nanog mailing list archives
Re: Time Warner Routing Issue
From: Courtney Smith <courtneysmith () comcast net>
Date: Wed, 14 Dec 2011 17:40:14 -0500
On Dec 14, 2011, at 4:09 PM, nanog-request () nanog org wrote:
Message: 3 Date: Wed, 14 Dec 2011 15:46:52 -0500 From: Brian Christopher Raaen <mailing-lists () brianraaen com> To: nanog () nanog org Subject: Time Warner Routing Issue Message-ID: <CAEV7mMFS7pAmxwB_SLNpYEq9m3OwAL792k0hpSx5Nse2H=uHtg () mail gmail com> Content-Type: text/plain; charset=ISO-8859-1 They said the reason was they didn't have an LOA (which they had gotten back in October) and the ip blocks were not in the Level3 Radb list. I could still see announcement to some peers (Shaw Cable in Canada) in a few looking glasses and BGP routers. However my network blocks were not showing for the larger US carriers like Qwest and AT&T. One of their techs just called me back and said that Level3 should be advertising it, but I still do not see the routes on the AT&T route server. After noting that the tech said that it may take another day for BGP to "propagate" to other peers as they update their radb tables. In my experience I've never seen anything where I had to wait for a route to propagate other than standard routing table updates which usually take less then an hour, and I'd really not expect this many problems between Tier1 and Tier2 providers. I need to know if this matches other's experience and wanting to know what other people were seeing with traceroutes and "show ip bgp". The networks in question at the following 4 /24's 68.68.176.0/24 68.68.177.0/24 68.68.178.0/24 68.68.179.0/24 the serial ip address is 72.43.84.254 Thanks for your assistance. --- Brian Raaen Zcorum Network Architect
I believe the TWC tech is referring to prefix filter updates and not routing table updates. Some of TWC's peers most likely use IRR based filters on their BGP sessions. Most networks only check once a day for IRR changes and apply those changes to filters. It looks TWC put in proxy route objects today for your blocks so I am guessing someone at TWC forgot to make the updates in advance. Work around is for them to reach out to the peers with IRR based filters and request a manual update. Sounds like that is what they are doing. route: 68.68.176.0/24 descr: RR-RC-Princetown Cable Company, Inc.-Albany origin: AS11351 notify: ipaddreg () rr com mnt-by: MAINT-RR changed: ipaddreg () rr com 20111214 source: RADB route: 68.68.177.0/24 descr: RR-RC-Princetown Cable Company, Inc.-Albany origin: AS11351 notify: ipaddreg () rr com mnt-by: MAINT-RR changed: ipaddreg () rr com 20111214 source: RADB Run the below on 12/15 and it should return your blocks. $ whois -h filtergen.level3.net radb::as11351 | grep 68.6 $ Courtney Smith courtneysmith () comcast net () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments
Current thread:
- Time Warner Routing Issue Brian Christopher Raaen (Dec 14)
- Re: Time Warner Routing Issue Brian Christopher Raaen (Dec 14)
- <Possible follow-ups>
- Re: Time Warner Routing Issue Scott Weeks (Dec 14)
- Re: Time Warner Routing Issue Chris Stone (Dec 14)
- Re: Time Warner Routing Issue Grant Ridder (Dec 14)
- Re: Time Warner Routing Issue Chris Stone (Dec 14)
- Re: Time Warner Routing Issue Courtney Smith (Dec 14)