[Xorp-users] communication between IGMP and PIM
Dr Ben G Wu
ben at sparkcomputing.co.uk
Thu Jun 19 09:55:30 PDT 2008
1. I got the same problem. I just found out that i should not use
224.0.0.0/4. I used 239.255.0.0/16 and my simple multicast routing
just starts working!
my network is vlan1 ------ Rotuer ----- vlan2
2. i do not need mrib-route configured in my case. that's that mean
the multicast source will not be known then? I run 'show igmp group'
command i got these:
Interface Group Source LastReported Timeout V State
eth2 239.255.1.10 0.0.0.0 192.168.2.253 227 2 E
The Source is 0.0.0.0. I will try to put mrib-route back to see if the
source ip can be listed correctly
cheers,
Ben
On Thu, Jun 19, 2008 at 4:58 PM, Pavlin Radoslavov
<pavlin at icsi.berkeley.edu> wrote:
> Jigar <jjajal at gmail.com> wrote:
>
>> Please refer following setup....:
>>
>> -- I have a setup of XORP (version 1.4 ) with PIM and IGMP enabled on all
>> PCs. Setup is as shown in figure (PIM_config.jpg)
>> -- I am having H1 which is joined in multicast group 224.0.0.50. It is sending
>> IGMP report for that group with correct interval. This group entry can also be
>> seen on xorpsh through "show igmp group". It is connected to eth0 interface of
>> R2, so group is added for that interface only.
>> -- This means that IGMP is runing fine on my R2. But this group informations
>> should be forwarded by PIM-SM. This is not happening in my setup
>> scenario. PIM-SM router should send JOIN messages towards RP periodically for
>> particular group. I have configured R1 as RP of 224.0.0.0/4 statically.
>> -- I can see that R2 (on eth1) has recognized R1 as its RP in not_joined state.
>> -- I have configured RP as itself in R1.
>>
>> *Is there any configuration missing?*
>
> Multicast group 224.0.0.50 belongs to the link-local multicast
> address space 224.0.0.0 - 224.0.0.255 which are never forwarded by
> multicast routers.
> You should use some other multicast address outside of that range.
>
> FYI, the mrib-route entries should specify unicast prefixes that are
> to be used for the multicast reverse path forwarding check (toward
> the sender or the RP). I.e., a mrib-route entry should not be used
> to specify a multicast group range.
>
> Pavlin
>
>
>> Here I am providing XORP configuration file on *R1 and R2 *for your reference.
>> config.boot file-------> ON R1
>> .................start.................
>>
>> interfaces {
>> restore-original-config-on-shutdown: false
>> interface eth0 {
>> description: "data interface"
>> disable: false
>> default-system-config }
>> }
>>
>> fea {
>> targetname: "fea"
>> unicast-forwarding4 {
>> disable: false
>> forwarding-entries {
>> retain-on-startup: false
>> retain-on-shutdown: false
>> }
>> } }
>>
>> protocols {
>> static {
>> targetname: "static_routes"
>> disable: false
>> /* mrib-route 224.0.0.0/8 {
>> next-hop: 10.100.3.226
>> metric: 1 }*/
>> }
>> }
>>
>> policy {
>> /* Describe connected routes for redistribution */
>> policy-statement connected {
>> term export {
>> from {
>> protocol: "connected"
>> }
>> }
>> }
>> }
>>
>> policy {
>> /* Describe static routes for redistribution */
>> policy-statement static {
>> term export {
>> from {
>> protocol: "static"
>> }
>> }
>> }
>> }
>>
>> plumbing {
>> mfea4 {
>> disable: false
>>
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> }
>> }
>>
>> interface register_vif {
>> vif register_vif {
>> /* Note: this vif should be always enabled */
>> disable: false
>> }
>> }
>>
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> protocols {
>> igmp {
>> targetname: "IGMP"
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> version: 3
>> /* enable-ip-router-alert-option-check: false */
>> query-interval: 15
>> /* query-last-member-interval: 1 */
>> /* query-response-interval: 10 */
>> /* robust-count: 2 */
>> }
>> }
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> protocols {
>> pimsm4 {
>> targetname: "PIMSM_4"
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> /* enable-ip-router-alert-option-check: false */
>> /* dr-priority: 1 */
>> hello-period: 10
>> /* hello-triggered-delay: 5 */
>> /* alternative-subnet 10.40.0.0/16 */
>> }
>> }
>> interface register_vif {
>> vif register_vif {
>> /* Note: this vif should be always enabled */
>> disable: false
>> }
>> }
>>
>> static-rps {
>> rp 10.100.3.225 {
>> group-prefix 224.0.0.0/4 {
>> /* rp-priority: 192 */
>> /* 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
>> }
>> }
>> }
>> }
>>
>> /*
>> * Note: fib2mrib is needed for multicast only if the unicast protocols
>> * don't populate the MRIB with multicast-specific routes.
>> */
>> protocols {
>> fib2mrib {
>> disable: false
>> }
>> }
>>
>> .................end.................
>>
>>
>> config.boot file-------> ON R2
>> .................start.................
>> /* $XORP: xorp/rtrmgr/config.boot.sample,v 1.46 2007/03/12 10:16:05 atanu Exp
>> $ */
>>
>>
>> interfaces {
>> restore-original-config-on-shutdown: false
>> interface eth0 {
>> description: "data interface"
>> disable: false
>> default-system-config
>> }
>>
>> interface eth1 {
>> description: "data interface"
>> disable: false
>> default-system-config
>> }
>> }
>>
>> fea {
>> targetname: "fea"
>> unicast-forwarding4 {
>> disable: false
>> forwarding-entries {
>> retain-on-startup: false
>> retain-on-shutdown: false
>> }
>> } }
>> /*
>> protocols {
>> ip {
>> interface eth0 {
>> vif eth0 {
>> address 192.168.1.10 {
>> disable: false
>> }
>> }
>> }
>>
>> interface eth1 {
>> vif eth1 {
>> address 10.100.3.226 {
>> disable: false
>> }
>> }
>> }
>> }
>> }
>>
>> */
>>
>>
>> protocols {
>> static {
>> targetname: "static_routes"
>> disable: false
>> /*
>> mrib-route 224.0.0.0/4 {
>> next-hop: 192.168.1.10
>> metric: 1
>> }
>>
>> mrib-route 10.100.3.0/8 {
>> next-hop: 10.100.3.1
>> metric: 1
>> }
>> */ }
>>
>> }
>>
>> policy {
>> policy-statement connected {
>> term export {
>> from {
>> protocol: "connected"
>> }
>> }
>> }
>> }
>>
>>
>> policy {
>> policy-statement static {
>> term export {
>> from {
>> protocol: "static"
>> }
>> }
>> }
>> }
>>
>>
>>
>>
>> plumbing {
>> mfea4 {
>> disable: false
>>
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> }
>> }
>>
>> interface eth1 {
>> vif eth1 {
>> disable: false
>> }
>> }
>>
>> interface register_vif {
>> vif register_vif {
>> /* Note: this vif should be always enabled */
>> disable: false
>> }
>> }
>>
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> protocols {
>> igmp {
>> targetname: "IGMP"
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> version: 3
>> /* enable-ip-router-alert-option-check: false */
>> query-interval: 15
>> /* query-last-member-interval: 1 */
>> /* query-response-interval: 10 */
>> /* robust-count: 2 */
>> }
>> }
>>
>> interface eth1 {
>> vif eth1 {
>> disable: false
>> version: 3
>> /* enable-ip-router-alert-option-check: false */
>> query-interval: 15
>> /* query-last-member-interval: 1 */
>> /* query-response-interval: 10 */
>> /* robust-count: 2 */
>> }
>> } traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> protocols {
>> pimsm4 {
>> targetname: "PIMSM_4"
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> /* enable-ip-router-alert-option-check: false */
>> dr-priority: 200
>> hello-period: 10
>> /* hello-triggered-delay: 5 */
>> /* alternative-subnet 10.40.0.0/16 */
>> }
>> }
>>
>> interface eth1 {
>> vif eth1 {
>> disable: false
>> /* enable-ip-router-alert-option-check: false */
>> dr-priority: 200
>> hello-period: 10
>> /* hello-triggered-delay: 5 */
>> /* alternative-subnet 10.40.0.0/16 */
>> }
>> }
>>
>> interface register_vif {
>> vif register_vif {
>> /* Note: this vif should be always enabled */
>> disable: false
>> }
>> }
>>
>> static-rps {
>>
>> rp 10.100.3.225 {
>> group-prefix 224.0.0.0/4 {
>> }
>> }
>> }
>>
>> switch-to-spt-threshold {
>> /* approx. 1K bytes/s (10Kbps) threshold */
>> disable: false
>> interval: 100
>> bytes: 102400
>> }
>>
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> /*
>> * Note: fib2mrib is needed for multicast only if the unicast protocols
>> * don't populate the MRIB with multicast-specific routes.
>> */
>> protocols {
>> fib2mrib {
>> disable: true
>> }
>> }
>> .................end.................
>> _______________________________________________
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>
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--
Dr. Ben G Wu, Ph.D, B. Eng, M.BCS
5 Dargate, Shrewsbury, Shropshire, SY3 9QE, UK
T: +44(0)1743 290009
M: +44(0) 7980546757
F: +44(0)7092 861166
W: http://www.sparkcomputing.co.uk
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