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Hi Seunghwan,<br>
<br>
Sorry for my late response (had two weeks of holiday).<br>
<br>
Your BFD protocol block doesn't mention any interfaces. The
documentation states (see
<a class="moz-txt-link-freetext" href="https://bird.network.cz/?get_doc&v=20&f=bird-6.html#ss6.2">https://bird.network.cz/?get_doc&v=20&f=bird-6.html#ss6.2</a>)
that shouldn't be needed however:<br>
<br>
<blockquote type="cite">Note that contrary to the behavior of
interface definitions of other protocols, BFD protocol would
accept sessions (in default configuration) even on interfaces not
covered by such definitions. </blockquote>
<br>
That would suggest your configuration is valid (as far as I can
tell) so you're either hitting a bug or I misinterpreted the
documentation.<br>
<br>
What you might do is adding the interfaces carrying the BGP packets
anyway. Feels a little like a workaround, but it might help you.<br>
<br>
Adding could be as simple as:<br>
<br>
<blockquote type="cite">protocol bfd {<br>
interface "eth0" {<br>
};<br>
}<br>
</blockquote>
<br>
(In this example your multihop configuration should be added again,
obviously.)<br>
<br>
Regards,<br>
Kees<br>
<br>
<div class="moz-cite-prefix">On 03-08-2020 03:56, seunghwan hwang
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEtHQByVbbt0P1cV97jX7e9d9fh0XcRP7+ZvRfBvoRppOLVeCg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hello K.
<div><br>
</div>
<div>Sorry, I'm late.</div>
<div>Here is my full configuration</div>
<div><br>
</div>
<div>
===================================================================</div>
<div><br>
</div>
<div>log "/var/log/bird/bird.log" { debug, trace, info, remote,
warning, error, auth, fatal, bug };<br>
debug protocols all;<br>
<br>
# Loopback IP<br>
router id [bird-server lo ip];<br>
<br>
<br>
protocol kernel {<br>
persist; # Don't remove routes on bird
shutdown<br>
scan time 20; # Scan kernel routing table
every 20 seconds<br>
import none; # Default is import all<br>
export all; # Default is export none<br>
merge paths on; # Enable ECMP Multi path.<br>
}<br>
<br>
protocol direct {<br>
interface "lo";<br>
}<br>
<br>
protocol device {<br>
scan time 10; # Scan interfaces every 10
seconds<br>
}<br>
<br>
protocol bfd {<br>
multihop {<br>
min rx interval 300 ms;<br>
min tx interval 300 ms;<br>
multiplier 3;<br>
};<br>
}<br>
<br>
protocol static {<br>
<br>
route [swich A router-id] via [interface IP to switch
A];<br>
route [swich B router-id] via [interface IP to switch
B]
;<br>
}<br>
<br>
# BGP Configuration<br>
protocol bgp as1 {<br>
import all;<br>
export all;<br>
<br>
# local Loopback IP<br>
# neighbor (tchy loopback ip)<br>
local [bird-server lo ip] as 65001;<br>
neighbor [swich A router-id] as 65001;<br>
hold time 30;<br>
enable route refresh off;<br>
bfd on;<br>
}<br>
<br>
protocol bgp as2 {<br>
import all;<br>
export all;<br>
<br>
local [bird-server lo ip]
as 65001;<br>
neighbor [swich B router-id]
as 65001;<br>
hold time 30;<br>
enable route refresh off;<br>
bfd on;<br>
}<br>
</div>
<div><br>
</div>
<div>=================================================================== <br>
<br>
</div>
<div>Please check it.</div>
<div><br>
</div>
<div>Regards.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">2020년 7월 29일 (수) 오후 4:46, Kees
Meijs | Nefos <<a href="mailto:kees@nefos.nl"
moz-do-not-send="true">kees@nefos.nl</a>>님이 작성:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
Yes we have; multiple times.<br>
<br>
Could you please provide a full configuration? (Feel free to
remove<br>
passwords and such, obviously.)<br>
<br>
Cheers,<br>
Kees<br>
<br>
On 29-07-2020 09:45, seunghwan hwang wrote:<br>
> Is not working.<br>
> Have you ever rebooted(# shutdown -r now) with your
settings?<br>
> Still, only the BGP is established and the BFD state
remains in Init.<br>
><br>
<br>
</blockquote>
</div>
</blockquote>
<br>
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