4 ms·

Outages list [1] says routes aren't being announced via BGP anymore [2] [1]: https://puck.nether.net/mailman/listinfo/outages https://puck.nether.net/mailman/l

• xiaodown 10y ago
  Yep, i'm no expert, but a BGP looking glass seems to suggest that all of the best paths (chosen by AS pathlength?) are not being advertised to peers... But some routes are being advertised? Idk Router: Palo Alto, CA - US Command: show ip bgp 104.244.42.193 BGP routing table entry for 104.244.42.0/24 Versions: Process bRIB/RIB SendTblVer Speaker 261897778 261897778 Last Modified: Nov 7 06:11:36.675 for 00:02:37 Paths: (4 available, best #3) Advertised to update-groups (with more than one peer): 0.2 0.3 0.6 0.7 Advertised to peers (in unique update groups): 129.250.47.126 129.250.9.146 128.242.180.62 80.150.168.193 128.241.2.58 Path #1: Received by speaker 0 Not advertised to any peer 13414 13414 116.51.31.10 (metric 14530) from 129.250.0.18 (129.250.0.18) Origin IGP, localpref 120, valid, confed-internal Received Path ID 0, Local Path ID 0, version 0 Community: 2914:370 2914:1405 2914:2406 2914:3400 65400:4134 65420:4134 65460:4134 Path #2: Received by speaker 0 Not advertised to any peer 13414 13414 62.73.183.110 (metric 28640) from 129.250.0.30 (129.250.0.30) Origin IGP, localpref 120, valid, confed-internal Received Path ID 0, Local Path ID 0, version 0 Community: 2914:370 2914:1204 2914:2205 2914:3200 65400:4134 65420:4134 65460:4134 Path #3: Received by speaker 0 Advertised to update-groups (with more than one peer): 0.2 0.3 0.6 0.7 Advertised to peers (in unique update groups): 129.250.47.126 129.250.9.146 128.242.180.62 80.150.168.193 128.241.2.58 13414 13414 129.250.195.210 (metric 7029) from 129.250.0.115 (129.250.0.167) Origin IGP, localpref 120, valid, confed-internal, best, group-best Received Path ID 0, Local Path ID 1, version 261897778 Community: 2914:370 2914:1007 2914:2000 2914:3000 65400:4134 65420:4134 65460:4134 Originator: 129.250.0.167, Cluster list: 0.0.0.6 Path #4: Received by speaker 0 Not advertised to any peer 13414 13414 129.250.195.210 (metric 7029) from 129.250.0.116 (129.250.0.167) Origin IGP, localpref 120, valid, confed-internal Received Path ID 0, Local Path ID 0, version 0 Community: 2914:370 2914:1007 2914:2000 2914:3000 65400:4134 65420:4134 65460:4134 Originator: 129.250.0.167, Cluster list: 0.0.0.6 edit: sorry about formatting, i've tried to clean it up.
  • mfincham 10y ago
    You can ignore things like "Not advertised to any peer" in looking glass output, just a function of a router being used as the looking glass server and not participating in routing.
  • mmaunder 10y ago
    Updates from outages list: Update 1: Looks like their networks are not announced anymore. From 4 providers, we don't see any network matching 104.244.42.1, 104.244.42.65, 104.244.42.129 or 104.244.42.193 (A records for twitter.com) Update 2: show ip bgp 104.244.42.0/24 % Network not in table No routes present... Update 3: (3 mins ago) Networks are back now, but quite some packet loss. Also, Comcast in norcal goes via Level3 to Twitter in London. They are also announcing direct to NTT which seems to get served locally. So, they're not quite out of the woods yet.
• Myrth 10y ago
  https://twitter.com/NewWorldHacking/status/795510838916431872 https://twitter.com/NewWorldHacking/status/79551083891643187...
  • raus22 10y ago
    But why post that on twitter? That makes no sense.