Bug 1887333

Summary: Too many resubmits for IPv6 RS coming from "external" network
Product: Red Hat Enterprise Linux Fast Datapath Reporter: Dumitru Ceara <dceara>
Component: ovn2.13Assignee: OVN Team <ovnteam>
Status: NEW --- QA Contact: Jianlin Shi <jishi>
Severity: medium Docs Contact:
Priority: medium    
Version: FDP 20.ECC: ctrautma, jishi, ralongi
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Dumitru Ceara 2020-10-12 07:13:52 UTC 
Description of problem:

Currently OVN limits forwarding ARP/IPv6 NS packets only to router ports that own the target IP.

This should be extended for other types of BUM (broadcast/unknown/multicast) traffic as follows:

1. send ARP/NS packets only to router ports that own the target IP address.
2. flood IPv6 ND RS packets only to router ports with IPv6 addresses
configured and ipv6_ra_configs.address_mode set.
3. according to the logical switch multicast configuration either flood
unkown IP multicast or forward it only to hosts that registered for the
IP multicast group.
4. flood all other BUM traffic on all logical ports of a logical switch except router ports.

Version-Release number of selected component (if applicable):
any

Additional info:
Reported upstream: - https://mail.openvswitch.org/pipermail/ovs-discuss/2020-September/050715.html