For the record, this "cheap path" is an OC-12 to a well connected Tier 1 provider that we got a "sweatheart" deal on, and, it's only 2 percent utilized. Again, I want to emphasize that I wholeheartedly agree with those who have commented on the concept of full disclosure in a scenario such as this. I'm just looking for technical opinions on how this can be accomplished most effectively. --Jeff --- Przemyslaw Karwasiecki <karwas@ifxcorp.com> wrote:
John,
First: I agree with you at your main point 110% so my other comment is strictly technical in nature.
Second: Correct me if I am wrong, but I believe that if you send to company X full view over EBGP there is no technical reason to forward packets over different AS path. After all, you are advertising reachability via NEXT_HOP, which will be your border router.
Before you flame me, please let me reiterate that I agree with you on the main point, that making a false/misleading AS_PATH advertisements is bad. But I am just curious if it would work provided that you are able to forward packets based on some 'coloring' scheme, so please consider my comment more as a question then questioning :-)
Thanks,
Przemek.
-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of John Fraizer Sent: Sunday, August 26, 2001 12:57 AM To: Jeff Cates Cc: nanog@merit.edu Subject: Re: Policy Routing
Replying to my own post with a bit more. (Forgive me!)
Rereading your post, one would believe that since "Company X" is a BGP customer of yours, you're going to be sending them a full view. Unless there is a knob that I'm not familiar with, that means that you're going to be sending them the _BEST_ routes that you see in your core and not just those from "NSP A" to which you are proposing to policy-route all of "Customer X's" traffic. If this is indeed the case, I would think that policy-routing the customers traffic destined for "prefix Y" via a path other than the path listed in the NLRI you're sending "Customer X" on their BGP feed is outright fraud.
Again, this is in the absence of full disclosure and it is my (non esquire) opinion.
--- John Fraizer EnterZone, Inc
On Sun, 26 Aug 2001, John Fraizer wrote:
I would be very upset if I were "Company X" and I
policy-routing my traffic to the "cheap" connection vs the best connection.
Is it just me or do others on the list believe
disclosure this would be shady at best?
--- John Fraizer EnterZone, Inc
On Sat, 25 Aug 2001, Jeff Cates wrote:
Hello,
I am a network engineer at a regional southeast
USA
NSP. I am looking for some recommendations concerning a scenario that has been presented to me.
My company is attempting to obtain company X's Internet transit traffic, which will be BGP-4
over either a T-3 or OC-3. Due to financial reasons, my upper management has proposed that I route company X's Internet traffic via a specific NSP that we
with, we'll call them NSP-A. Apparently, NSP-A has a substantially cheaper rate than our other upstrem providers and it is anticipated that this customer will be sending a full T3 or OC-3's worth of
to us.
Redirecting inbound traffic to company X via NSP-A can be accomplished very easily through use of AS
prepending, however, coming up with a solution for egress traffic from company X to NSP-A, via our AS, has proven a bit more challenging :-).
The only feasible solution that I've been able to come up with is to stick customer X directly on the router that peers with NSP-A and employ the use of
routing, which would enable me to set the next hop for company X's traffic to the peering address on NSP-A.
Our NSP-A peering router is a Cisco 12016, running IOS 12.0(16)S2 and it has 256MB of DRAM.
Additionally, it is configured with NetFlow and dCEF switching.
I've never employed policy routing in this type of environment and I am concerned about the overhead that it might place on the router or on the traffic traversing the interface.
I've also thought about MPLS TE, however, our core backbone does not run MPLS and even if we did, I believe I would still have to policy route the
to NSP-A once the MPLS label was popped off the last router in the path in transit to the NSP-A
found out that you were that in the absence of full peering peer traffic path policy traffic peering
router.
Any ideas or comments would be greatly appreciated.
Thanks in advance,
Jeff
catesjl9394@yahoo.com
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