11-28-2022 05:23 PM
Hi there,
I need a little help here. I've been stuck while configuring Multicast Traffic for two VLANs 59 & 60. Actually, these VLANs belong to Security Systems, and they want to enable multicast traffic on the network devices (Switches (Layer 2 & 3) & Routers) so that security servers can communicate with each other. Moreover, they have also requested to disable IGMP Snooping.
I been looking for a solution but no luck so far. Is there anybody who can help.
Regards,
Ahmed
11-30-2022 05:39 AM
Hi
In short if there is only one router
multicast-routing
interface vl 59
ip pim sparse-dense mode
interface vl 60
ip pim sparse-dense mode
ip pim rp address <one valid address on the router, preferable a loopback>
Why they want to disable igmp snooping? I would not recomend it if it not clearly stated why.
/Mikael
12-01-2022 03:02 PM
Hi Mikael,
Thanks for that.
It's a big network and we have got multiple Routers at different sites. However, the SVI are created on the core Switches which are sitting behind the Router.
Just wondering to know, can we enable the below commands as you suggested on the core switches as well?
multicast-routing
interface vl 59
ip pim sparse-dense mode
interface vl 60
ip pim sparse-dense mode
ip pim rp address <one valid address on the router, preferable a loopback>
Thanks
Ahmed
12-01-2022 08:50 PM
Hi Mikael,
Could you please also elaborate on the below query.
In addition to my earlier question about Configuring Multicast Traffic, can we also enable Multicasting on Access Layer Switches (Layer 2)?
Regards,
Ahmed
12-06-2022 03:04 AM
If your goal is to just enable mcast between these 2 vlans, you should only configure this in the equipment that serves the vlan. If these 2 vlans is not configured on the same device, then you have to configure it on all intermediate routers as well
For L2, you don't have to do anything, mcast works by default. However, if you disable snooping, all mcast traffic will flood out on all ports in the vlan, even ports that do not have mcast listener. Therefor I recommend to use igmp snooping enabled (it is enabled by default)
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