+1 for 10a. We've yet to have an instance where 10a wouldn't suit our needs and its much less headache than 10b (IMHO).
-d > From: "Oliver Boehmer (oboehmer)" <[EMAIL PROTECTED]> > Date: Fri, 6 Jun 2008 08:48:20 +0200 > To: Vikas Sharma <[EMAIL PROTECTED]>, <[email protected]>, > "Krishnaji Panse (kpanse)" <[EMAIL PROTECTED]>, "Tom Mulvey (tmulvey)" > <[EMAIL PROTECTED]> > Conversation: Short pipe with Inter-as option 10b > Subject: Re: [c-nsp] Short pipe with Inter-as option 10b > > Vikas Sharma <mailto:[EMAIL PROTECTED]> wrote on Friday, June 06, > 2008 5:11 AM: > >> Hi, >> >> Need your expert comment on what QoS mechanism to be used for >> Inter-As option 10b, pipe mode or short pipe mode. This is for ISP >> setup. What is the trend in ISP industry? > > well, Inter-Provider QoS is still a general challenge (whether it is > MPLS-VPN InterAS or plain IP interconnectivity). > My personal take on this (possibly not having a conclusive picture of > what's being done): > > - On the ASBR in a 10b setup, packets are rcvd and sent labelled, so > pipe vs. short-pipe doesn't apply (the difference between pipe and > short-pipe is the QoS classification on the IPv4 PE-CE link at the very > edge of the network). > > - If 10b is used and the QoS classes don't match, you re-classify by > changing EXP bits of the top label, so the ASBR plays the same role as a > P node, and changing MPLS PHB on P devices is possible with any MPLS > Diffserv tunneling modes, including uniform mode, so the question pipe > vs. short-pipe doesn't apply. > > - Many providers actually prefer Inter-AS option 10a as they can look at > the IPv4 header to apply granular filtering and QoS. Obviously, 10a has > scalability challenges, and a new Inter-AS option 10d (or 10a+b) > draft-kulmala-l3vpn-interas-option-d addresses those by combining the > IPv4 forwarding properties of 10a with the scalable vpnv4 control plane > of 10b, so I might also call this a "trend". > > my 2c > > oli > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ This email and any attachments ("Message") may contain legally privileged and/or confidential information. If you are not the addressee, or if this Message has been addressed to you in error, you are not authorized to read, copy, or distribute it, and we ask that you please delete it (including all copies) and notify the sender by return email. Delivery of this Message to any person other than the intended recipient(s) shall not be deemed a waiver of confidentiality and/or a privilege. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
