[Xorp-users] IGMP and PIM-SSM problem
Jigar
jjajal at gmail.com
Thu Oct 16 23:32:41 PDT 2008
Pavlin Radoslavov wrote:
> Jigar <jjajal at gmail.com> wrote:
>
>
>> I think, I blundered in explaining the setup and the scenario which I
>> want to
>> create.
>> Just scrap the previous one and start with the scratch.
>>
>> Actually, I want to test the following scenario given in RFC-4601
>> (PIM-SM) in
>> section 4.5.7 (Sending (S,G) Join/Prune Messages)
>>
>> #########################################################
>> Transitions from NotJoined State
>> When the upstream (S,G) state machine is in NotJoined state, the
>> following event may trigger a state transition:
>> JoinDesired(S,G) becomes True
>> The macro JoinDesired(S,G) becomes True, e.g., because the
>> downstream state for (S,G) has changed so that at least one
>> interface is in inherited_olist(S,G).
>> The upstream (S,G) state machine transitions to Joined state.
>> Send Join(S,G) to the appropriate upstream neighbor, which is
>> RPF'(S,G). Set the Join Timer (JT) to expire after t_periodic
>> seconds.
>> ##########################################################
>>
>> To generate above scenario, I have used setup as mentioned below.
>>
>>
>>
>> IP address:
>> host A (eth0): 10.100.3.220/24 (IGMPv3 source specific join report
>> sender)
>> host B (eth1): 10.100.3.107/24 (PIM-SM downstream interface)
>> host B (eth0): 192.168.14.212/24 (PIM-SM uptream interface)
>> host C (eth0): 192.168.14.211/24 (configured as static RP on host B)
>>
>> Brief Information about setup:
>> - All machines (host A, host B, and host C) are running RHEL4
>> (kernel-2.6.9).
>> - host A and host C can be treated as packet generator.
>> - host B is running xorp (1.4) with attached configuration
>> (config.boot.pim-sm.cfg)
>> - On host B, i configured host C as static RP for all group (pls see
>> attached
>> config file).
>> - Test generates scenario such that
>> host A becomes IGMP host (as receiver),
>> host B becomes DR (of PIM-SM RPT),
>> and host C becomes RP (of PIM-SM RPT).
>>
>> Steps followed in test:
>> - host C sends PIM-SM hello packet with hold time as 0xffff (infinity)
>> using
>> packet generator utility. So host B assumes that RP is directly
>> connect on its
>> interface eth0. Also it ensures that RP remains always alive.
>> - host A sends IGMPv3 source specific join report using attached
>> application
>> (igmpv3-join-generator.c).
>> IGMP Join report is as following:
>> Multicast Group address: 232.11.22.33
>> Mode: MCAST_INCLUDE
>> No of sources in group: 1
>> Source address: 192.168.18.154
>>
>> Expectation:
>> - As per RFC, host B should generate PIM-SM join(S,G) (here S-192.168.18.154
>> G-232.11.22.33) message on eth0 (upstream interface) after receiving
>> IGMPv3
>> source specific Join message on eth1 (downstream interface).
>>
>> But, I am not getting any PIM-SM join message on eth0 (upstream interface).
>>
>> Also, I have attached status of PIM-SM database on XORP.
>>
>> Can you pls guide me what is going wrong in this test scenario?
>>
>
> Is the source address 192.168.18.158 or 192.168.18.154?
> In the above IGMP Join report it is 192.168.18.154, but in the
> "show pim join" output it is 192.168.18.158.
>
I had a mistake writing down the source address in explanation.
Source address is 192.168.18.158 in IGMP also.
> In any case, the issue seems to be that the RPF'(S,G) toward the
> source is UNKNOWN:
>
> Upstream RPF'(S,G): UNKNOWN
>
> The reason it is UNKNOWN is because the MRIB (as seen by PIM-SM)
> doesn't seem to contain an entry that points toward the source:
>
> Upstream MRIB next hop (S): UNKNOWN
>
> The simplest thing to do is to install a static route for the
> source's subnet, say 192.168.18.0/24, and set host C
> (192.168.14.211) as the next-hop router toward that subnet.
>
> Pavlin
>
Thanks a lot, Pavlin. I got your point and install static route for the
source subnet and it works.
One main thing I was missing was: *PIM JOIN(S,G) is always forwarded or
sent towards the source S.*
Thanks again for your great help, I am sorry for taking your so much of
time.
Jigar Jajal
> P.S. In your particular setup you don't need the policy block.
>
>
>> --------------090900090503060700030800
>> Content-Type: multipart/related;
>> boundary="------------050004070302010302040400"
>>
>>
>> --------------050004070302010302040400
>> Content-Type: text/html; charset=ISO-8859-1
>> Content-Transfer-Encoding: 7bit
>>
>> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
>> <html>
>> <head>
>> </head>
>> <body bgcolor="#ffffff" text="#000000">
>> <small><font face="Verdana">Pavlin,<br>
>> <br>
>> Thanks for your kind reply.<br>
>> <br>
>> I think, I blundered in explaining the setup and the scenario which I
>> want to <br>
>> create.<br>
>> Just scrap the previous one and start with the scratch.<br>
>> <br>
>> Actually, I want to test the following scenario given in RFC-4601
>> (PIM-SM) in<br>
>> section 4.5.7 (Sending (S,G) Join/Prune Messages)<br>
>> <br>
>> #########################################################<br>
>> Transitions from NotJoined State<br>
>> When the upstream (S,G) state machine is in NotJoined state, the<br>
>> following event may trigger a state transition:<br>
>> JoinDesired(S,G) becomes True<br>
>> The macro JoinDesired(S,G) becomes True, e.g., because the<br>
>> downstream state for (S,G) has changed so that at least one<br>
>> interface is in inherited_olist(S,G).<br>
>> The upstream (S,G) state machine transitions to Joined state.<br>
>> Send Join(S,G) to the appropriate upstream neighbor, which is<br>
>> RPF'(S,G). Set the Join Timer (JT) to expire after t_periodic<br>
>> seconds.<br>
>> ##########################################################<br>
>> <br>
>> To generate above scenario, I have used setup as mentioned below.<br>
>> <br>
>> <img alt="" src="cid:part1.01060006.01000201 at gmail.com" height="113"
>> width="483"><br>
>> <br>
>> IP address:<br>
>> host A (eth0): 10.100.3.220/24 (IGMPv3 source specific join report
>> sender)<br>
>> host B (eth1): 10.100.3.107/24 (PIM-SM downstream interface)<br>
>> host B (eth0): 192.168.14.212/24 (PIM-SM uptream interface)<br>
>> host C (eth0): 192.168.14.211/24 (configured as static RP on host B)<br>
>> <br>
>> Brief Information about setup:<br>
>> - All machines (host A, host B, and host C) are running RHEL4
>> (kernel-2.6.9).<br>
>> - host A and host C can be treated as packet generator.<br>
>> - host B is running xorp (1.4) with attached configuration <br>
>> (config.boot.pim-sm.cfg)<br>
>> - On host B, i configured host C as static RP for all group (pls see
>> attached <br>
>> config file).<br>
>> - Test generates scenario such that <br>
>> host A becomes IGMP host (as receiver), <br>
>> host B becomes DR (of PIM-SM RPT), <br>
>> and host C becomes RP (of PIM-SM RPT).<br>
>> <br>
>> Steps followed in test:<br>
>> - host C sends PIM-SM hello packet with hold time as 0xffff (infinity)
>> using <br>
>> packet generator utility. So host B assumes that RP is directly
>> connect on its<br>
>> interface eth0. Also it ensures that RP remains always alive.<br>
>> - host A sends IGMPv3 source specific join report using attached
>> application <br>
>> (igmpv3-join-generator.c). <br>
>> IGMP Join report is as following:<br>
>> Multicast Group address: 232.11.22.33<br>
>> Mode: MCAST_INCLUDE<br>
>> No of sources in group: 1<br>
>> Source address: 192.168.18.154<br>
>> <br>
>> Expectation:<br>
>> - As per RFC, host B should generate PIM-SM join(S,G) (here
>> S-192.168.18.154<br>
>> G-232.11.22.33) message on eth0 (upstream interface) after receiving
>> IGMPv3 <br>
>> source specific Join message on eth1 (downstream interface).<br>
>> <br>
>> But, I am not getting any PIM-SM join message on eth0 (upstream
>> interface).<br>
>> <br>
>> Also, I have attached status of PIM-SM database on XORP.<br>
>> <br>
>> Can you pls guide me what is going wrong in this test scenario?<br>
>> <br>
>> <br>
>> </font></small>
>> </body>
>> </html>
>>
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>> iiigAooooAKKKKACiiigAooooAKKKKACiiigAooooA4/4kzWdv4atZ7m5sbWaPVbF7We9AKR
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>> NXolFAHndz4mni8OXLR+KLRYTqYtbDV7qSKNbtPIWVsTLE0KkP5qbvLIPllMBzvFcXusX/gi
>> 5u28S3Z8jWLYnULN4Hj+zB4fNKzLEqSRKGkZn2KAUdG3KjbvTKKAMvQL22vdLVrTVpNXjRyn
>> 25gmJj1+Vo1VGAztygxlSD8was/x7qttpPgrVHuLm0gkuLeS1tftWzZJO6lUQh/lIJ67vlAB
>> LYUE10lFAHJ+ANTtrjRJtJjkjS50i4ltJLLzUd7SIO3kRuUZgSIgikhm5VgSWVq6yiigAooo
>> oAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACuP8AiTNZ2/hq1nubmxtZo9VsXtZ70ApF
>> ILhCWwSvRN5OCDtDcgZNdhRQB523imRTe6Y3iWMQ2GsCyvNWLQebbwm2MoeQ7fKQmcGHJQDj
>> bjf81Fz4mni8OXLR+KLRYTqYtbDV7qSKNbtPIWVsTLE0KkP5qbvLIPllMBzvHolFAHmYvdYv
>> /BFzdt4luz5GsWxOoWbwPH9mDw+aVmWJUkiUNIzPsUAo6NuVG3dxoF7bXulq1pq0mrxo5T7c
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>> pv5AzVjwCIU03UUtJLSWzW9It5bBBHZyL5UZJt0BYIgYuGAZsyCQ5BJUdZRQAUUUUAFFFFAB
>> RRRQAUUUUAFFFFABRRRQAUUUUAFFFFABXH/Emazt/DVrPc3NjazR6rYvaz3oBSKQXCEtglei
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>> PF4cuWj8UWiwnUxa2Gr3UkUa3aeQsrYmWJoVIfzU3eWQfLKYDnePRKKAPMxe6xf+CLm7bxLd
>> nyNYtidQs3geP7MHh80rMsSpJEoaRmfYoBR0bcqNu7jQL22vdLVrTVpNXjRyn25gmJj1+Vo1
>> VGAztygxlSD8watSigDn/Fn/AB62H2n/AJA/2v8A4mufufZ/Kkxv7+X5nlb+23dv+TfUnheD
>> w5DZXL+GIrRLGa4Lu1kuIHk2IpMePkIwqglONwYH5g1blFABRRRQAUUUUAFFFFABRRRQAUUU
>> UAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFAB
>> RRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUU
>> UAFFFFAH/9k=
>> --------------050004070302010302040400--
>>
>> --------------090900090503060700030800--
>>
>> --------------070003010705090101090701
>> Content-Type: text/plain;
>> name="config.boot.pim-sm.cfg"
>> Content-Transfer-Encoding: 7bit
>> Content-Disposition: inline;
>> filename="config.boot.pim-sm.cfg"
>>
>> /* $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 {
>> unicast-forwarding4 {
>> disable: false
>> forwarding-entries {
>> retain-on-startup: false
>> retain-on-shutdown: false
>> }
>> }
>> }
>>
>> 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 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 {
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> version: 3
>> }
>> }
>> interface eth1 {
>> vif eth1 {
>> disable: false
>> version: 3
>> }
>> }
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> }
>> }
>>
>> protocols {
>> pimsm4 {
>> disable: false
>> interface eth0 {
>> vif eth0 {
>> disable: false
>> /* enable-ip-router-alert-option-check: false */
>> /* dr-priority: 1 */
>> /* hello-period: 30 */
>> /* 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: 1 */
>> /* hello-period: 30 */
>> /* 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
>> }
>> }
>> traceoptions {
>> flag all {
>> disable: false
>> }
>> }
>> static-rps {
>> rp 192.168.14.211 {
>> group-prefix 224.0.0.0/4 {
>> }
>> }
>> }
>> }
>> }
>>
>> /*
>> * Note: fib2mrib is needed for multicast only if the unicast protocols
>> * don't populate the MRIB with multicast-specific routes.
>> */
>> protocols {
>> fib2mrib {
>> disable: false
>> }
>> }
>>
>>
>> --------------070003010705090101090701
>> Content-Type: text/plain;
>> name="xorp-status.txt"
>> Content-Transfer-Encoding: 7bit
>> Content-Disposition: inline;
>> filename="xorp-status.txt"
>>
>> root at localhost.localdomain> show pim join all
>> Group Source RP Flags
>> 224.0.0.0 192.168.14.211 192.168.14.211 RP
>> Upstream interface (RP): eth1
>> Upstream MRIB next hop (RP): 192.168.14.211
>> Upstream state: NotJoined
>> Join timer: -1
>> Joins RP: ...
>> Join state: ...
>> Prune state: ...
>> Prune pending state: ...
>> Could assert WC: ...
>> I am DR: OOO
>> Immediate olist RP: ...
>> Inherited olist SG: ...
>> Inherited olist SG_RPT: ...
>> 232.11.22.33 192.168.18.158 192.168.14.211 SG DirectlyConnectedS
>> Upstream interface (S): eth1
>> Upstream interface (RP): eth1
>> Upstream MRIB next hop (RP): 192.168.14.211
>> Upstream MRIB next hop (S): UNKNOWN
>> Upstream RPF'(S,G): UNKNOWN
>> Upstream state: Joined
>> Register state: RegisterNoinfo RegisterNotCouldRegister
>> Join timer: 1
>> KAT(S,G) running: false
>> Local receiver include WC: ...
>> Local receiver include SG: O..
>> Local receiver exclude SG: ...
>> Joins RP: ...
>> Joins WC: ...
>> Joins SG: ...
>> Join state: ...
>> 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: OO.
>> Could assert WC: ...
>> Could assert SG: ...
>> 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: O..
>> PIM exclude SG: ...
>>
>> --------------070003010705090101090701
>> Content-Type: text/plain; charset="us-ascii"
>> MIME-Version: 1.0
>> Content-Transfer-Encoding: 7bit
>> Content-Disposition: inline
>>
>> _______________________________________________
>> Xorp-users mailing list
>> Xorp-users at xorp.org
>> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users
>>
>> --------------070003010705090101090701--
>>
>
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