yahoo-eng-team team mailing list archive

[Diko Parvanov <1883288@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Following scenario:
 - cloud:bionic-stein
 - internal and external networks are shared
 - security groups allow all
 - firewall allows all
 - architecture picture: https://snipboard.io/RTWK2y.jpg

Running ping from S4 to S1 works, but to S2 or S3 does not. Ping to the
leg on the router R2 in network B works from S4 works, but Destination
Host Unreachable is returned for the other 2 instances (S2 and S3).

Reverse path also works from S1 to S4, ping to the legs on the networks
is OK, but ping from S2 or S3 to S4 does not work.

Only by adding R3 in the picture with random legs on network A and
network B (NOT configured in any static routes) ping starts to work to
the other instances and vice-versa. Removing R3 - ping stops.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1883288

Title:
  Improper routing between private networks

Status in neutron:
  New

Bug description:
  Following scenario:
   - cloud:bionic-stein
   - internal and external networks are shared
   - security groups allow all
   - firewall allows all
   - architecture picture: https://snipboard.io/RTWK2y.jpg

  Running ping from S4 to S1 works, but to S2 or S3 does not. Ping to
  the leg on the router R2 in network B works from S4 works, but
  Destination Host Unreachable is returned for the other 2 instances (S2
  and S3).

  Reverse path also works from S1 to S4, ping to the legs on the
  networks is OK, but ping from S2 or S3 to S4 does not work.

  Only by adding R3 in the picture with random legs on network A and
  network B (NOT configured in any static routes) ping starts to work to
  the other instances and vice-versa. Removing R3 - ping stops.

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