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NEW ON THE BLOCK
by Noah Adablah 21 Sep '09

21 Sep '09

Hello, I am new on the block. Kind regards, Noah Adablah RF Systems Manager Africa Online Holdings Ltd Tel : +233-21-211823 Cell: + 233 246541404 Email: <mailto:noahada@africaonline.com.gh> noahada(a)africaonline.com.gh AIM: noahadablah cid:image001.jpg@01C8D62B.E2CE7C60 A Member of the Telkom South Africa Group Africa Online Disclaimer and Confidentiality Note This e-mail, its attachments and any rights attaching hereto are, unless the context clearly indicates otherwise, the property of Africa Online Holdings (Mauritius) Limited and / or its subsidiaries ("the Group"). It is confidential and intended for the addressee only. Should you not be the addressee and have received this e-mail by mistake, kindly notify the sender, delete this e-mail immediately and do not disclose or use the same in any manner whatsoever. Views and opinions expressed in this e-mail are those of the sender unless clearly stated as those of the Group. The Group accepts no liability whatsoever for any loss or damages, however incurred, resulting from the use of this e-mail or its attachments. The Group does not warrant the integrity of this e-mail, nor that it is free of errors, viruses, interception or interference. For more information about Africa Online, please visit our website at <http://www.africaonline.com> http://www.africaonline.com

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West Coast U.S. interesting outage 21 Sept. ~1105h UTC
by Aaron Hughes 21 Sep '09

21 Sep '09

All, This morning around 0405h PDT there were several odd network outages around LA where packets simply stopped forwarding in several networks. I saw no circuit drops, however, several massive traffic drops. Thus far I have heard (unconfirmed) Telia had some kind of capacity drop / equipment failure and it has been fixed. Does anyone have any details on this and/or can confirm/deny this was a Telia outage? Cheers, Aaron -- Aaron Hughes aaronh(a)bind.com +1-831-824-4161 Key fingerprint = AD 67 37 60 7D 73 C5 B7 33 18 3F 36 C3 1C C6 B8 http://www.bind.com/

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2/8 and 46/8 allocated to the RIPE NCC
by Leo Vegoda 21 Sep '09

21 Sep '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, The IANA IPv4 registry has been updated to reflect the allocation of two /8 IPv4 blocks to the RIPE NCC in September 2009: 2/8 and 46/8. You can find the IANA IPv4 registry at: http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.txt Please update your filters as appropriate. The IANA free pool contains 26 unallocated unicast IPv4 /8s. Regards, Leo Vegoda Number Resources Manager, IANA -----BEGIN PGP SIGNATURE----- Version: 9.10.0.500 wj8DBQFKt6AdvBLymJnAzRwRAiscAKDaqyQYv8YLcXsg/tubUBe1THTNIACfQ0iP 23SVpODdlrWi0qEuEHVbi5c= =DVak -----END PGP SIGNATURE-----

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Multi-homed implementation and BGP convergence time
by Andrew.Claybaugh＠securian.com 21 Sep '09

21 Sep '09

Hello - my company currently has two connections with a single tier 1 ISP. We are using the AS from our ISP at this time. In the next month we will be implementing a third connection with a second tier 1 ISP, so we will now be using our own AS number on all three routers. My question is when we implement the new connection and update our existing connections to use are own AS number, how much downtime will there be? So far the second ISP has only said that it could be hours for BGP to fully converge. We are looking for more detail about how long the outage will be and how widespread. Will it be relatively short to our customers that are on one of the ISPs we are directly connected to? Is downtime less for customers on other tier 1 ISPs versus tier 2, etc. ISPs? We will only be receiving a default route on each of the three connections. Our routers will be advertising a small number of routes - 6 to 8. Thank you. Andy Claybaugh

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cross connect reliability
by Michael J McCafferty 21 Sep '09

21 Sep '09

All, Today I had yet another cross-connect fail at our colo provider. From memory, this is the 6th cross-connect to fail while in service, in 4yrs and recently there was a bad SFP on their end as well. This seemes like a high failure rate to me. When I asked about the high failure rate, they said that they run a lot of cables and there is a lot of jiggling and wiggling... lots of chances to get bent out of whack from activity near my patches and cables. Until a few years ago my time was spent mostly in single tenant data centers, and it may be true that we made fewer cabling changes and made less of a ruckus when cabling... but this still seems like a pretty high failure rate at the colo. I am curious; what do you expect the average reliability of your FastE or GigE copper cross-connects at a colo? Thanks, Mike -- ************************************************************ Michael J. McCafferty Principal, Security Engineer M5 Hosting http://www.m5hosting.com You can have your own custom Dedicated Server up and running today ! RedHat Enterprise, CentOS, Ubuntu, Debian, OpenBSD, FreeBSD, and more ************************************************************

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Re: Multi-POP design check/help question
by Fouant, Stefan 21 Sep '09

21 Sep '09

I don't know if you want to arbitrarily use local-pref and AS-Path prepend in a one-size-fits-all approach, as under certain scenarios it might be more beneficial to route traffic between POPs to take advantage of routes via shortest AS Path or other constraints. Why not just extend your IGP across all POPs and set inter-POP links to a higher metric? In this scenario, if a given route is received via muliple POPs and all things being equal (AS Path, etc.), you'll prefer to route traffic out the shortest-cost path to a POP exit point. Sorry for the top post, I'm on my BB. Stefan Fouant Neustar, Inc. / Principal Engineer 46000 Center Oak Plaza Sterling, VA 20166 Office: +1.571.434.5656 ▫ Mobile: +1.202.210.2075 ▫ GPG ID: 0xB5E3803D ▫ stefan.fouant(a)neustar.biz ----- Original Message ----- From: Rick Ernst <nanog(a)shreddedmail.com> To: nanog(a)nanog.org <nanog(a)nanog.org> Sent: Sun Sep 20 16:17:41 2009 Subject: Multi-POP design check/help question Cross-posted from cisco-nsp. We are a (mostly) Cisco shop, but I'm looking more for BCP and overall design, not provisioning specifics. ----- My Cisco bookshelf isn't helping me much with this... We currently have a single POP with border/core/aggregation topology. Upstreams each come in on their own border router and the core is used as a route-reflector for border and aggregation. The internal network uses OSPF as an IGP and each device is dual-connected for redundancy on independent layer-2 networks. OSPF load-shares with loopback IPs and IBGP uses the loopback addresses for peering. We are looking at turning up two additional POPs in the metro area, each connected by redundant GigE loops to the original POP. Each POP may have zero or more direct upstream connections. I'd like local traffic at each POP to prefer both in and outbound traffic via the local upstream, but still be able to failover to upstreams at other POPs if needed. My initial thoughts are to BGP peer between POPs with a higher local-pref for the local outbound traffic and to prepend between the POPs so inbound traffic is more likely to take the shortest path inbound. Is this too simplistic? Prone to trouble? What gotchas should I be looking at, or other designs should I be considering?

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FOSS WAN Acceleration Software
by BH 21 Sep '09

21 Sep '09

Hello, I was wondering if anyone had experience or could recommend free open source WAN Accelerators/Optimizers. There seems to be only one FOSS project called TrafficSqueezer but development has stopped and the project is still in an Alpha stage. I am not interested in the offerings of Cisco (WAAS) or Riverbed (StealHead) or any other appliance based solution. Thank-you in advance for any and all replies. -- BH

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Multi-POP design check/help question
by Rick Ernst 20 Sep '09

20 Sep '09

Cross-posted from cisco-nsp. We are a (mostly) Cisco shop, but I'm looking more for BCP and overall design, not provisioning specifics. ----- My Cisco bookshelf isn't helping me much with this... We currently have a single POP with border/core/aggregation topology. Upstreams each come in on their own border router and the core is used as a route-reflector for border and aggregation. The internal network uses OSPF as an IGP and each device is dual-connected for redundancy on independent layer-2 networks. OSPF load-shares with loopback IPs and IBGP uses the loopback addresses for peering. We are looking at turning up two additional POPs in the metro area, each connected by redundant GigE loops to the original POP. Each POP may have zero or more direct upstream connections. I'd like local traffic at each POP to prefer both in and outbound traffic via the local upstream, but still be able to failover to upstreams at other POPs if needed. My initial thoughts are to BGP peer between POPs with a higher local-pref for the local outbound traffic and to prepend between the POPs so inbound traffic is more likely to take the shortest path inbound. Is this too simplistic? Prone to trouble? What gotchas should I be looking at, or other designs should I be considering?

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BGP Confederation over Route Reflector
by devang patel 19 Sep '09

19 Sep '09

Hello, What are the advantages of BGP Confederation over Route Reflector? I mean when one should decide to deploy BGP Confederation over Route Reflector deployment? Thanks, Devang Patel

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colo space in vancouver, bc?
by Eric Brunner-Williams 19 Sep '09

19 Sep '09

Hi, I've a project that needs approximately a rack, in the Vancouver, BC area. Suggestions? Eric

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