nanog mailing list archives
Re: BGP prefix filter list
From: Mike Hammett <nanog () ics-il net>
Date: Wed, 15 May 2019 13:52:48 -0500 (CDT)
You can't do uRPF if you're not taking full routes. You also have a more limited set of information for analytics if you don't have full routes. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Ca By" <cb.list6 () gmail com> To: "Dan White" <dwhite () olp net> Cc: nanog () nanog org Sent: Wednesday, May 15, 2019 1:50:41 PM Subject: Re: BGP prefix filter list On Wed, May 15, 2019 at 7:27 AM Dan White < dwhite () olp net > wrote: On 05/15/19 13:58 +0000, Phil Lavin wrote:
We're an eyeball network. We accept default routes from our transit providers so in theory there should be no impact on reachability. I'm pretty concerned about things that I don't know due to inefficient routing, e.g. customers hitting a public anycast DNS server in the wrong location resulting in Geolocation issues.Ah! Understood. The default route(s) was the bit I missed. Makes a lot of sense if you can't justify buying new routers. Have you seen issues with Anycast routing thus far? One would assume that routing would still be fairly efficient unless you're picking up transit from non-local providers over extended L2 links.
We've had no issues so far but this was a recent change. There was no noticeable change to outbound traffic levels. +1, there is no issue with this approach. i have been taking “provider routes” + default for a long time, works great. This makes sure you use each provider’s “customer cone” and SLA to the max while reducing your route load / churn. IMHO, you should only take full routes if your core business is providing full bgp feeds to downstrean transit customers. <blockquote> -- Dan White BTC Broadband Network Admin Lead Ph 918.366.0248 (direct) main: (918)366-8000 Fax 918.366.6610 email: dwhite () mybtc com http://www.btcbroadband.com </blockquote>
Current thread:
- BGP prefix filter list Baldur Norddahl (May 15)
- Re: BGP prefix filter list Anderson, Charles R (May 15)
- Re: BGP prefix filter list Martin Hannigan (May 20)
- Re: BGP prefix filter list Dan White (May 15)
- RE: BGP prefix filter list Phil Lavin (May 15)
- Re: BGP prefix filter list Dan White (May 15)
- RE: BGP prefix filter list Phil Lavin (May 15)
- Re: BGP prefix filter list Dan White (May 15)
- Re: BGP prefix filter list Ca By (May 15)
- Re: BGP prefix filter list Mike Hammett (May 15)
- Re: BGP prefix filter list Ca By (May 15)
- Re: BGP prefix filter list Mike Hammett (May 15)
- Re: BGP prefix filter list Blake Hudson (May 16)
- Re: BGP prefix filter list Radu-Adrian Feurdean (May 17)
- Re: BGP prefix filter list Blake Hudson (May 17)
- Re: BGP prefix filter list / BGP hijacks, different type Denys Fedoryshchenko (May 17)
- Re: BGP prefix filter list / BGP hijacks, different type Christopher Morrow (May 17)
- Re: BGP prefix filter list Radu-Adrian Feurdean (May 17)
- Re: BGP prefix filter list Blake Hudson (May 17)
- RE: BGP prefix filter list Phil Lavin (May 15)
- Re: BGP prefix filter list Baldur Norddahl (May 17)
- Re: BGP prefix filter list Anderson, Charles R (May 15)