Re: Multi-homed implementation and BGP convergence time

2009-09-21 Thread Andy Davidson
On 11 Sep 2009, at 21:54, andrew.clayba...@securian.com wrote: Hello - my company currently has two connections with a single tier 1 ISP. We are using the AS from our ISP at this time. In the next month we will be implementing a third connection with a second tier 1 ISP, so we will now be

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Seth Mattinen
Kevin Loch wrote: > Seth Mattinen wrote: >> Jay Hennigan wrote: >>> "Tier 1", "tier 2" etc. are terms used primarily by salespeople, and >>> don't have a lot to do with technical matters. >>> >> >> Sure it does. If you're multihoming it will increase your AS path length. > > There is no general co

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Kevin Loch
Seth Mattinen wrote: Jay Hennigan wrote: "Tier 1", "tier 2" etc. are terms used primarily by salespeople, and don't have a lot to do with technical matters. Sure it does. If you're multihoming it will increase your AS path length. There is no general correlation between AS path length and w

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Seth Mattinen
andrew.clayba...@securian.com wrote: > Hello - my company currently has two connections with a single tier 1 ISP. > We are using the AS from our ISP at this time. In the next month we will > be implementing a third connection with a second tier 1 ISP, so we will now > be using our own AS number on

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Seth Mattinen
Jay Hennigan wrote: > > "Tier 1", "tier 2" etc. are terms used primarily by salespeople, and > don't have a lot to do with technical matters. > Sure it does. If you're multihoming it will increase your AS path length. ~Seth

RE: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Holmes,David A
The time should be measured in seconds for your BGP advertised prefixes to propagate to most of the Internet. It may take longer for some isolated ISP's to receive the routes. If you use the longest prefix method to advertise to your preferred ISP, a convergence to the backup ISP (where shorter pre

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Jay Hennigan
andrew.clayba...@securian.com wrote: Hello - my company currently has two connections with a single tier 1 ISP. We are using the AS from our ISP at this time. In the next month we will be implementing a third connection with a second tier 1 ISP, so we will now be using our own AS number on all t

Re: Multi-homed implementation and BGP convergence time

2009-09-11 Thread Scott Weeks
--- andrew.clayba...@securian.com wrote: From: andrew.clayba...@securian.com own AS number, how much downtime will there be? So far the second ISP has only said that it could be hours for BGP to fully converge. We are looking for more detail about how long the outage will be and how widespread