Multicast Configuration

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Jarrueb
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Posts: 2
Joined: 18 Aug 2017 06:30

Multicast Configuration

Post by Jarrueb » 18 Aug 2017 07:01

Hi,

I need to create a multicast network. I have 6450,6350,6850.
This is my network :

Stream Server ----> 6450 <---------> 6350 <---------->6850<-------->6450<--------Users

I have an IP address on VLAN 10 on all switchs for Mangement.
I used VLAN 70 between Stream server and Users. Stream server send to ip : 225.0.0.1 to 225.0.0.8

Which is the best configuration on my switchs? IP address for all swichs on Vlan70 ?
Which is "querier-forwarding","querying" ? I need to use "Proxying", "Spoofing", "Zapping"?

I'm lost .... :?

Thank you for your help

silvio
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Re: Multicast Configuration

Post by silvio » 23 Aug 2017 16:27

If MC streamer and clients in same vlan, than you don't need MC routing (PIM, DVMRP) - you only need MC-switching.
At all your switches you have to enable MC:
ip multicast status enable

for MC you need at least an one switch an ip interface in this vlan (mostly your core, 6850???). This device is the querier - so this command is necessary there:
ip multicast querying enable

And if the streamer is not attached to the querier you need at this switch and all switches to the querier (6350/6450) the querier forwarder:
ip multicast querier-forwarding enable

But you can also activate all the three command at all your switches. There will be no problem with this.
regards
Silvio

Jarrueb
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Posts: 2
Joined: 18 Aug 2017 06:30

Re: Multicast Configuration

Post by Jarrueb » 28 Aug 2017 11:03

Thanks you Silvio,

It's working !!! :)
We can see MC with commands :

show multicast group
show multicast forward

Regards

skigno
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Posts: 1
Joined: 08 Jan 2019 08:10

Re: Multicast Configuration

Post by skigno » 09 Jan 2019 05:40

Hi all,

i want to understand better this post.

On the same switch if i have the MC Stream on VLAN 10 and users on VLAN 20, i must enter some commands for enable MC between vlans like:

ip multicast vlan 10 status enable
ip multicast vlan 20 status enable

Then if i have a situation like this:

Stream Server <---------> 6450 <---------> CORE <----------OSPF--------> CORE <---------> 6450 <--------->Users

what is the correct configuration considering the vlans are different between sites.

Thanks.

silvio
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Re: Multicast Configuration

Post by silvio » 09 Jan 2019 15:31

Multicast switching (IPMS) is L2 (within same vlan), Multicast Routing (IPMR) is L3 (between different vlan).
6450 does only support IPMS, but all the R7/R8-Switches with the advanced licens support also IPMR.
There are different IPMR-protocolls: DVMRP, PIM-SM, PIM-DM
Together with OSPF you can use PIM. In your case I would suggest PIM-DM (dense mode) - at your cores at all IP-Interfaces with MC-Traffic.
regards
Silvio

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