[Xorp-users] Re: bgp

Dario Vieira Dario Vieira <dario.vieira@gmail.com>
Thu, 23 Jun 2005 15:16:17 +0200


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 Hi Atanu,
 Thanks for replying me.
 Here are my configuration files (in attachment) for each router "r" in my
topology.
 We didn't see any error from BGP itself! When a single destination prefix=
=20
"d" is announced, everything is okay. However, when the same prefix "d" is=
=20
withdrew, the problem takes place.

Thanks for your help.

Dario

On 6/22/05, Atanu Ghosh <atanu@icsi.berkeley.edu> wrote:=20
>=20
> From your output it looks as if the BGP process has terminated and the
> RIB has being notified. The RIB therefore attempts to remove the routes=
=20
> installed by BGP.
>=20
> Did you see any errors from BGP itself?
>=20
> I would like to try and reproduce the problem for the four router case,
> could you send the configuration files?
>=20
> Atanu.
>=20
> >>>>> "Dario" =3D=3D Dario VIEIRA < dario.vieira@int-evry.fr> writes:
>=20
> Dario> Hi, We tried to use the XORP 1.1, but we run into the same
> Dario> problem. :(
>=20
> Dario> Any help? It would be appreciated.=20
>=20
> Dario> Cheers,
>=20
> Dario> Dario
>=20
> Dario> Selon Dario VIEIRA <dario.vieira@int-evry.fr>:
>=20
> >> We are trying to perform some experiments with XORP BGP, but we=20
> >> are having some problems.
> >>
> >> In our network configurations, each AS consists of a single
> >> router. In addition, in each network configuration, there is an
> >> AS "X" that announces and later withdraws a single destination=20
> >> prefix "d".
> >>
> >> We have used some families of network topologies, as for
> >> instance, CLIQUE of size "n" (a network configuration that is
> >> made up of "n" ASes in a full mesh).=20
> >>
> >> We are using IMUNES in order to simulate our network. Besides, we
> >> are using XORP
> >> 1.0.
> >>
> >> We started our simulation with a CLIQUE of size 3. The simulation=20
> >> runs without any problem.
> >>
> >> However, for CLIQUE with size greater than 3, some XORP BGP peers
> >> crash when it is announced and later withdrew a destination
> >> prefix "d". We got the following message errors (for each bgp=20
> >> peer crashed):
> >>
> >> "[2005/06/21 16:32:04 INFO xorp_rip RIB] Received death event for
> >> protocol bgp shutting down---------- OriginTable: ebgp EGP Next
> >> table =3D Merged:(ebgp)+(ibgp)"=20
> >>
> >> Any idea about the origin of this problem?
> >>
> >> Thank for your help,
> >>
> >> Dario
> >>
> >>
> >> ----------------------------------------------------------------=20
> >> This message was sent using IMP, the Internet Messaging Program.
> >>
>=20
>=20
>=20
>=20
> Dario> ----------------------------------------------------------------
> Dario> This message was sent using IMP, the Internet Messaging=20
> Dario> Program. _______________________________________________
> Dario> Xorp-users mailing list Xorp-users@xorp.org
> Dario> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users<http:=
//mailman.icsi.berkeley.edu/mailman/listinfo/xorp-users>
>=20



--=20
Dario Vieira
dario.vieira@gmail.com
http://www-lor.int-evry.fr/~vieira_c

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<font face=3D"Courier New" size=3D"2">
<div>Hi Atanu,</div>
<div>&nbsp;</div>
<div>Thanks for replying me.</div>
<div>&nbsp;</div>
<div>Here are my configuration files (in attachment) for each router &quot;=
r&quot; in my</div>
<div>topology.</div>
<div>&nbsp;</div>
<div>We didn't see any error from BGP itself! When a single destination pre=
fix &quot;d&quot; is announced, everything is okay. However, when the same =
prefix &quot;d&quot; is withdrew, the problem takes place.</div>
<p>Thanks for your help.</p>
<p>Dario</p></font><br>
<div><span class=3D"gmail_quote">On 6/22/05, <b class=3D"gmail_sendername">=
Atanu Ghosh</b> &lt;<a href=3D"mailto:atanu@icsi.berkeley.edu">atanu@icsi.b=
erkeley.edu</a>&gt; wrote:</span>=20
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">From your output it looks as if =
the BGP process has terminated and the<br>RIB has being notified. The RIB t=
herefore attempts to remove the routes=20
<br>installed by BGP.<br><br>Did you see any errors from BGP itself?<br><br=
>I would like to try and reproduce the problem for the four router case,<br=
>could you send the configuration files?<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; Atanu.<br><br>&gt;&gt;&gt;&gt;&gt; &quot;Dario&quot; =3D=3D Dario=
 VIEIRA &lt;=20
<a href=3D"mailto:dario.vieira@int-evry.fr">dario.vieira@int-evry.fr</a>&gt=
; writes:<br><br>&nbsp;&nbsp; Dario&gt; Hi, We tried to use the XORP 1.1, b=
ut we run into the same<br>&nbsp;&nbsp; Dario&gt; problem. :(<br><br>&nbsp;=
&nbsp; Dario&gt; Any help? It would be appreciated.=20
<br><br>&nbsp;&nbsp; Dario&gt; Cheers,<br><br>&nbsp;&nbsp; Dario&gt; Dario<=
br><br>&nbsp;&nbsp; Dario&gt; Selon Dario VIEIRA &lt;<a href=3D"mailto:dari=
o.vieira@int-evry.fr">dario.vieira@int-evry.fr</a>&gt;:<br><br>&nbsp;&nbsp;=
 &gt;&gt; We are trying to perform some experiments with XORP BGP, but we=
=20
<br>&nbsp;&nbsp; &gt;&gt; are having some problems.<br>&nbsp;&nbsp; &gt;&gt=
;<br>&nbsp;&nbsp; &gt;&gt; In our network configurations, each AS consists =
of a single<br>&nbsp;&nbsp; &gt;&gt; router. In addition, in each network c=
onfiguration, there is an<br>&nbsp;&nbsp; &gt;&gt; AS &quot;X&quot; that an=
nounces and later withdraws a single destination=20
<br>&nbsp;&nbsp; &gt;&gt; prefix &quot;d&quot;.<br>&nbsp;&nbsp; &gt;&gt;<br=
>&nbsp;&nbsp; &gt;&gt; We have used some families of network topologies, as=
 for<br>&nbsp;&nbsp; &gt;&gt; instance, CLIQUE of size &quot;n&quot; (a net=
work configuration that is<br>&nbsp;&nbsp; &gt;&gt; made up of &quot;n&quot=
; ASes in a full mesh).=20
<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt; We are using IMUNES in o=
rder to simulate our network. Besides, we<br>&nbsp;&nbsp; &gt;&gt; are usin=
g XORP<br>&nbsp;&nbsp; &gt;&gt; 1.0.<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbs=
p; &gt;&gt; We started our simulation with a CLIQUE of size 3. The simulati=
on=20
<br>&nbsp;&nbsp; &gt;&gt; runs without any problem.<br>&nbsp;&nbsp; &gt;&gt=
;<br>&nbsp;&nbsp; &gt;&gt; However, for CLIQUE with size greater than 3, so=
me XORP BGP peers<br>&nbsp;&nbsp; &gt;&gt; crash when it is announced and l=
ater withdrew a destination<br>&nbsp;&nbsp; &gt;&gt; prefix &quot;d&quot;. =
We got the following message errors (for each bgp=20
<br>&nbsp;&nbsp; &gt;&gt; peer crashed):<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;=
&nbsp; &gt;&gt; &quot;[2005/06/21 16:32:04 INFO xorp_rip RIB] Received deat=
h event for<br>&nbsp;&nbsp; &gt;&gt; protocol bgp shutting down---------- O=
riginTable: ebgp EGP Next<br>&nbsp;&nbsp; &gt;&gt; table =3D Merged:(ebgp)+=
(ibgp)&quot;=20
<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt; Any idea about the origi=
n of this problem?<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt; Thank =
for your help,<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt; Dario<br>&=
nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt;<br>&nbsp;&nbsp; &gt;&gt; ----=
------------------------------------------------------------=20
<br>&nbsp;&nbsp; &gt;&gt; This message was sent using IMP, the Internet Mes=
saging Program.<br>&nbsp;&nbsp; &gt;&gt;<br><br><br><br><br>&nbsp;&nbsp; Da=
rio&gt; ----------------------------------------------------------------<br=
>&nbsp;&nbsp; Dario&gt; This message was sent using IMP, the Internet Messa=
ging=20
<br>&nbsp;&nbsp; Dario&gt; Program.&nbsp;&nbsp;____________________________=
___________________<br>&nbsp;&nbsp; Dario&gt; Xorp-users mailing list <a hr=
ef=3D"mailto:Xorp-users@xorp.org">Xorp-users@xorp.org</a><br>&nbsp;&nbsp; D=
ario&gt; <a href=3D"http://mailman.icsi.berkeley.edu/mailman/listinfo/xorp-=
users">
http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users</a><br></block=
quote></div><br><br><br>-- <br>Dario Vieira<br><a href=3D"mailto:dario.viei=
ra@gmail.com">dario.vieira@gmail.com</a><br><a href=3D"http://www-lor.int-e=
vry.fr/~vieira_c">
http://www-lor.int-evry.fr/~vieira_c</a>=20

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