Re: Need help from UUNet's routing specialist!
We (as8470) are Teleglobe customer. And we experience terrible delays on Teleglobe to UUNet interconnect points. Teleglobe's customer support engineers insist, that the problem caused by UUNet's routes prioritization. But I belive that this assymetric routing initiated by Teleglobe, not UUNet.
We apologise for this customer-provider issue propogating to NANOG. For the information of interested folks, and to clear up any incorrect perceptions, I have copied the list on my reply. Currently, private interconnects from Teleglobe to UUnet are multiple DS-3's, in multiple cities. However, as a result of incremental load, the management and load-balancing of these is tenuous, and event-sensitive. Specifically, internal events on either network, can cause congestion as a new closest-exit path is chosen. We are currently waiting for delivery of several OC-12 circuits to replace the plethora of DS-3's. Unfortunately, provisioning OC-12's is not something many LEC's can do, let alone in a timely manner. When these are in place, the problems should go away for the forseeable future. Provisioning of additional OC-12's should be feasible in the timelines anticipated for further growth of traffic. Until then, there is some traffic engineering being done via MEDs, for the purposes of avoiding congestion. Some of this is steady-state (since certain peerin glocations are currently under-provisioned), and some is in response to congestion events. In the absence of inter-provider MPLS, to handle such things inter-provider and intra-provider outages in a semi-optimal fashion, and in the absense of excess interconnect bandwidth (to handle outage-based peak loads), there will be instances where asymmetry is required to minimize network impact of such outages. The selection of routes for application of MEDs is done on a random basis, for scalability reasons. The choice of exit modulo these MEDs is still closest exit, and will vary based on the geographic location of the end system. (The MEDs are used to de-prefer a couple of peering locations; all others operate naturally, ie closest-exit.) I hope this explanation is clear enough; if anyone has questions about this or other Teleglobe issues, please feel free to contact me directly. -- Brian Dickson, Email: briand@teleglobe.net Director, Backbone Engineering Tel : +1 703 755 2056 Teleglobe Communications Corp., Fax : +1 703 755 2648 Rm 3214, 11480 Commerce Park Drive, Cell : +1 703 851 9053 Reston, Virginia, USA, 20191 http://www.teleglobe.com
We apologise for this customer-provider issue propogating to NANOG. For the information of interested folks, and to clear up any incorrect perceptions, I have copied the list on my reply.
Currently, private interconnects from Teleglobe to UUnet are multiple DS-3's, in multiple cities. However, as a result of incremental load, the management and load-balancing of these is tenuous, and event-sensitive. Specifically, internal events on either network, can cause congestion as a new closest-exit path is chosen.
We are currently waiting for delivery of several OC-12 circuits to replace the plethora of DS-3's. Unfortunately, provisioning OC-12's is not something many LEC's can do, let alone in a timely manner. When these are in place, the problems should go away for the forseeable future. Provisioning of additional OC-12's should be feasible in the timelines anticipated for further growth of traffic.
I hope this explanation is clear enough; if anyone has questions about this or other Teleglobe issues, please feel free to contact me directly.
Apologies for the late reply Brian, it took me a week to recover from the shock of a response from Teleglobe. As you appear to be unable to communication to your customer services people I've taken the liberty to forward your email to them so that they can explain your UUNET problems to your customers. The only question I have for you Brian, is why do customers of Teleglobe have to take such extreme measures [like posting to nanog] to find out about issues that affect their service? We have opened several tickets relating to UUNET problems and your customer services people continue to blame UUNET and continue to provide inaccurate information. We ask for more information, infact you managed to break your filter program again at the weekend and blamed it on an Internet Affecting Problem? What kind of explanation is that? None of our other Transit providers had this "Internet Affecting Problem". We ask for more information and we get a different person quoting the previous email, and you then wonder why people email nanog and other forums? I actually feel sorry for your customer services people, who are more lost than Mars Polar Lander. Regards, Neil. -- Neil J. McRae - Alive and Kicking. neil@DOMINO.ORG
[Apologise for duplicate - bounced to NANOG list first time. BPD] In a prior message to NANOG, I write:
We apologise for this customer-provider issue propogating to NANOG.
Then, in reply, Neil McRae responds, *to NANOG*, at length, complaints of the same nature. I am directing this discussion between him and us, to private email. The words I have for him will not be for delicate ears.
We ask for more information [snip]
The UUnet-Teleglobe connectivity is under NDA. This stands for "non-disclosure"; as in we are not allowed to disclose details (previous posting notwithstanding). This includes customers, Neil. Again, I direct any inquiries to myself, in email, and *please* do *not* copy the NANOG list, so I don't have to send more messages like this. -- Brian Dickson, Email: briand@teleglobe.net Director, Backbone Engineering Tel : +1 703 755 2056 Teleglobe Communications Corp., Fax : +1 703 755 2648 Rm 3214, 11480 Commerce Park Drive, Cell : +1 703 851 9053 Reston, Virginia, USA, 20191 http://www.teleglobe.com
I am directing this discussion between him and us, to private email. The words I have for him will not be for delicate ears.
Brian, you're so masterful! ;-) My apologies for wasting everyone's time on nanog but thanks for all the reponses :-). I hope that everyone has a quiet and outage free Christmas and a bug free New Year, and especially you Brian! :-) Regards, Neil. -- Neil J. McRae - Alive and Kicking. neil@DOMINO.ORG
participants (2)
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Brian Dickson
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Neil J. McRae