<div dir="ltr"><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 21 Sept 2021 at 15:34, Muenz, Michael <<a href="mailto:m.muenz@spam-fetish.org">m.muenz@spam-fetish.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
- Have only one area 0.0.0.0 also on the branches, so over 100 routers <br>
in one area<br>
- Have for each branch one area, so over 100 areas having only one router<br>
- Running external via BGP and having 100 neighbors with 100 private AS<br>
<br>
Anyone here experienced regarding scaling this size?<br></blockquote><div> </div><div>I can't comment on FRR specifically, but the last option is the general approach taken in the service provider world. Note; you can use the same ASN at each branch site with BGP Site of Origin + "allow-as in". Both of these BGP methods are very common in the SP world, and scale much higher than OSPF for this purpose (CE to PE connectivity). If the end site LANs ranges raley change then there is no more scalable option than static routes. If you can - go with static routes.<br></div><div><br></div><div>Cheers,</div><div>James.<br></div></div></div>