<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Michael, <br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Apr 15, 2024, at 16:16, Michael DiDomenico <mdidomenico4@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><div dir="ltr"><div class="gmail_default" style="font-family:monospace;font-size:large">i'm new to frr and ospf, so this might sound like a simple question. i have a network of clients separated from the rest of a much larger network by four gateways</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">pseudo code follows...<br></div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">when i config ospf on the gateways<br></div><div class="gmail_default" style="font-family:monospace;font-size:large">router ospf</div><div class="gmail_default" style="font-family:monospace;font-size:large"> router id 1</div><div class="gmail_default" style="font-family:monospace;font-size:large"> network <a href="http://10.0.1.0/24">10.0.1.0/24</a> area 0</div><div class="gmail_default" style="font-family:monospace;font-size:large"> network <a href="http://10.0.2.0/24">10.0.2.0/24</a> area 1</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">and then on the clients</div><div class="gmail_default" style="font-family:monospace;font-size:large">router ospf<br></div><div class="gmail_default" style="font-family:monospace;font-size:large"> router id 100</div><div class="gmail_default" style="font-family:monospace;font-size:large"> network <a href="http://10.0.2.0/24">10.0.2.0/24</a> area 1</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">all the routing seems to work find and all the hosts on various networks can see each other. however, what i can't seem to figure out is how i can distribute a default route</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">on linux i would do something like</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">ip route add default nexthop 10.0.2.1 nexthop 10.0.2.2 nexthop 10.0.2.3 nexthop 10.0.2.4</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">and that works in this instance too, in that the packets will flow over the four gateway machines, however if one of the gateways goes down the route table doesn't get updated since i statically defined the default route</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">what i want to do is advertise a default route to all the clients in area 1 only. i can't seem to figure out a combination of redistribute/route-maps/acl's and i haven't been able to locate a clear example on the internet.</div><div class="gmail_default" style="font-family:monospace;font-size:large"><br></div><div class="gmail_default" style="font-family:monospace;font-size:large">can anyone lend a hand?<br></div></div></div></blockquote><div><br></div><div>Given that the originated default route is advertised as a OSPF AS External LSA (advertised to all non-stub, NSSA areas), you can’t limit the advertisement to area 1 unless it is an NSSA. In the case of an NSSA area, you’d use:</div><div><br></div><div><br></div><div><br></div><div><br></div><br><blockquote type="cite"><div>
_______________________________________________<br>frog mailing list<br>frog@lists.frrouting.org<br>https://lists.frrouting.org/listinfo/frog<br></div></blockquote></div><br></body></html>