nanog mailing list archives
Re: Drops in Core
From: William Herrin <bill () herrin us>
Date: Sat, 15 Aug 2015 13:42:53 -0400
On Sat, Aug 15, 2015 at 1:31 PM, Glen Kent <glen.kent () gmail com> wrote:
Is there a paper or a presentation that discusses the drops in the core?
Hi Glen, Probably, but I don't know where to point you.
If i were to break the total path into three legs -- the first, middle and the last, then are you saying that the probability of packet loss is perhaps 1/3 in each leg (because the packet passes through different IXes). That sounds too aggressive for the middle mile. Dont you think so?
Break it in to five legs: 1. Your immediate last mile 2. The set of networks you directly or indirectly pay to transmit and receive packets 3. The border link between your networks and the remote user's networks 4. The set of networks the remote user directly or indirectly pays to transmit and receive packets 5. The remote user's immediate last mile In some cases, your packets meet on a network which both you and the remote user pay for. In those cases, leg 3 does not exist. However, those cases are less common than the one where neither of you pays the same networks. Legs 1 and 5 are often over noisy copper wire suspended from a street pole. Leg 3 is routinely under-provisioned (too little bandwidth for the traffic demand). Legs 2 and 4 rarely exhibit loss for long. Regards, Bill Herrin -- William Herrin ................ herrin () dirtside com bill () herrin us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
Current thread:
- Re: Drops in Core, (continued)
- Re: Drops in Core William Herrin (Aug 15)
- Re: Drops in Core Glen Kent (Aug 15)
- Re: Drops in Core Job Snijders (Aug 15)
- Re: Drops in Core Patrick W. Gilmore (Aug 16)
- Re: Drops in Core Job Snijders (Aug 16)
- Re: Drops in Core Patrick W. Gilmore (Aug 16)
- Re: Drops in Core William Herrin (Aug 16)
- Re: Drops in Core Patrick W. Gilmore (Aug 17)
- Re: Drops in Core Justin Wilson - MTIN (Aug 17)
- Re: Drops in Core Patrick W. Gilmore (Aug 17)
- Re: Drops in Core William Herrin (Aug 15)
- Message not available
- Re: Drops in Core Rafael Possamai (Aug 15)
- Re: Drops in Core Christopher Morrow (Aug 17)