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 <barbarosb...@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. > > >
