[Xorp-users] IPv6 multicast traffic does not pass
Шинкарук Дмитрий
dimashink at gmail.com
Tue May 5 08:38:14 PDT 2015
To: xorp-users at xorp.org
Hello,
I am trying to make xorp ipv6 multicast routing work with the following
network configuration:
Sender (2001::1) ------ (2001::2) xorp_router_1 (2002::1) ------- (2002::2)
xorp_router_2 (2003::1) ------ Receiver (2003::2)
Sender and receiver use multicast test tools for sending and receiving
multicast traffic respectively.
Multicast group is ff08::2:1.
I can see on sender interface with tcpdump:
19:20:03.123399 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 16
19:20:04.127054 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 16
19:20:05.129661 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 16
19:20:06.133316 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 16
19:20:07.137012 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 17
19:20:08.141263 IP6 2001::1.50909 > ff08::2:1.5004: UDP, length 16
and so on...
Every xorp_router has similar XORP configuration files:
interfaces {
interface "eth5" {
default-system-config
}
interface "eth3" {
default-system-config
}
interface "eth4" {
default-system-config
}
}
fea {
unicast-forwarding4 {
disable: true
}
unicast-forwarding6 {
disable: true
}
}
plumbing {
mfea6 {
disable: false
interface "eth5" {
vif "eth5" {
disable: false
}
}
interface "eth4" {
vif "eth4" {
disable: false
}
}
interface register_vif {
vif register_vif {
disable: false
}
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
mld {
disable: false
interface "eth5" {
vif "eth5" {
}
}
interface "eth4" {
vif "eth4" {
}
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
pimsm6 {
disable: false
interface "eth5" {
vif "eth5" {
}
}
interface "eth4" {
vif "eth4" {
}
}
interface register_vif {
vif register_vif {
disable: false
}
}
static-rps {
rp 2002::1 {
group-prefix ff00::/8 {
}
}
}
traceoptions {
flag all {
disable: false
}
}
}
}
protocols {
fib2mrib {
disable: false
}
}
When I start stream sender and receiver I can see following output on
routers:
For XORP_ROUTER_1
root at xorp_router_1> show pim6 join
Group Source RP Flags
ff08::2:1 :: 2002::1 WC
Upstream interface (RP): register_vif
Upstream MRIB next hop (RP): UNKNOWN
Upstream RPF'(*,G): UNKNOWN
Upstream state: Joined
Join timer: 8
Local receiver include WC: ....
Joins RP: ....
Joins WC: .O..
Join state: .O..
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.O
Could assert WC: .O..
I am DR: .OOO
Immediate olist RP: ....
Immediate olist WC: .O..
Inherited olist SG: .O..
Inherited olist SG_RPT: .O..
PIM include WC: ....
root at xorp_router_1> show pim6 mfc
Group Source RP
root at xorp_router_1> show mfea6 dataflow
Group Source
root at xorp_router_1> show mld group
Interface Group Source LastReported Timeout V State
eth4 ff02::2 :: fe80::a00:27ff:fe18:f206
34 1 E
eth4 ff02::16 :: fe80::a00:27ff:fe18:f206
160 1 E
root at xorp_router_1> show pim6 neighbors
Interface DRpriority NeighborAddr V Mode Holdtime Timeout
eth6 1 fe80::a00:27ff:fe5a:dc05 2 Sparse 105 72
2002::1
root at xorp_router_1:~# ip -6 ro
2002::/64 dev eth6 proto kernel metric 256
2003::/64 dev eth4 proto kernel metric 256
fe80::/64 dev eth3 proto kernel metric 256
fe80::/64 dev eth4 proto kernel metric 256
fe80::/64 dev eth6 proto kernel metric 256
For XORP_ROUTER_2
root at xorp_router_2> show pim6 join
Group Source RP Flags
ff08::2:1 :: 2002::1 WC
Upstream interface (RP): eth6
Upstream MRIB next hop (RP): fe80::a00:27ff:fe5a:dc05
Upstream RPF'(*,G): fe80::a00:27ff:fe5a:dc05
Upstream state: Joined
Join timer: 28
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.O.
Could assert WC: .O...
I am DR: .O..O
Immediate olist RP: .....
Immediate olist WC: .O...
Inherited olist SG: .O...
Inherited olist SG_RPT: .O...
PIM include WC: .O...
root at xorp_router_2> show pim6 mfc
Group Source RP
root at xorp_router_2> show mfea6 dataflow
Group Source
root at xorp_router_2> show mld group
Interface Group Source LastReported Timeout V State
eth4 ff08::2:1 :: fe80::a00:27ff:fea8:6cb1
199 1 E
eth6 ff02::2 :: fe80::a00:27ff:fe5a:dc05
199 1 E
eth6 ff02::d :: fe80::a00:27ff:fe5a:dc05
75 1 E
root at xorp_router_2> show pim6 neighbors
Interface DRpriority NeighborAddr V Mode Holdtime Timeout
eth4 1 fe80::a00:27ff:fe18:f206 2 Sparse 105 98
2002::2
root at xorp_router_2:~# ip -6 ro
2001::/64 dev eth5 proto kernel metric 256
2002::/64 dev eth4 proto kernel metric 256
fe80::/64 dev eth3 proto kernel metric 256
fe80::/64 dev eth4 proto kernel metric 256
fe80::/64 dev eth5 proto kernel metric 256
Moreover, on xorp_router_2 in logs I can see records like this:
--------------Skipped lines--------------------
[ 2015/05/05 18:34:20.999718 WARNING xorp_rtrmgr:1855 XrlFinderTarget
obj/x86_64-unknown-linux-gnu/xrl/targets/finde
r_base.cc:1135 handle_finder_0_2_resolve_xrl ] Handling method for
finder/0.2/resolve_xrl failed: XrlCmdError 102 Com
mand failed Target "policy" does not exist or is not enabled.
[ 2015/05/05 18:34:20.999818 WARNING xorp_rtrmgr:1855 RTRMGR
rtrmgr/task.cc:215 xrl_done ] Failed to receive reply,
code: 201 Resolve failed retries: 0 max_retries: 30
[ 2015/05/05 18:34:21.22377 TRACE xorp_mld MLD6IGMP ] mld6igmp_process: RX
MLD_LISTENER_REPORT from fe80::a00:27ff:f
ea8:6cb1 to ff08::2:1 on vif eth4
[ 2015/05/05 18:34:21.22445 TRACE xorp_mld MLD6IGMP ] Notify routing add
membership for (::, ff08::2:1) on vif eth4
[ 2015/05/05 18:34:21.22540 TRACE xorp_mld MLD6IGMP ] mld6igmp_process: RX
MLD_LISTENER_REPORT from fe80::a00:27ff:f
ea8:6cb1 to ff08::2:1 on vif eth4
[ 2015/05/05 18:34:21.23264 TRACE xorp_pimsm6 PIM ] Add membership for (::,
ff08::2:1) on vif eth4
[ 2015/05/05 18:34:21.23373 WARNING xorp_pimsm6 PIM ] JoinDesired(*,G) =
true: upstream neighbor for RP 2002::1 for g
roup ff08::2:1: not found
[ 2015/05/05 18:34:21.275210 TRACE xorp_pimsm6 PIM ] pim_send: TX PIM_HELLO
from fe80::a00:27ff:fe67:41dc to ff02::d
on vif eth4
[ 2015/05/05 18:34:22.2297 INFO xorp_rtrmgr:1855 RTRMGR
rtrmgr/module_manager.cc:101 execute ] Executing module: fib
2mrib (xorp_fib2mrib)
[ 2015/05/05 18:34:22.3574 WARNING xorp_rtrmgr:1855 XrlFinderTarget
obj/x86_64-unknown-linux-gnu/xrl/targets/finder_
base.cc:1135 handle_finder_0_2_resolve_xrl ] Handling method for
finder/0.2/resolve_xrl failed: XrlCmdError 102 Comma
nd failed Target "fib2mrib" does not exist or is not enabled.
[ 2015/05/05 18:34:22.3801 WARNING xorp_rtrmgr:1855 RTRMGR
rtrmgr/task.cc:215 xrl_done ] Failed to receive reply, co
de: 201 Resolve failed retries: 0 max_retries: 30
--------------Skipped lines--------------------
What's wrong with this configuration? I had before problems in ipv4
multicast, solution there was in dropping rp_filter flags.
Are there any special flags or actions that should be done to make
multicast traffic pass?
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