Multicast Issues - Works in the RP but not in the rest of the network

[simoesmarco8626982]

Hi all,

hope you can help me.

I have system running where I want to use multicast. The system is a CCTV system and the network is as per below:

Basically it's a ring running OSPF between Catalyst 9300 and the two catalyst 9300 to the right have Access switches connected to it. The networks of the cores are 10.1.0.0, 10.2.0.0, 10.3.0.0, 10.4.0.0, 10.5.0.0, 10.6.0.0 10.7.0.0/24.

The first two networks are from the switches that have the access switches connected to it and the multicast config is as per below: 

ip multicast-routing

interface Loopback0
ip address 10.1.0.0
ip pim sparse-mode

interface Vlan30
ip address 10.1.30.0
ip pim sparse-mode
!
interface Vlan40
ip address 10.1.40.0 255.255.255.0
ip pim sparse-mode

Every switch has the vlans above with it's own networks and connecting the switches we have two more vlans to each side:

interface Vlan4010
ip address 10.2.254.0
ip pim sparse-mode
!
interface Vlan4011
ip address 10.1.254.0
ip pim sparse-mode

Then for the two switches that have the access switches connected and in two other switches of the ring we have the config below for the multicast:

ip pim autorp listener
ip pim send-rp-announce Loopback0 scope 30
ip pim send-rp-discovery Loopback0 scope 30

The system is running autoRP and in the remaining switches we have a similar config as the above, the only differene being that it only has the config below for the autoRP: 

ip pim autorp listener

Now I can see using the

show ip pim rp 

mapping the RP being elected correctly as per the Auto RP, and the RP is one of the switches that has the access switches connected to it. If I put a camera configured to use multicast in the network of the RP (10.1.0.0), the cameras works correctly and I can see in

show ip mroute 

the route for this camera and can see live video. Now if I configure another camera, a camera that is in one of the switches of the ring, for example the switch 10.2.0.0, the camera never joins the group and by doing the

show mroute

in that switch, I can't see anything in the routing table and I don't get any live video. Basically it always works on the 10.1.0.0 (the RP) but in all the others it doesn't work. The config for all the switches is similar. 

Please anyone has an idea of what can be the issue? 

Thank you

[simoesmarco8626982]

Hi,

was doing some tests and discovered that the receiver joins the group in question and I can see it in the mroute table, but the sender never joins the group no matter what.

Any ideas please?

Thank you

[simoesmarco8626982 · Accepted solution]

All sorted... the issue in the end was my ACL filtering all the multicast traffic. Created an exception for this traffic and everything is now working