nanog mailing list archives
Re: MPLS VPN design - RR in forwarding path?
From: Tony Varriale <tvarriale () comcast net>
Date: Thu, 01 Jan 2015 15:25:24 -0600
On 12/31/2014 6:08 AM, Marcin Kurek wrote:
Hi everyone,I'm reading Randy's Zhang BGP Design and Implementation and I found following guidelines about designing RR-based MPLS VPN architecture:- Partition RRs - Move RRs out of the forwarding path - Use a high-end processor with maximum memory - Use peer groups - Tune RR routers for improved performance.Since the book is a bit outdated (2004) I'm curious if these rules still apply to modern SP networks. What would be the reasoning behind keeping RRs out of the forwarding path? Is it only a matter of performance and stability?Thanks, Marcin
Overall, depends on your design and scale. But, I will comment on a few of your items...
We have RRs in the forwarding path but have a project to move them out in 2015. We feel it gives us more options as well as more flexibility when we move to the next phase of RR design (hierarchical).
Most vendors today have the performance numbers (sometimes they aren't published publically) for routers acting as RRs. Ask your vendor and pick one that suits you. We generally buy the middle or most memory and pick a reasonable processor. And, then we monitor :)
As for peer groups, you should have a design that allows you to herd most of the config snips together. Use the features that make your life easier and allow you to simplify your routing policies.
tv
Current thread:
- Re: MPLS VPN design - RR in forwarding path? Randy Bush (Dec 31)
- <Possible follow-ups>
- Re: MPLS VPN design - RR in forwarding path? Stephen Lee (Dec 31)
- Re: MPLS VPN design - RR in forwarding path? Marcin Kurek (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Mark Tinka (Jan 02)
- Re: MPLS VPN design - RR in forwarding path? Tony Varriale (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Baldur Norddahl (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Nick Hilliard (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Jeff Tantsura (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Mike Hammett (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Ca By (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Mark Tinka (Jan 02)
- Re: MPLS VPN design - RR in forwarding path? Nick Hilliard (Jan 02)
- Re: MPLS VPN design - RR in forwarding path? Mark Tinka (Jan 02)
- Re: MPLS VPN design - RR in forwarding path? Baldur Norddahl (Jan 01)
- Re: MPLS VPN design - RR in forwarding path? Rob Shakir (Jan 02)
- Re: MPLS VPN design - RR in forwarding path? Jeff Tantsura (Jan 02)