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Bug
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Resolution: Done-Errata
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Undefined
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None
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None
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None
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2
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False
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False
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ovn25.03-25.03.0-68.el9fdp
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rhel-9
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None
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rhel-net-ovn
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ssg_networking
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OVN FDP 25.D
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1
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+
Problem Description: Clearly explain the issue.
With the following topology:
dnl lr-int (with NAT/LB configured) dnl | dnl ls-int dnl | dnl lr-bgp (advertises routes for all neighbor dnl | router NAT/LB IPs) dnl | dnl +-------+-------+-------+-------+ (direct - peer - router connections) dnl | | | | | dnl lr-ext1 lr-ext2 lr-ext3 lr-ext4 lr-ext5 (with NAT/LB configured)
lr-bgp is configured to advertise all NAT/LB IPs owned by its neighbour routers (lr-int, lr-ext[1-5]).
In reality, when iterating through the ports of lr-bgp, ovn-northd stops after it processed the first peer port (direct router connection) potentially skipping the rest and failing to advertise all required IPs.
Impact Assessment: Describe the severity and impact (e.g., network down,availability of a workaround, etc.).
Incorrect routing, blackholing of traffic with BGP, no workaround.
Software Versions: Specify the exact versions in use (e.g.,openvswitch3.1-3.1.0-147.el8fdp).
ovn25.03-25.03.0-56.el9fdp (or any older ovn25.03)
Issue Type: Indicate whether this is a new issue or a regression (if a regression, state the last known working version).
This is a new issue.
Reproducibility: Confirm if the issue can be reproduced consistently. If not, describe how often it occurs.
Consistently reproducible.
Reproduction Steps: Provide detailed steps or scripts to replicate the issue.
The following OVN unit test reproduces the issue consistently:
OVN_FOR_EACH_NORTHD_NO_HV([ AT_SETUP([dynamic-routing - NAT/LB sync - different peer types]) ovn_startdnl lr-int (with NAT/LB configured) dnl | dnl ls-int dnl | dnl lr-bgp (advertises routes for all neighbor dnl | router NAT/LB IPs) dnl | dnl +-------+-------+-------+-------+ (direct - peer - router connections) dnl | | | | | dnl lr-ext1 lr-ext2 lr-ext3 lr-ext4 lr-ext5 (with NAT/LB configured) check ovn-nbctl \ -- lr-add lr-int \ -- set logical_router lr-int options:chassis=hv1 \ -- lrp-add lr-int lrp-int 00:00:00:00:00:01 10.0.0.1/24 \ -- lr-nat-add lr-int dnat_and_snat 10.0.0.42 1.1.1.1 \ -- lb-add lb-int 30.0.0.1 1.1.1.1 \ -- lr-lb-add lr-int lb-int \ -- ls-add ls-int \ -- lsp-add ls-int lsp-internal \ -- lsp-set-type lsp-internal router \ -- lsp-set-options lsp-internal router-port=lrp-int \ -- lsp-set-addresses lsp-internal router \ -- lsp-add ls-int lsp-bgp \ -- lsp-set-type lsp-bgp router \ -- lsp-set-options lsp-bgp router-port=lrp-bgp-internal \ -- lsp-set-addresses lsp-bgp router \ -- lr-add lr-bgp \ -- set logical_router lr-bgp options:chassis=hv1 \ -- lrp-add lr-bgp lrp-bgp-internal 00:00:00:00:00:02 10.0.0.2/24 n_ext_rtrs=5 for i in $(seq $n_ext_rtrs); do check ovn-nbctl \ -- lrp-add lr-bgp lrp-bgp-ext-$i 00:00:00:00:01:0$i 2$i.0.0.1/24 \ -- lr-add lr-ext-$i \ -- set logical_router lr-ext-$i options:chassis=hv1 \ -- lrp-add lr-ext-$i lrp-ext-$i 00:00:00:00:02:0$i 2$i.0.0.2/24 \ -- set Logical_Router_Port lrp-bgp-ext-$i peer=lrp-ext-$i \ -- set Logical_Router_Port lrp-ext-$i peer=lrp-bgp-ext-$i \ -- lr-nat-add lr-ext-$i dnat_and_snat 2$i.0.0.42 2.2.2.2 \ -- lb-add lb-ext-$i 3$i.0.0.1 2.2.2.2 \ -- lr-lb-add lr-ext-$i lb-ext-$i done check ovn-nbctl --wait=sb syncdnl Dynamic routing disabled, no routes should be advertised. check_row_count Advertised_Route 0 dnl Enable dynamic routing on lr-bgp. It should advertise NATs from both dnl lr-int and lr-exts. check ovn-nbctl --wait=sb \ -- set logical_router lr-bgp option:dynamic-routing=true \ option:dynamic-routing-redistribute=nat,lb dnl Expect two routes to be advertised for lr-int and two routes to be dnl advertised for each lr-ext. n_advertised_routes=$((2 * ($n_ext_rtrs + 1))) check_row_count Advertised_Route $n_advertised_routes AT_CLEANUP ])
Expected Behavior: Describe what should happen under normal circumstances.
NAT/LB IPs of all neighbor routers should be advertised in this case.
Observed Behavior: Explain what actually happens.
Depending on the order in the hash map used for storing lr-bgp ports in ovn-northd, some of the routes are missing.
Troubleshooting Actions: Outline the steps taken to diagnose or resolve the issue so far.
N/A
Logs: If you collected logs please provide them (e.g. sos report, /var/log/openvswitch/* , testpmd console)
N/A
- is cloned by
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- Verified
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- Closed
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- links to
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RHBA-2025:150947
ovn25.03 bug fix and enhancement update
