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Author Topic: Can't connect to cogentco.com  (Read 9882 times)

gnarlymarley

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Re: Can't connect to cogentco.com
« Reply #15 on: August 31, 2013, 08:49:56 AM »

I noticed that cogent turns on the peering with he.net every so often specifically for 2001:550::/32.  I do not know why they do this.  There are enough peers from cogent that peer with he.net, that I would expect the BGP path to be relayed across, such as level3, tata, and abovenet.  Interestingly enough, I do see the route in their BGP tables.  Does anyone know if he.net is blocking AS174?
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broquea

  • Sr. Network Engineer, HE.NET AS6939
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Re: Can't connect to cogentco.com
« Reply #16 on: August 31, 2013, 08:53:38 AM »

Not aware that they were peering, that'd be awesome if they actually did. Logging into the HE route-server, I'm not seeing that network in their routing table:

Code: [Select]
route-server> sh ipv6 bgp 2001:550::/32
% Network not in table

How are you determining that this peering comes and goes? http://bgp.he.net/AS6939#_peers6 sorted by ASN doesn't show as174 either. The reason mutual cogent/HE peers aren't providing either network with a view of each other, is because they are PEERS, and not transits.
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