Bug 2028981
| Summary: | [RFE] Support multicasting (static forwarding) in OVN interconnection | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux Fast Datapath | Reporter: | Numan Siddique <nusiddiq> |
| Component: | OVN | Assignee: | Dumitru Ceara <dceara> |
| Status: | CLOSED UPSTREAM | QA Contact: | ying xu <yinxu> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | high | ||
| Version: | FDP 21.K | CC: | ctrautma, dceara, jiji, mmichels |
| Target Milestone: | --- | Keywords: | FutureFeature |
| Target Release: | FDP 22.C | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | ovn22.03-22.03.0-7.el8fdp | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2025-02-10 04:00:49 UTC | 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
Numan Siddique
2021-12-03 21:49:54 UTC
Not necessarily a full solution but in order to support static IP multicast flooding across IC AZs we need: http://patchwork.ozlabs.org/project/ovn/list/?series=281827&state=* Bug 2042952 has been opened to implement "dynamic" multicast support (with IGMP/MLD) in OVN-IC deployments. We'll continue to use the current bug to track support for "static" multicast support (with static multicast flooding) in OVN-IC deployments. Updating the title accordingly. Feature available in ovn22.03-22.03.0-7.el8fdp verified on version:
# rpm -qa|grep ovn
ovn22.03-host-22.03.0-9.el8fdp.x86_64
ovn22.03-22.03.0-9.el8fdp.x86_64
ovn22.03-central-22.03.0-9.el8fdp.x86_64
set env as below:
az2:
# ovn-nbctl show
switch cc5a80c8-c520-4942-b9ba-2ec053ea6b52 (ts1)
port ts1-lr1
type: remote
addresses: ["aa:aa:aa:aa:aa:01 169.254.100.1/24"]
port ts1-lr2
type: router
router-port: lr2-ts1
switch 8f7f9c2b-4b87-42a5-b2bf-0c469568aec3 (ls2)
port ls2-lr2
type: router
addresses: ["00:00:00:00:02:00"]
router-port: lr2-ls2
port ls2p1
addresses: ["00:00:00:00:02:01 172.16.2.1 172:16:2::1"]
port ls2p2
addresses: ["00:00:00:00:02:02 172.16.2.2 172:16:2::2"]
router 537c45e9-0e43-4e55-b011-7091c92793cc (lr2)
port lr2-ts1
mac: "aa:aa:aa:aa:aa:02"
networks: ["169.254.100.2/24"]
gateway chassis: [hv1]
port lr2-ls2
mac: "00:00:00:00:02:00"
networks: ["172.16.2.254/24", "172:16:2::a/64"]
az1:
# ovn-nbctl show
switch f9e7fb44-6310-4280-a71f-59bc4212075a (ls1)
port ls1p1
addresses: ["00:00:00:00:01:01 172.16.1.1 172:16:1::1"]
port ls1-lr1
type: router
router-port: lr1-ls1
port ls1p2
addresses: ["00:00:00:00:01:02 172.16.1.2 172:16:1::2"]
switch 4c33b8fd-8f86-459d-be06-2acb556e45d7 (ts1)
port ts1-lr1
type: router
router-port: lr1-ts1
port ts1-lr2
type: remote
addresses: ["aa:aa:aa:aa:aa:02 169.254.100.2/24"]
router 20c8fdeb-4325-4681-8f03-36732ea985a3 (lr1)
port lr1-ls1
mac: "00:00:00:00:01:00"
networks: ["172.16.1.254/24", "172:16:1::a/64"]
port lr1-ts1
mac: "aa:aa:aa:aa:aa:01"
networks: ["169.254.100.1/24"]
gateway chassis: [hv0]
on az1:
ovn-nbctl set logical_switch ls1 other_config:mcast_snoop="true" other_config:mcast_flood_unregistered="true"
ovn-nbctl set logical_router lr1 options:mcast_relay="true"
ovn-nbctl set logical_router_port lr1-ls1 options:mcast_flood="true"
on az2:
ovn-nbctl set logical_switch ls2 other_config:mcast_snoop="true" other_config:mcast_flood_unregistered="true"
ovn-nbctl set logical_router lr2 options:mcast_relay="true"
ovn-nbctl set logical_router_port lr2-ts1 options:mcast_flood="true"
then ,send multicast packets from ls2p1 to ls1p1:
#! /usr/bin/python
import sys
from scapy.all import *
def main():
# query
sendp(Ether(src="00:00:00:00:02:01", dst="01:00:5e:00:01:44")/IP(src="172.16.2.1", dst="239.0.1.68", proto=17)/('a'*128) , iface="ls2p1")
if __name__ == "__main__":
main()
tcpdump on ls1p1:
# ip netns exec ls1p1 tcpdump -i any -nnle
21:19:09.385327 M 00:00:00:00:01:00 ethertype IPv4 (0x0800), length 164: 172.16.2.1.24929 > 239.0.1.68.24929: UDP, bad length 24921 > 120
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