Hi again,
I've added this route :
''route add 239.0.1.2/32 172.16.1.1''
But nothing changed.
Is OpenBSD capable of multicast routing? Am I doing a wrong configuration?
Any thoughts?
Thanks in advance.
On Tue, Nov 8, 2022 at 6:28 PM Barbaros Bilek <barbarosblek@gmail.com>
wrote:
> Hi Folks,
>
> I try to do multicast routing with OpenBSD 7.2
> Here is my setup:
>
> # Default GW to internet
> echo 'inet autoconf' > /etc/hostname.em0
> # Get 10.10.12.81/24 from dhcp-server with gw 10.10.12.1
>
> # Multicast Server Interface (transmit packets)
> echo 'inet 172.16.1.1 255.255.255.0 NONE' > /etc/hostname.em1
> # Multicast Client interface (receive packets)
> echo 'inet 172.16.55.1 255.255.255.0 NONE' > /etc/hostname.em2
> # Forward ip & multicast
> echo 'sysctl net.inet.ip.forwarding=1' > /etc/sysctl.conf
> echo 'sysctl net.inet.ip.mforwarding=1' >> /etc/sysctl.conf
> # Enable Multicast on OpenBSD
> rcctl enable multicast
> # Disable PF
> rcctl disable pf
>
> # Mrouted Configuration
> multicast_test# cat /etc/mrouted.conf
> name STD 239.0.0.0/16
> pruning on
> phyint 172.16.1.1 threshold 16
> boundary STD
> altnet 172.16.0.0/16
> phyint 172.16.55.1 threshold 16
> boundary STD
> altnet 172.16.0.0/16
> phyint 10.10.12.81 disable
> # Enable mrouted on startUp
> rcctl enable mrouted
> # Reboot system
> reboot
>
> For testing purposes I use this application : Singlewire Software IC Test
> Multicast (It uses )
> I'm sure about my testing environment. Because when I use a Brocade ICX L3
> switch with router pim configuration everything is ok. But with OpenBSD
> multicast routing fails:
>
> Here some logs :
>
> multicast_test# mrinfo
>
> 127.0.0.1 (localhost) [version 3.8,prune,genid,mtrace]:
>
> 10.10.12.81 -> 0.0.0.0 (local) [1/1/disabled]
>
> 172.16.1.1 -> 0.0.0.0 (local) [1/16/querier/leaf]
>
> 172.16.55.1 -> 0.0.0.0 (local) [1/16/querier/leaf]
>
>
> multicast_test# netstat -g
>
>
> Virtual Interface Table
>
> Vif Thresh Local-Address Remote-Address Pkt_in Pkt_out
>
> 1 16 172.16.1.1 458 0
>
> 2 16 172.16.55.1 0 0
>
>
> Multicast Forwarding Cache
>
> Hash Origin Mcastgroup Traffic In-Vif
> Out-Vifs/Forw-ttl
>
> 0 172.16.1.1 239.0.1.2 458B 1
>
>
> Total no. of entries in cache: 1
>
>
> IPv6 Multicast Interface Table is empty
>
> IPv6 Multicast Routing Table is empty
>
>
> Output when I run mrouted at debug mode :
>
>
> multicast_test# mrouted -dvvvv
>
>
>
>
> mrouted: debug level invalid
>
> debug level 2
>
> 18:06:55.405 mrouted version 3.8
>
> 18:06:55.407 Getting vifs from kernel interfaces
>
> 18:06:55.408 installing em0 (10.10.12.81 on subnet 10.10.12/24) as vif #0
> - rate=0
>
> 18:06:55.408 installing em1 (172.16.1.1 on subnet 172.16.1/24) as vif #1 -
> rate=0
>
> 18:06:55.408 installing em2 (172.16.55.1 on subnet 172.16.55/24) as vif #2
> - rate=0
>
> 18:06:55.408 Getting vifs from /etc/mrouted.conf
>
> 18:06:55.408 Installing vifs in mrouted...
>
> 18:06:55.408 vif #1, phyint 172.16.1.1
>
> 18:06:55.409 vif #2, phyint 172.16.55.1
>
> pruning on
>
> 18:06:55.410 Installing vifs in kernel...
>
> 18:06:55.410 vif #1, phyint 172.16.1.1
>
> 18:06:55.410 vif #2, phyint 172.16.55.1
>
> vifs_with_neighbors = 0
>
>
> Virtual Interface Table
>
> Vif Name Local-Address M Thr Rate
> Flags
>
> 0 em0 10.10.12.81 subnet: 10.10.12/24 1 1 0
> disabled
>
> 18:06:55.411 warning - SIOCGETVIFCNT fails
>
>
> 1 em1 172.16.1.1 subnet: 172.16.1/24 1 16 0
> querier
>
> alternate subnets: 172.16/16
>
> boundaries: 239.0/16
>
> 18:06:55.411 warning - SIOCGETVIFCNT fails
>
>
> 2 em2 172.16.55.1 subnet: 172.16.55/24 1 16 0
> querier
>
> alternate subnets: 172.16/16
>
> boundaries: 239.0/16
>
> 18:06:55.411 warning - SIOCGETVIFCNT fails
>
>
>
> Multicast Routing Table (3 entries)
>
> Origin-Subnet From-Gateway Metric Tmr In-Vif Out-Vifs
>
> 172.16.55/24 1 0 2 1*
>
> 172.16.1/24 1 0 1 2*
>
> 172.16/16 1 0 1 2*
>
>
> 18:07:15.583 update 0 starting at 3 of 3
>
> 18:07:16.593 update 0 starting at 3 of 3
>
> 18:07:17.602 update 0 starting at 3 of 3
>
> 18:07:18.612 update 0 starting at 3 of 3
>
>
> When i watch packets on em1 i can see multicast packets are arriving: (constantly
> increasing...)
>
> multicast_test# tcpdump -nettti em1 host 239.0.1.2
>
> tcpdump: listening on em1, link-type EN10MB
>
> Nov 08 18:19:33.344608 2c:f0:5d:73:f8:c4 01:00:5e:00:01:02 0800 73:
> 172.16.1.2.50665 > 239.0.1.2.20480: udp 31
>
> Nov 08 18:19:34.358455 2c:f0:5d:73:f8:c4 01:00:5e:00:01:02 0800 73:
> 172.16.1.2.50665 > 239.0.1.2.20480: udp 31
>
>
> But at the receiver side (em2) there are no multicast packets transmitted
> by em1
> After a while i saw only one packet as igmp nreport with TTL 1
>
> multicast_test# tcpdump -nettti em2 host 239.0.1.2
>
> tcpdump: listening on em2, link-type EN10MB
>
> Nov 08 18:21:12.994258 2c:f0:5d:73:f8:c3 01:00:5e:00:01:02 0800 60:
> 172.16.55.2 > 239.0.1.2: igmp nreport 239.0.1.2 [ttl 1]
>
>
> I've even tried some igmp/mcast proxies but could not figure out how to
> become a multicast router with my best OS, OpenBSD.
>
> I can not understand what I am doing wrong.
> Thanks and regards.
>
>
>
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