nanog mailing list archives
Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?]
From: Jay Ashworth <jra () baylink com>
Date: Wed, 5 Feb 2014 16:24:42 -0500 (EST)
----- Original Message -----
From: "Octavio Alvarez" <alvarezp () alvarezp ods org>
Maybe I'm oversimplifying things but I'm really curious to know why can't the nearest-to-end-user ACL-enabled router simply have an ACL to only allows packets from end-users that has a valid source-address from the network segment they provide service to.
The common answer, Octavio, at least *used to* be "our line cards aren't smart enough to implement strict-unicast-RPF, and our boxes don't have enough horsepower to handle every packet through the CPU". As I've noted, I'm not sure I believe that's true of current generation gear, and if it *is*, then it should cost manufacturers business. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
Current thread:
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?], (continued)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] goemon (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Tony Tauber (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Randy Bush (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Livingood, Jason (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Octavio Alvarez (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Livingood, Jason (Feb 04)
- RE: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Frank Bulk (Feb 04)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Livingood, Jason (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Christopher Morrow (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Robert Drake (Feb 06)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Jay Ashworth (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] joel jaeggli (Feb 05)
- BCP38 is hard; let's go shopping! Jay Ashworth (Feb 05)
- Re: BCP38 is hard; let's go shopping! joel jaeggli (Feb 05)
- Re: BCP38 is hard; let's go shopping! Christopher Morrow (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Seth Mattinen (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Mark Tinka (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Jay Ashworth (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Mark Tinka (Feb 05)
- Re: BCP38 [Was: Re: TWC (AS11351) blocking all NTP?] Jay Ashworth (Feb 05)
- Re: TWC (AS11351) blocking all NTP? William Herrin (Feb 04)