Bug 2263502 - [17.1][OVN][DVR][SNAT] tcp communication between vms on different platforms using provider network is broken when snat in enabled
Summary: [17.1][OVN][DVR][SNAT] tcp communication between vms on different platforms u...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: rhosp-openvswitch
Version: 17.1 (Wallaby)
Hardware: x86_64
OS: Linux
high
high
Target Milestone: z4
: 17.1
Assignee: Miro Tomaska
QA Contact: Bharath M V
URL:
Whiteboard:
Depends On: 2262077
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-02-09 12:32 UTC by Flavio Piccioni
Modified: 2024-12-04 21:32 UTC (History)
11 users (show)

Fixed In Version: rhosp-openvswitch-3.3-1.el9ost
Doc Type: Bug Fix
Doc Text:
Before this update, links were failing for instances connected directly to an external network. The failure was caused by a delay in OVN performing source network address translation (SNAT) on packets for these instances. Because the IP address for the instance is not translated until OVN pushes the packet, the TCP connection would reset and the link between the instance and the external network was failing. With this update, the bug has been resolved, and the connection between instances and the external network is no longer disrupted.
Clone Of:
Environment:
Last Closed: 2024-11-21 11:30:57 UTC
Target Upstream Version:
Embargoed:
mtomaska: needinfo-

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker   FDP-400 0 None None None 2024-12-04 21:32:09 UTC
Red Hat Issue Tracker OSP-31408 0 None None None 2024-02-09 12:33:10 UTC
Red Hat Knowledge Base (Solution) 7071564 0 None None None 2024-05-23 09:49:32 UTC

Comment 4 Ihar Hrachyshka 2024-02-26 15:03:23 UTC 
This may be the same scenario as described (and probably fixed) here: https://patchwork.ozlabs.org/project/ovn/patch/20240207155627.806188-1-martin.kalcok@canonical.com/
Comment 12 Lon Hohberger 2024-09-10 17:22:40 UTC 
The fix here is to update to a later version of OVN - the rhosp-openvswitch package handles this
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