[Rdo-list] [CI] trystack, nodes are unreachable via ping

[whayutin]

CI is down atm

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| ID                                   | Name                                | Status | Task State | Power State | Networks                                                                                     |
+--------------------------------------+-------------------------------------+--------+------------+-------------+----------------------------------------------------------------------------------------------+
| 0e0a6b53-3934-4ad2-b6ed-a1f107bc8b27 | rdo-pksk-2ix85-rhos-ci-7-compute-1  | ACTIVE | -          | Running     | default=172.31.50.234, 8.21.28.141; packstack_int=172.31.40.226; packstack_pub=172.31.30.114 |
| 0f785e34-1620-47bd-89fb-59be77ac0b6b | rdo-pksk-2ix85-rhos-ci-7-compute-2  | ACTIVE | -          | Running     | default=172.31.50.233, 8.21.28.139; packstack_int=172.31.40.225; packstack_pub=172.31.30.113 |
| e9c5a700-48c1-4f75-972b-ed9ec103db7e | rdo-pksk-2ix85-rhos-ci-7-controller | ACTIVE | -          | Running     | default=172.31.50.232, 8.21.28.137; packstack_int=172.31.40.224; packstack_pub=172.31.30.112 |
| 0c97c602-c5f3-456c-a3c9-0c96aae3b070 | rdo-pksk-2ix85-rhos-ci-7-network    | ACTIVE | -          | Running     | default=172.31.50.235, 8.21.28.147; packstack_int=172.31.40.227; packstack_pub=172.31.30.115 |
| cf2b06ae-15d1-4969-ae4d-a489ff4fed4a | rdo-pksk-2ix85-rhos-ci-7-tester     | ACTIVE | -          | Running     | default=172.31.50.236, 8.21.28.149; packstack_int=172.31.40.228; packstack_pub=172.31.30.116 |
| d18220c5-6598-4594-a87d-ec2265e2eabb | slave04-permanent                   | ACTIVE | -          | Running     | default=172.31.50.62, 8.21.28.38                                                             |
+--------------------------------------+-------------------------------------+--------+------------+-------------+----------------------------------------------------------------------------------------------+
[whayutin at unknown28D244B4CE31 khaleesi-settings]$ ping 8.21.28.141
PING 8.21.28.141 (8.21.28.141) 56(84) bytes of data.
From 8.21.28.141 icmp_seq=1 Destination Host Unreachable
From 8.21.28.141 icmp_seq=5 Destination Host Unreachable
^C
--- 8.21.28.141 ping statistics ---
9 packets transmitted, 0 received, +2 errors, 100% packet loss, time 8002ms
pipe 4
[whayutin at unknown28D244B4CE31 khaleesi-settings]$ ping 8.21.28.137
PING 8.21.28.137 (8.21.28.137) 56(84) bytes of data.
From 8.21.28.35 icmp_seq=1 Destination Host Unreachable
^C
--- 8.21.28.137 ping statistics ---
4 packets transmitted, 0 received, +1 errors, 100% packet loss, time 3000ms
pipe 4