<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi Donald,<br/>
<br/>
Thank you very much for your feedback.<br/>
<br/>
> SSM should work, configure the interface(s) with `ip pim ssm` and make<br/>
> sure you have a ssm range specified via the `ip pim ssm prefix-list<br/>
> <plistname>` if doing beyond the default SSM range.<br/>
<br/>
Under the interface configuration I can only typ "ip pim sm" for the sparse mode.<br/>
Do you mean this or do I have a missing option 'ip pim ssm'?<br/>
<br/>
For a better understandig, my topology are two centos 7 linux hosts. One sitting int 'Colo1' [10.190.0.22] and one in 'Colo2' [10.55.0.33]. They have a direct MPLS link. This Link is Ipsec encapsulated (Strongswan) and has a GRE Interface for Multicast support. Each Linux Host is connected via Layer 3 Transferlink (BGP Relation) to the inside LAN Arista Switches, where the multicast sender and receiver are connected.<br/>
All switches are PIM-SM SSM enabled.<br/>
<br/>
Currently the receiver is in Colo1 [10.190.0.22] and the sender in Colo2 [10.55.0.33]<br/>
<br/>
<br/>
>`show ip multicast`<br/>
<br/>
Colo1:<br/>
-----<br/>
<br/>
Mroute socket descriptor: 7(Default-IP-Routing-Table)<br/>
Mroute socket uptime: 19:50:34<br/>
<br/>
Zclient update socket: 10 failures=0<br/>
Zclient lookup socket: 13 failures=0<br/>
<br/>
Maximum highest VifIndex: 31<br/>
<br/>
Upstream Join Timer: 60 secs<br/>
Join/Prune Holdtime: 210 secs<br/>
PIM ECMP: Disable<br/>
PIM ECMP Rebalance: Disable<br/>
<br/>
RPF Cache Refresh Delay: 50 msecs<br/>
RPF Cache Refresh Timer: 0 msecs<br/>
RPF Cache Refresh Requests: 2<br/>
RPF Cache Refresh Events: 2<br/>
RPF Cache Refresh Last: 00:52:38<br/>
Nexthop Lookups: 7<br/>
Nexthop Lookups Avoided: 0<br/>
<br/>
Scan OIL - Last: 00:52:38 Events: 2<br/>
MFC Add - Last: 00:00:24 Events: 5<br/>
MFC Del - Last: 00:00:56 Events: 2<br/>
<br/>
Interface Address ifi Vif PktsIn PktsOut BytesIn BytesOut<br/>
Colo1:Colo2 172.21.21.75 16 0 0 0 0 0<br/>
ens4f1.308 172.22.190.10 12 1 0 0 0 0<br/>
<br/>
<br/>
Colo2:<br/>
-----<br/>
<br/>
Mroute socket descriptor: 7(Default-IP-Routing-Table)<br/>
Mroute socket uptime: 46:01:22<br/>
<br/>
Zclient update socket: 10 failures=0<br/>
Zclient lookup socket: 13 failures=0<br/>
<br/>
Maximum highest VifIndex: 31<br/>
<br/>
Upstream Join Timer: 60 secs<br/>
Join/Prune Holdtime: 210 secs<br/>
PIM ECMP: Disable<br/>
PIM ECMP Rebalance: Disable<br/>
<br/>
RPF Cache Refresh Delay: 50 msecs<br/>
RPF Cache Refresh Timer: 0 msecs<br/>
RPF Cache Refresh Requests: 16<br/>
RPF Cache Refresh Events: 13<br/>
RPF Cache Refresh Last: 19:40:22<br/>
Nexthop Lookups: 743<br/>
Nexthop Lookups Avoided: 0<br/>
<br/>
Scan OIL - Last: 19:40:22 Events: 13<br/>
MFC Add - Last: --:--:-- Events: 0<br/>
MFC Del - Last: 00:02:32 Events: 371<br/>
<br/>
Interface Address ifi Vif PktsIn PktsOut BytesIn BytesOut<br/>
Colo2:Colo1 172.21.21.76 21 0 0 0 0 0<br/>
eth0 172.24.37.3 2 0 0 0 0 0<br/>
pimreg 0.0.0.0 45 0 0 0 0 0<br/>
<br/>
>`show ip pim upstream`<br/>
<br/>
Colo1:<br/>
-----<br/>
<br/>
Iif Source Group State Uptime JoinTimer RSTimer KATimer RefCnt<br/>
Colo1:Colo210.55.0.33 232.122.14.42 J 00:01:00 00:00:40 --:--:-- --:--:-- 1<br/>
<br/>
Colo2:<br/>
-----<br/>
<br/>
Iif Source Group State Uptime JoinTimer RSTimer KATimer RefCnt<br/>
eth0 10.55.0.33 232.122.14.42 J 00:02:35 00:00:04 --:--:-- --:--:-- 1<br/>
<br/>
>`show ip mroute`<br/>
<br/>
Colo1:<br/>
-----<br/>
<br/>
Source Group Proto Input Output TTL Uptime<br/>
10.55.0.33 232.122.14.42 PIM Colo1:Colo2 ens4f1.308 1 00:01:24<br/>
<br/>
Colo2:<br/>
-----<br/>
<br/>
Source Group Proto Input Output TTL Uptime<br/>
<br/>
>I personally am a bit interested in the rpf for 172.24.37.3 `show ip rpf 172.24.37.3`.<br/>
<br/>
For a better debuging I changed the sender 172.24.37.3 to another host. This was on the FRR Host before. The new IP is 10.55.0.33.<br/>
I did this command on the host in Colo2 (closer to the sender).<br/>
<br/>
# sh ip rpf 10.55.0.33<br/>
Routing entry for 10.55.0.0/24 using Unicast RIB<br/>
Known via "bgp", distance 200, metric 0, best<br/>
Last update 1d22h03m ago<br/>
* 172.24.37.102, via eth0<br/>
<br/>
If you need any further debug output feel free to ask. Thank you very much for helping on this issue.<br/>
<br/>
greetings,<br/>
Jonas<br/>
</div></div></body></html>