Did Level3 withdraw 4.0.0.0/8 today and start announcing it as two /9s? -Hank
On Tue, 20 Sep 2011, Patrick W. Gilmore wrote: Newbie question: If I do: route-views>sho ip bgp 4.0.0.0 BGP routing table entry for 4.0.0.0/9, version 821994 why do I see the /9 and not the /8 by default? If I do a specific lookup for 4.0.0.0/8 it is there as well. Thanks, Hank
On Sep 20, 2011, at 1:13 PM, Hank Nussbacher wrote:
Did Level3 withdraw 4.0.0.0/8 today and start announcing it as two /9s?
I don't know if it was today, but I see two /9s.
On 9/20/11 10:22 , Hank Nussbacher wrote:
On Tue, 20 Sep 2011, Patrick W. Gilmore wrote:
Newbie question:
If I do: route-views>sho ip bgp 4.0.0.0 BGP routing table entry for 4.0.0.0/9, version 821994
why do I see the /9 and not the /8 by default? If I do a specific lookup for 4.0.0.0/8 it is there as well.
more-specific wins unless you specifically ask for all routes.
Thanks, Hank
On Sep 20, 2011, at 1:13 PM, Hank Nussbacher wrote:
Did Level3 withdraw 4.0.0.0/8 today and start announcing it as two /9s?
I don't know if it was today, but I see two /9s.
Once upon a time, Hank Nussbacher <hank@efes.iucc.ac.il> said:
Newbie question:
If I do: route-views>sho ip bgp 4.0.0.0 BGP routing table entry for 4.0.0.0/9, version 821994
why do I see the /9 and not the /8 by default? If I do a specific lookup for 4.0.0.0/8 it is there as well.
I'd guess because that's the way routing lookups work; the more-specific match always "wins". -- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.
On Tue, Sep 20, 2011 at 08:13:09PM +0300, Hank Nussbacher wrote:
Did Level3 withdraw 4.0.0.0/8 today and start announcing it as two /9s?
Level3 has been announcing 2x /9's as well as the /8 for some time now, ever since Telefonica's unfortunate incident where they allowed a customer to hijack 12.0.0.0/8 because they don't prefix-list filter customers properly IIRC. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
On Tue, Sep 20, 2011 at 1:27 PM, Richard A Steenbergen <ras@e-gerbil.net> wrote:
On Tue, Sep 20, 2011 at 08:13:09PM +0300, Hank Nussbacher wrote:
Did Level3 withdraw 4.0.0.0/8 today and start announcing it as two /9s?
Level3 has been announcing 2x /9's as well as the /8 for some time now, ever since Telefonica's unfortunate incident where they allowed a
<cough>I think they still don't</cough> -chris
participants (6)
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Chris Adams -
Christopher Morrow -
Hank Nussbacher -
Joel jaeggli -
Patrick W. Gilmore -
Richard A Steenbergen