Just want to reflect (pun?) what others are saying, Centurylink wasn't letting
go of our routes.
As of about 2 minutes ago it seems out AS Prepend has finally began to propagate
_____
Tino Montemor | Skechers USA, Inc.
O: 310-406-0132 M: 909-721-6673
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Sent: Sunday, August 30, 2020 6:32:35 AM
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Subject: Outages Digest, Vol 147, Issue 10
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Today's Topics:
1. Re: CenturyLink peering issues? (David Hubbard)
2. Re: 3356 does not WITHDRAW bgp routes (randal k)
3. Re: 3356 does not WITHDRAW bgp routes (David Hubbard)
4. Re: CenturyLink peering issues? (Chris Adams)
5. Re: 3356 does not WITHDRAW bgp routes (randal k)
6. Re: CenturyLink peering issues? (Stephen Flynn)
----------------------------------------------------------------------
Message: 1
Date: Sun, 30 Aug 2020 12:22:27 +0000
From: David Hubbard <dhubb...@dino.hostasaurus.com>
To: "outages@outages.org" <outages@outages.org>
Subject: Re: [outages] CenturyLink peering issues?
Message-ID:
<d5bed54b-45c3-4ec8-9dba-ef1276d52...@dino.hostasaurus.com>
Content-Type: text/plain; charset="utf-8"
Ugh; seeing same thing. Have had sessions turned down for over two hours and
looking glasses are still showing 3356 propagating the advertisements.
?On 8/30/20, 8:11 AM, "Outages on behalf of Chris Adams via Outages"
<outages-boun...@outages.org on behalf of outages@outages.org> wrote:
Once upon a time, Stephen Flynn via Outages <outages@outages.org> said:
> Odd part --- I disconnected my Level3 circuit at the ORL-FL facility so
that I could fully failover to my other carrier link.
> Level3 is still advertising my routes, even though my link and BGP
session is down.
I can confirm this - I shut down IPv4 BGP with Level3 in Chicago, but
checking route-views and such, they're still advertising our routes (but
don't know how to get to us once packets hit their network)..
AS7007 all over again?
--
Chris Adams <c...@cmadams.net>
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------------------------------
Message: 2
Date: Sun, 30 Aug 2020 06:33:41 -0600
From: randal k <rkohutek+outa...@gmail.com>
To: outages@outages.org
Subject: Re: [outages] 3356 does not WITHDRAW bgp routes
Message-ID:
<CANeLk7RmHnXa=EieXpahpmM966bL8==7qsywr89yrd0fuz9...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Seeing the same thing - shut a peer, still seeing those routes via
3356 across multiple route-servers & looking glasses.
So, do we disconnect 3356 and suffer the blackhole in hopes that it
will eventually withdraw those routes, or leave it on to prevent
blackholing but suffer massive packet loss to other carriers? Wow.
On Sun, Aug 30, 2020 at 6:28 AM Lukas Tribus via Outages
<outages@outages.org> wrote:
>
> As previously mentioned by Stephen Flynn, 3356 does not WITHDRAW stale
> bgp routes, can be confirmed with AT&T's route server at (telnet
> route-server.ip.att.net).
>
> Stale routes from 1 hour + are still announced by 3356.
>
>
> This is causing blackholing.
> _______________________________________________
> Outages mailing list
> Outages@outages.org
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------------------------------
Message: 3
Date: Sun, 30 Aug 2020 12:47:57 +0000
From: David Hubbard <dhubb...@dino.hostasaurus.com>
To: "outages@outages.org" <outages@outages.org>
Subject: Re: [outages] 3356 does not WITHDRAW bgp routes
Message-ID:
<4ba8d9e3-9a4f-45fb-afe4-8bbb2e3c6...@dino.hostasaurus.com>
Content-Type: text/plain; charset="utf-8"
I tried bringing two circuits back up hoping to not have blackholing, one never
left idle, the other received <2000 routes, which I know from prior outages to
mean that the entire region (Tampa Bay) has been BGP isolated from the rest of
their network. Good times...
?On 8/30/20, 8:43 AM, "Outages on behalf of randal k via Outages"
<outages-boun...@outages.org on behalf of outages@outages.org> wrote:
Seeing the same thing - shut a peer, still seeing those routes via
3356 across multiple route-servers & looking glasses.
So, do we disconnect 3356 and suffer the blackhole in hopes that it
will eventually withdraw those routes, or leave it on to prevent
blackholing but suffer massive packet loss to other carriers? Wow.
On Sun, Aug 30, 2020 at 6:28 AM Lukas Tribus via Outages
<outages@outages.org> wrote:
>
> As previously mentioned by Stephen Flynn, 3356 does not WITHDRAW stale
> bgp routes, can be confirmed with AT&T's route server at (telnet
> route-server.ip.att.net).
>
> Stale routes from 1 hour + are still announced by 3356.
>
>
> This is causing blackholing.
> _______________________________________________
> Outages mailing list
> Outages@outages.org
>
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------------------------------
Message: 4
Date: Sun, 30 Aug 2020 07:48:14 -0500
From: Chris Adams <c...@cmadams.net>
To: outages@outages.org
Subject: Re: [outages] CenturyLink peering issues?
Message-ID: <20200830124814.gb29...@cmadams.net>
Content-Type: text/plain; charset=us-ascii
Once upon a time, randal k <rkohutek+outa...@gmail.com> said:
> It's weird you say that - I have been attempting to use Level3's well
> known communities to attempt to prepend, no-export etc and have been
> having limited luck ... and those communities even appear in
> route-views, so I know they're being sent!
I brought my session back up, not accepting any routes, and prepending
ours (just in case the change propagated)... it took a while, but
eventually I do see the prepended routes.
But for a provider that said they shut down their link to Level3, I
still see their routes... possibly (slowly) propagating changes but not
actual withdraws?
--
Chris Adams <c...@cmadams.net>
------------------------------
Message: 5
Date: Sun, 30 Aug 2020 06:52:16 -0600
From: randal k <rkohutek+outa...@gmail.com>
To: outages@outages.org
Subject: Re: [outages] 3356 does not WITHDRAW bgp routes
Message-ID:
<CANeLk7RcTGWkQp4SYJQO=j=c04dtpysgrxtxfk9ovi_qkgy...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Watching closely, after applying ^3356$ on our inbound routes, I can
see that they are bouncing sessions and slowly adding in prefixes -- I
have 17x 3356-originated routes in PA, and 893x in CO. And they have
reset the PA BGP session numerous times.
On Sun, Aug 30, 2020 at 6:33 AM randal k <rkohutek+outa...@gmail.com> wrote:
>
> Seeing the same thing - shut a peer, still seeing those routes via
> 3356 across multiple route-servers & looking glasses.
>
> So, do we disconnect 3356 and suffer the blackhole in hopes that it
> will eventually withdraw those routes, or leave it on to prevent
> blackholing but suffer massive packet loss to other carriers? Wow.
>
> On Sun, Aug 30, 2020 at 6:28 AM Lukas Tribus via Outages
> <outages@outages.org> wrote:
> >
> > As previously mentioned by Stephen Flynn, 3356 does not WITHDRAW stale
> > bgp routes, can be confirmed with AT&T's route server at (telnet
> > route-server.ip.att.net).
> >
> > Stale routes from 1 hour + are still announced by 3356.
> >
> >
> > This is causing blackholing.
> > _______________________________________________
> > Outages mailing list
> > Outages@outages.org
> > https://urldefense.proofpoint.com/v2/url?u=https-3A__puck.nether.net_mailman_listinfo_outages&d=DwICAg&c=bFAhm8rB5vXbGyJn-mWQSZrkEgY9uWkKpuo-JUqRuG4&r=Z3AiGMt06fETQSnc5l2T7vSIOF-bixsu4CbUYvAlOxM&m=Lr0Sp0x0UoGt1nlwfLsZu9_oFAIXiSqjH50CkdMWtVc&s=JPfcY3xr11kFtDNgRuUxEfMQsBNdk3iRqqwiw04UU60&e=
------------------------------
Message: 6
Date: Sun, 30 Aug 2020 13:32:31 +0000
From: Stephen Flynn <sfl...@staff.atlantic.net>
To: "outages@outages.org" <outages@outages.org>
Subject: Re: [outages] CenturyLink peering issues?
Message-ID:
<bn6pr19mb10269d437047598c160a6724eb...@bn6pr19mb1026.namprd19.prod.outlook.com>
Content-Type: text/plain; charset="us-ascii"
Just attempted a prepend (x4) on my Level3 advertisements --- only noticed a
change within the NTT network tables.
Other large carriers received no advertisement changes (Telia, Hurricane
Electric, AT&T)
I then noticed that my BGP session was constantly flapping. I've now shutdown
my circuit again. Level3 is still announcing my address space.
Thank you Level3!
Regards,
Stephen Flynn
Atlantic.Net
Direct: (321) 206-1390
sfl...@staff.atlantic.net
www.atlantic.net<http://www.atlantic.net>
-----Original Message-----
From: Outages <outages-boun...@outages.org> On Behalf Of Chris Adams via Outages
Sent: Sunday, August 30, 2020 8:48 AM
To: outages@outages.org
Subject: Re: [outages] CenturyLink peering issues?
CAUTION: This email originated from outside of the organization. Do not click
links or open attachments unless you recognize the sender and know the content
is safe.
Once upon a time, randal k <rkohutek+outa...@gmail.com> said:
> It's weird you say that - I have been attempting to use Level3's well
> known communities to attempt to prepend, no-export etc and have been
> having limited luck ... and those communities even appear in
> route-views, so I know they're being sent!
I brought my session back up, not accepting any routes, and prepending ours
(just in case the change propagated)... it took a while, but eventually I do
see the prepended routes.
But for a provider that said they shut down their link to Level3, I still see
their routes... possibly (slowly) propagating changes but not actual withdraws?
--
Chris Adams <c...@cmadams.net>
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