As a side note you can filter between AS when using option B, you just have to filter the BGP extended RT community. So, you do have some granular filtering available to you.
Just to confuse you all, option D has been developed which is a mixture of A & B, but maybe you should read about that after you've finished your lab studies :-) --Dan > -----Original Message----- > From: [email protected] [mailto:ccie_sp- > [email protected]] On Behalf Of Kaj Niemi > Sent: 09 September 2009 18:57 > To: Bryan Bartik; Jo Knight > Cc: [email protected]; Francisco; [email protected] > Subject: Re: [OSL | CCIE_SP] Inter-AS VPN Option B and send-label > > > Option A (B2B VRF) doesn't really scale in real life unless you're only > doing a few of them. > > I'd say Option B is commonly used although I'm not aware of an official > study. You're explicitly trusting the other side to send you the right stuff > though as you cannot filter based on label in IOS (last I checked). No such > problems with option A. > > > > Kaj > > > > > From: Bryan Bartik <[email protected]> > > Date: Wed, 9 Sep 2009 08:38:18 -0700 > > To: Jo Knight <[email protected]> > > Cc: <[email protected]>, Francisco > > <[email protected]>, <[email protected]> > > Subject: Re: [OSL | CCIE_SP] Inter-AS VPN Option B and send-label > > > > > > I don't know that there is a normal one! As far as ease of > > configuration B2B VRF is the easiest, everything else is some form of > > External MP-BGP (with options for send-label, multi-hop, next-hop-self). This email has been scanned for all viruses. Please consider the environment before printing this email. The content of this email and any attachment is private and may be privileged. If you are not the intended recipient, any use, disclosure, copying or forwarding of this email and/or its attachments is unauthorised. If you have received this email in error please notify the sender by email and delete this message and any attachments immediately. Nothing in this email shall bind the Company or any of its subsidiaries or businesses in any contract or obligation, unless we have specifically agreed to be bound. KCOM Group PLC is a public limited company incorporated in England and Wales, company number 02150618 and whose registered office is at 37 Carr Lane, Hull, HU1 3RE. 118288 - KCOM UK Directory Enquiries. Calls will cost no more than 49p connection + 14p per minute including VAT from a KC or BT landline. Call charges from mobiles and other networks may vary. If you are calling from a mobile you will now receive your requested number via text message. You will not be charged for the text message. _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
