[Xorp-users] multicast routing and pim-sm on linux 2.6 problems
matt bernstein
mgbernstein at gmail.com
Sat Jun 9 15:25:00 PDT 2007
Hi guys,
I've been desperately trying to get multicast routing working with kernel
2.6 and pim-sm but to no avail. I'm trying to become a listener on an
internal multicast feed but striking out. I am currently using xorp cvs, and
any help is greatly appreciated.
Details of my configuration are as follows.
Topology
[host A 10.49.49.230/28] -- 10.49.49.232/28 [ host B xorp router ]
10.49.49.222/28 -- 10.49.49.210/211 [ cisco hsrp router] -- multicast
networks
Host A is trying to subscribe and recieve data from multicast group
233.76.146.4
RP for the network is 10.48.254.14 via 10.49.49.210/211
real sources servers are 10.49.48.128/27 via 10.49.49.210/211
my routes go to the real ips, not the hsrp ips.
As far as I can tell host A is running igmp v3 on interface eth0 so I
matched igmp v3 on host B eth0. I can see igmp messages being exchanged
between the hosts. Although in the output below the multicast group does not
show up in the igmp groups.
If i run multicast client/server on host A and host B on the same network
they can communicate.
Any help is appreciated, thanks.
The following output is generated by xorp on multicast join from host A,
emcast 233.76.146.4
show pim join
Group Source RP Flags
224.0.1.40 0.0.0.0 10.48.254.14 WC
Upstream interface (RP): eth1
Upstream MRIB next hop (RP): 10.49.49.211
Upstream RPF'(*,G): 10.49.49.211
Upstream state: Joined
Join timer: 13
Local receiver include WC: .O.
Joins RP: ...
Joins WC: ...
Join state: ...
Prune state: ...
Prune pending state: ...
I am assert winner state: ...
I am assert loser state: ...
Assert winner WC: ...
Assert lost WC: ...
Assert tracking WC: .O.
Could assert WC: ...
I am DR: OOO
Immediate olist RP: ...
Immediate olist WC: .O.
Inherited olist SG: .O.
Inherited olist SG_RPT: .O.
PIM include WC: .O.
233.76.146.4 10.49.49.230 10.48.254.14 SG SPT DirectlyConnectedS
Upstream interface (S): eth0
Upstream interface (RP): eth1
Upstream MRIB next hop (RP): 10.49.49.211
Upstream MRIB next hop (S): UNKNOWN
Upstream RPF'(S,G): UNKNOWN
Upstream state: Joined
Register state: RegisterJoin RegisterCouldRegister
Join timer: 6
KAT(S,G) running: true
Local receiver include WC: ...
Local receiver include SG: ...
Local receiver exclude SG: ...
Joins RP: ...
Joins WC: ...
Joins SG: ..O
Join state: ..O
Prune state: ...
Prune pending state: ...
I am assert winner state: ...
I am assert loser state: ...
Assert winner WC: ...
Assert winner SG: ...
Assert lost WC: ...
Assert lost SG: ...
Assert lost SG_RPT: ...
Assert tracking SG: O.O
Could assert WC: ...
Could assert SG: ..O
I am DR: OOO
Immediate olist RP: ...
Immediate olist WC: ...
Immediate olist SG: ..O
Inherited olist SG: ..O
Inherited olist SG_RPT: ...
PIM include WC: ...
PIM include SG: ...
PIM exclude SG: ...
show pim mfc
Group Source RP
233.76.146.4 10.49.49.230 10.48.254.14
Incoming interface : eth0
Outgoing interfaces: ..O
show pim neighbors
Interface DRpriority NeighborAddr V Mode Holdtime Timeout
eth1 1 10.49.49.210 2 Sparse 105 80
eth1 1 10.49.49.211 2 Sparse 105 81
show igmp group
Interface Group Source LastReported Timeout V State
eth0 224.0.0.2 0.0.0.0 10.49.49.232 151 3 E
eth0 224.0.0.13 0.0.0.0 10.49.49.232 151 3 E
eth0 224.0.0.22 0.0.0.0 10.49.49.232 151 3 E
eth1 224.0.0.2 0.0.0.0 10.49.49.222 221 2 E
eth1 224.0.0.13 0.0.0.0 10.49.49.222 225 2 E
eth1 224.0.0.22 0.0.0.0 10.49.49.222 222 2 E
eth1 224.0.1.40 0.0.0.0 10.49.49.210 230 2 E
cat ip_mr_cache
Group Origin Iif Pkts Bytes Wrong Oifs
04924CE9 E631310A 0 2 66 0 2:1
cat ip_mr_vif
Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote
0 eth0 355 11 0 0 00000 E831310A 00000000
1 eth1 64 2 161 5 00000 DE31310A 00000000
2 pimreg 0 0 355 11 00004 E831310A 00000000
rp_filter is 0
mc_forwarding is 1
ip_forwardig is 1
static routes exist to the RP / source subnets
224 subnet on eth0
Xorp is configured on host B as follows:
interfaces {
restore-original-config-on-shutdown: false
interface eth0 {
description: "manage interface"
disable: false
default-system-config
}
interface eth1 {
description: "data interface"
disable: false
default-system-config
}
}
fea {
unicast-forwarding4 {
disable: false
}
}
plumbing {
mfea4 {
disable: false
interface eth0 {
vif eth0 {
disable: false
}
}
interface eth1 {
vif eth1 {
disable: false
}
}
interface register_vif {
vif register_vif {
disable: false
}
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
static {
mrib-route 10.49.48.128/27 {
next-hop: 10.49.49.210
metric: 1
}
mrib-route 10.49.48.128/27 {
next-hop: 10.49.49.211
metric: 2
}
mrib-route 10.48.254.14/32 {
next-hop: 10.49.49.210
metric: 1
}
mrib-route 10.48.254.14/32 {
next-hop: 10.49.49.211
metric: 2
}
}
}
protocols {
igmp {
disable: false
interface eth0 {
vif eth0 {
disable: false
version: 3
}
}
interface eth1 {
vif eth1 {
disable: false
version: 2
}
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
pimsm4 {
disable: false
interface eth0 {
vif eth0 {
disable: false
}
}
interface eth1 {
vif eth1 {
disable: false
/* enable-ip-router-alert-option-check: false */
/* dr-priority: 1 */
/* hello-period: 30 */
/* hello-triggered-delay: 5 */
/* alternative-subnet 10.49.48.128/27 */
}
}
interface register_vif {
vif register_vif {
/* Note: this vif should be always enabled */
disable: false
}
}
static-rps {
rp 10.48.254.14 {
group-prefix 224.0.0.0/4 {
rp-priority: 1
/* hash-mask-len: 30 */
}
}
}
switch-to-spt-threshold {
/* approx. 1K bytes/s (10Kbps) threshold */
disable: false
interval: 100
bytes: 102400
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
fib2mrib {
disable: false
}
}
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