nanog mailing list archives
Re: multi homing pressure
From: Daniel Senie <dts () senie com>
Date: Wed, 19 Oct 2005 13:35:29 -0400
At 01:05 PM 10/19/2005, John Dupuy wrote:
For the customer with an Internet "mission critical app", being tied to a Tier 2 has it's own set of problems, which might actually be worse than being tied to a Tier 1.The key word is "might". In fact, I would posit that a Tier 2 with multiply redundant transit to all of the Tier 1s could theoretically have better connectivity than an actual Tier 1. The Tier 2 transit provides flexibility that the transit-free Tier 1s do not have. Just my opinion.Anyway, it has been my experience that most (but not all) of the customers that want to "multihome" are _really_ wanting either: A. geographic/router redundancy. or B. easy renumbering. Geographic redundancy can be done within a single AS and IP block. They just don't know to ask it that way. (And easy renumbering will eventually be solved with v6. Eventually.)
It has been my experience that most needing to multihome wish to do so to avoid failures within an ISP, failures with a circuit to the ISP, and failures with routers.
I should think that with the recent L3/Cogent issue, it should be QUITE clear that multihoming requires linking to two separate backbones, or two separate regionals that buy transit from multiple backbones. Vagaries in backbone providers is high on the list, IMO, and rules out the "multihome to a single provider" approach.
The demand for multi-homing might not be as great as suspected. John
Current thread:
- Re: multi homing pressure, (continued)
- Re: multi homing pressure Patrick W. Gilmore (Oct 19)
- Re: multi homing pressure Elmar K. Bins (Oct 19)
- Re: multi homing pressure Owen DeLong (Oct 19)
- Re: multi homing pressure Elmar K. Bins (Oct 20)
- Re: multi homing pressure Owen DeLong (Oct 20)
- Re: multi homing pressure Elmar K. Bins (Oct 20)
- Re: multi homing pressure Owen DeLong (Oct 20)
- Re: multi homing pressure Elmar K. Bins (Oct 21)
- Re: multi homing pressure Erik Haagsman (Oct 19)
- Re: multi homing pressure John Dupuy (Oct 19)
- Re: multi homing pressure Daniel Senie (Oct 19)
- Re: multi homing pressure Alexei Roudnev (Oct 23)
- Re: multi homing pressure James (Oct 24)
- Re: multi homing pressure Christopher L. Morrow (Oct 19)
- Re: multi homing pressure Owen DeLong (Oct 19)