Hello,

There is a problem with a F root-server node connected to UA-IX traffic exchange point (ix.net.ua, AS15645) since October, 14.

IP 192.5.5.241 is unreachable from our AS48438 since this date. Troubleshooting of this problem shows trace broken at:

  5     2 ms     2 ms     1 ms  kbp1b.f.root-servers.ix.net.ua [195.35.65.250]
  6     2 ms     1 ms     1 ms  iana.r1.kbp1.isc.org [192.228.86.1]
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.


IP 192.5.5.241 is also unreachable from UA-IX looking glass ( http://lg.ix.net.ua/ ):

Command: ping ipv4
Parameter: 192.5.5.241
________________________________

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.5.5.241, timeout is 2 seconds:
...U.
Success rate is 0 percent (0/5)


The route for 192.5.5.0/24 is present in routing database ( http://lg.ix.net.ua/ ):

Command: show ipv4 bgp
Parameter: 192.5.5.0/24
________________________________

BGP routing table entry for 192.5.5.0/24, version 47209171
BGP Bestpath: deterministic-med: cost-community-ignore
Paths: (2 available, best #1, table default)
  Advertised to update-groups:
     73         74         76         194        231        233      
  Refresh Epoch 1
  30128 3557, (aggregated by 30128 192.228.86.16)
    185.1.50.250 from 185.1.50.250 (192.228.86.17)
      Origin IGP, metric 2, localpref 100, valid, external, atomic-aggregate, best
      Community: 3557:10 15645:5
      rx pathid: 0, tx pathid: 0x0
  Refresh Epoch 1
  30128 3557, (aggregated by 30128 192.228.86.16)
    185.1.50.248 from 185.1.50.248 (192.228.86.16)
      Origin IGP, metric 12, localpref 100, valid, external, atomic-aggregate
      Community: 15645:5
      rx pathid: 0, tx pathid: 0


Please fix it. Thanks.