06-11-2023
11:13 AM
- last edited on
06-20-2023
05:31 AM
by
Translator
Hi All,
If I wanted to get my device (listener) to
igmp-join
a specific group say 224.2.2.2, will
auto-rp
automatically detect it ?
From what I understand
Auto-RP
sends info about its RPs on 224.0.0.39-40.
How do I actually get my video client to listen on a specific multicast address in an
auto-rp
config?
Do I still need to configure the
igmp join
request on the closest router to the device?
Solved! Go to Solution.
06-11-2023
01:39 PM
- last edited on
06-20-2023
05:34 AM
by
Translator
Hello @nwekechampion,
Auto-RP
uses specific multicast groups for RP mapping announcements and candidate RP advertisements. It does not directly handle
IGMP join
requests or control multicast group membership.
To get your video client to listen on a specific multicast address (such as 224.2.2.2) in an
Auto-RP
configuration, you still need to configure the
IGMP join
request on the closest router to the device.
06-11-2023
01:39 PM
- last edited on
06-20-2023
05:34 AM
by
Translator
Hello @nwekechampion,
Auto-RP
uses specific multicast groups for RP mapping announcements and candidate RP advertisements. It does not directly handle
IGMP join
requests or control multicast group membership.
To get your video client to listen on a specific multicast address (such as 224.2.2.2) in an
Auto-RP
configuration, you still need to configure the
IGMP join
request on the closest router to the device.
06-11-2023 10:43 PM
Thank you!!
Just labbed it and it worked!
HOwever, I have got a quick question.. Can I join different devices to different multicast groups on the same interface?
Thanks
06-11-2023
11:02 PM
- last edited on
06-20-2023
05:37 AM
by
Translator
Hello @nwekechampion,
Yes, it is possible for different devices to join different multicast groups on the same interface. Each device can independently join the multicast groups it is interested in, and the network will deliver the corresponding multicast traffic to the appropriate devices.
Each device would send
IGMP join
messages specifying the multicast groups it wants to join. The network infrastructure, such as routers and switches, will use
IGMP
snooping to keep track of the multicast group memberships for each interface. When multicast traffic is sent to a specific group, the network will forward the traffic only to the interfaces where devices have joined that particular group.
So, if you have multiple devices connected to the same interface and each device wants to receive multicast traffic for different multicast groups, you can configure each device to join its desired multicast groups using
IGMP
06-12-2023 11:08 PM
Thanks!!
06-12-2023 12:28 AM
I will try lab this case tonight with details
MHM
06-12-2023 11:09 PM
How did you go with the labs?
06-20-2023 11:13 AM - edited 07-10-2023 04:52 AM
My todo list is full,
this lab I config LO 3.3.3.3 and it can server both multicast 229.5.5.1 229.6.6.1 in same time
the LAB is using OSPF to connect all three routers in middle
07-10-2023 04:54 AM
Many thanks @MHM Cisco World ..
I eventually figured this out whilst labbing it as well.
Apologies for my lare reply.. just have multiple projects coming out through my ears..
Appreciate the effort and the assistance.
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