Christian, The terminology I used was incorrect. What I meant to say was: "it appears that AS1853 is announcing a default route (to the Looking Glass at VIX -> at least)." I was merely seeking an explanation and wandering if this is what was really intended, not knowing myself exactly what was intended by this announce. Regards, -Donner p.s. Paul - if you want to forward this to NANOG for me... At 06:14 PM 5/6/98 MET, Christian Panigl, ACOnet/UniVie wrote:

...

Date: Wed, 06 May 1998 11:50:55 -0400 From: Paul Ferguson <ferguson@cisco.com>

Hi Paul,

and whoever might have gotten nervous about our (AS1853) "default-route":

please calm down, there is no such beast, and we have never announced a default-route "at the Vienna Internet eXchange" (http://www.vix.at/). Please read below my answer/explanation to Paul Donner, the rumour is based on a misinterpretation ...

As I'm not subscriber to the NANOG list, my CC to this list will most probably bounce back, therefore, Paul, please forward my answer there !!!

Regards CP

======================================= Date: Wed, 06 May 1998 13:23:32 MET-DST From: "Christian Panigl, ACOnet/UniVie" <panigl@cc.univie.ac.at> To: pdonner@cisco.com CC: helpdesk@aco.net, panigl@cc.univie.ac.at Subject: VIX Looking Glass

...

Date: Wed, 06 May 1998 04:32:14 -0400 From: "Paul G. Donner" <pdonner@cisco.com> To: helpdesk@aco.net

You guys are annoucing a default route at VIX. Is this what you really want to be doing? I found this while using LOOKING GLASS. For example, I was looking for a route to block 209.58.48.0/20. Now AS1583 does not advertise a route for this block but they do offer to route any traffic that is destined for this block. So you will be blackholing traffic destined for this site from any of your peers.

Dear Paul Donner,

thanks for your hint. However, we are NOT announcing a default route "at VIX". AS1853 (ACOnet Backbone) is announcing a default route to AS1120 (ACOnet/VIX Service AS). The router Service.ACO.net/AS1120 is offering access to some special servers/services for all VIX members and is open to peer with all VIX members. Also the "VIX Looking Glass" is asking this router, which, besides of its VIX peerings, does not have any (not to speak about full) explicit routing information but a default route to the ACOnet Backbone (AS1853). This default route is NOT re-advertised to any VIX peer !

This looking glass wrt routing table therefore has only local meaning for VIX members and their customers. We might think of placing an explicit note there explaining the situation.

Thanks for your input anyway ! Regards CP

---

--- Christian Panigl : Vienna University Computer Center - ACOnet --- --- VUCC - ACOnet - VIX :

--- Universitaetsstrasse 7 : Mail: Panigl@CC.UniVie.ac.at (CP8-RIPE)

--- A-1010 Vienna / Austria : Tel: +43 1 4277-14032 (Fax: -9140) --- ---