NAT-splithorizon.jpg
[NETVIRT-381] SNAT Traffic from Non-Fip VM of non-primary DPN to FIP of non-primary DPN is dropping Created: 20/Dec/16 Updated: 15/Dec/17 Resolved: 01/Jan/17 |
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| Status: | Resolved |
| Project: | netvirt |
| Component/s: | General |
| Affects Version/s: | Boron |
| Fix Version/s: | None |
| Type: | Bug | ||
| Reporter: | Chetan Arakere Gowdru | Assignee: | Chetan Arakere Gowdru |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Environment: |
Operating System: All |
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| Attachments: |
NAT-splithorizon.jpg
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| External issue ID: | 7409 |
| Description |
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Issue : SNAT Traffic from Non-Fip VM of non-primary DPN to FIP of non-primary DPN is dropping with SNAT flows on different DPN. As per attached topology, when an Non-FIP(VM-131) try to reaches FIP(VM-211), the packet is forwarded to the DPN1->DPN2 and DPN2(Primary-NAPT) has the SNAT flows. After going though the SNAT flows, the packet will be sent back to DPN1 via vxvlan tunnel-port - tunzz. Since the packet entered DPN2 on tunzz and again sent back to same port(out_port == in_port), because of default OVS split-horizon behaiour of split-horizon, the packet is dropped. |
| Comments |
| Comment by Chetan Arakere Gowdru [ 20/Dec/16 ] |
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Attachment NAT-splithorizon.jpg has been added with description: NAT split horizon issue |
| Comment by Chetan Arakere Gowdru [ 31/Dec/16 ] |