nanog mailing list archives
RE: BCP38 - Internet Death Penalty
From: Adam Vitkovsky <adam.vitkovsky () swan sk>
Date: Thu, 28 Mar 2013 15:51:30 +0100
Yes I see now I have worded it miserably :) What I got on my mind was an eBGP session to stub site /single homed customer. Now that I think about it I believe it could have been "on" by default on all the router interfaces and would have to be turned off manually(or automatically if mpls is enabled on the interface) for core interfaces and interfaces facing dual-homed sites. Anyways disabling urpf would than soon become a part of standard interface-config templates. So I guess no matter what tools we'd have it boils down to (and I don't want to use a word "laziness") maybe comfortability of operators. adam -----Original Message----- From: wherrin () gmail com [mailto:wherrin () gmail com] On Behalf Of William Herrin Sent: Thursday, March 28, 2013 2:43 PM To: Adam Vitkovsky Cc: Saku Ytti; nanog () nanog org Subject: Re: BCP38 - Internet Death Penalty On Thu, Mar 28, 2013 at 8:20 AM, Adam Vitkovsky <adam.vitkovsky () swan sk> wrote:
It's a pity that rpf is not "on" by default for interfaces over which the ebgp session is configured.
Hi Adam, Considering that's one of the key scenarios for which RPF is known to NOT WORK reliably, I would have to disagree with that statement. Folks running BGP expect to manipulate routes asymmetrically. If you had said, "It's a pity that RPF is not on by default over interfaces for which no routing protocol is configured (connected and static routes only)" I might have agreed with you. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: BCP38 - Internet Death Penalty, (continued)
- Re: BCP38 - Internet Death Penalty Jack Bates (Mar 27)
- Re: BCP38 - Internet Death Penalty Mark Andrews (Mar 27)
- Re: BCP38 - Internet Death Penalty Jack Bates (Mar 27)
- Re: BCP38 - Internet Death Penalty Valdis . Kletnieks (Mar 27)
- Re: BCP38 - Internet Death Penalty Jay Ashworth (Mar 27)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 27)
- Re: BCP38 - Internet Death Penalty Jack Bates (Mar 27)
- Re: BCP38 - Internet Death Penalty Saku Ytti (Mar 27)
- RE: BCP38 - Internet Death Penalty Adam Vitkovsky (Mar 28)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 28)
- RE: BCP38 - Internet Death Penalty Adam Vitkovsky (Mar 28)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 28)
- Re: BCP38 - Internet Death Penalty Leo Bicknell (Mar 28)
- Re: BCP38 - Internet Death Penalty Chris Adams (Mar 28)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 28)
- Re: BCP38 - Internet Death Penalty Leo Bicknell (Mar 28)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 28)
- RE: BCP38 - Internet Death Penalty Adam Vitkovsky (Mar 29)
- Re: BCP38 - Internet Death Penalty William Herrin (Mar 29)
- Re: BCP38 - Internet Death Penalty Dobbins, Roland (Mar 28)
- Re: BCP38 - Internet Death Penalty John Curran (Mar 27)