Date: Wed, 01 Dec 2004 09:12:55 +0800 From: =?gb2312?B?1dQgz/7OxA==?= <zhao_xiaowen@hotmail.com> To: freebsd-net@freebsd.org Subject: pim6sd ipv6 mulitcast routing problem! Message-ID: <BAY16-F17963581241018618B0EACEFBF0@phx.gbl>
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Hi everybody:
I'm setting up a Freebsd router box to perform ipv6 unicast & multicast
routing, but I cannot make multicast routing work. Unicast routing just
works well.
The router box is set up as follow:
1) FreeBSD 5.2.1 with kame-20041101-freebsd521-snap;
2) Quagga (zebra) 0.96.5 for ipv6 unicast routing;
3) Pim6sd for ipv6 multicast routing (use the default pim6sd.conf).
The router box has 3 ethernet interfaces, each of them are connect to a
separate subnet:
bsdrouter# ifconfig
xl0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet6 fe80::201:3ff:fe26:8bba%xl0 prefixlen 64 scopeid 0x1
inet6 2001:250:3003:240::1 prefixlen 64
xl1: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet6 fe80::201:3ff:fee2:1dc3%xl1 prefixlen 64 scopeid 0x2
inet6 2001:250:3003:202::1 prefixlen 64
vr0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::20d:88ff:fe4a:d970%vr0 prefixlen 64 scopeid 0x3
inet6 2001:250:3003:250::1 prefixlen 64
After finishing the configuration of BSD router, I then use Robust Audio
Tool (RAT) to test ipv6 multicast routing. 3 RAT user from the foresaid
subnet, joining the multicast group "ff1e::240:100". But it seems that the
router dose not forward multicast packet from an interface to others.
tcpdump and pim6stat indicate that MLD message between router and host
works with no problem. But the routing table is empty! The following is the
ouput of "pim6stat" command:
PIM Neighbor List
Mif PhyIF Address Timer
MLD Querier List
Mif PhyIF Address Timer Last
0 xl0 fe80::201:3ff:fe26:8bba 255 1h7m27s
1 xl1 fe80::201:3ff:fee2:1dc3 255 1h7m27s
2 vr0 fe80::20d:88ff:fe4a:d970 255 1h7m27s
Reported MLD Group
Mif PhyIF
Group(Group-Timer,MLD-ver(Filter-Mode,Compat-Timer))/Source(TimerID)
0 xl0 ff1e::240:100 (#897 (v1 EX #0))
(any source) (-)
1 xl1 ff1e::240:100 (#894 (v1 EX #0))
(any source) (-)
2 vr0 ff1e::240:100 (#896 (v1 EX #0))
(any source) (-)
Multicast Routing Table
Source Group RP-addr Flags
--------------------------(*,*,RP)--------------------------
Number of Groups: 0
Number of Cache MIRRORs: 0
---------------------------RP-Set----------------------------
"pim6stat -s" shows that "forwarding cache miss" occur on every interface.
The following is the ouput of "pim6stat -s":
bsdrouter# /usr/local/v6/sbin/pim6stat -s
pim6sd per-interface statistics
Mif=0, PhyIF=xl0
139 pim6 hello sent
38 MLD report received
2 MLD done received
38 MLD query sent
1452 forwarding cache miss
1452 forwarding cache miss and not created
Mif=1, PhyIF=xl1
139 pim6 hello sent
37 MLD report received
2 MLD done received
38 MLD query sent
1163 forwarding cache miss
1163 forwarding cache miss and not created
Mif=2, PhyIF=vr0
139 pim6 hello sent
6 MLD report received
34 MLD query sent
1071 forwarding cache miss
1071 forwarding cache miss and not created
"netstat -gs" also says "multicast forwarding cache misses":
bsdrouter# netstat -gs
netstat: sysctl: net.inet.ip.mrtstat: No such file or directory
No IPv4 multicast routing compiled into this system.
IPv6 multicast forwarding:
22110 multicast forwarding cache lookups
22110 multicast forwarding cache misses
2937 upcalls to mrouted
15683 upcall queue overflows
0 upcalls dropped due to full socket buffer
2936 cache cleanups
22110 datagrams with no route for origin
0 datagrams arrived with bad tunneling
So, what's wrong with my setup? How can I correct it and make ipv6
multicast routing work?
Thanks!
Vincent
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