Hi Jimmi - thanks for sharing - some comments / questions inline below On Mon, Nov 9, 2009 at 10:07 AM, jimmi <[email protected]> wrote:
> > Folks. > > I read these papers long time ago, so I do not remember anymore exactly > what > this options labels (A, B, AB,...) definition means. > Quick recap for you: Option A = back to back VRF's via sub-interfaces and BGP peering PER VRF (lots of resources) Option B = exchange of VPN-IPv4 addresses and agreement on RT's and label switched path from ingress PE to egress PE routers Option AB (aka option D as I've learned): VRF's and sub-interface per client and a single eBGP session to carry VPN-IPv4 addresses > > What I can tell you guys is that I operate a network which has a Inter-AS > peering were we exchange IPv4 & VPNv4 prefixes and traffic while > maintaining > QoS services compability at both sides (ASs) for long time, and customers > which VPNs have sites serviced by both ASs have their QoS requirements > honored > at both ASs Backbones and last mile connections. > Sounds like your are doing option B? > > I already had real "Inter-AS + QoS compatibility" experience with Cisco > being > the only platform, and where Cisco interoperate with (two) different > vendors, > and that worked just fine. > On your ASBR - do you have to create VRF's for every customer that crosses the ASBR? Do you mind sharing the relveant parts of your configuration (sanitized of course) if possible? > > This deployment where you just had to establish a single eBGP peering at > VPNv4 > address-family to exchange VPNv4 prefixes and traffic (of course you may > exchange IPv4 also, and may establish redundant peerings) brings lots of > benefits. It does not impact at your ASBR resources, reduces the number of > connections between ASBRs & routing gets simplified, allows > oversubscription > between ASBRs, does not require your to act at the borders (ASBRs) each > time a > "site" is added or removed from a customer VPN (despite where this site is > connected). > That's interesting actually - sounds pretty straight forward. So far it seems like some overseas operators are actually doing this or contemplating doing it. Anyone in the continental US researching and/or implemented (ing) either of the options? Kenny > > > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
