Schottelius wrote:<br>
> > > I have had a look at OSPF, but for our relatively simple network it<br>
> > > looks like an overkill. Do you have any other recommendations for<br>
> > > what to run the IGP with instead?<br>
> > ><br>
> > > The main reason I so far tried to stay on iBGP only is to reduce<br>
> > > complexity.<br>
> ><br>
> > Well, you can run just IBGP, if you use direct + 'next hop self' options,<br>
> > which should be OK in your simple topology.<br>
> ><br>
> <br>
> According to my understanding of the BIRD code, 'next hop self' is only<br>
> relevant when exporting a locally originated route to a BGP peer. So,<br>
> assuming the original question was about what happens on R1 and R2, I would<br>
> not expect it to be relevant at all. Is that right?<br>
<br>
Option 'next hop self' is relevant in both exporting locally originated<br>
route to a BGP (i.e. a route without existing bgp_next_hop attribute) and<br>
exporting route from BGP to another BGP (i.e. a route with existing<br>
bgp_next_hop attribute).<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Thanks, yes, I should have mentioned the second case too.</div><div dir="auto"><br></div><div dir="auto">But both cases are on export, so I think my point still stands that 'next hop self' is not relevant to the question that began this thread. (Unless I misunderstood that question.)</div><div dir="auto"><br></div><div dir="auto">Best wishes,</div><div dir="auto"> Neil</div><div dir="auto"><br></div></div>
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