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New Member

Multicast on 4500 Core Switch and 3750x IDF switches

At our site we have a 4510 core switch and 3750x switches in our IDFs. The 3750 switches are connected to the core via DOT1Q trunks in a server client setup. We are putting in an Informacast/Berbee server witch will send pages and text to the cisco phones. We also have 1 3750 switch connecting to the core via a layer 3 port channel. If we put the Informacast server on the phones vlan would I just need to enable ip pim sparse-dense mode on that vlan only and enable multicast routing, ip multicast routing? Would I also need ip pim send-rp-announce command also?

Any help would be greatly appreciated,

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Hall of Fame Super Bronze

Multicast on 4500 Core Switch and 3750x IDF switches

Please rate helpful posts and good luck on your deployment!

6 REPLIES
Hall of Fame Super Bronze

Re: Multicast on 4500 Core Switch and 3750x IDF switches

On such a small setup, I recommend going with Static RP (ip pim rp-address x.x.x.x) instead of Auto-RP (ip pim send-rp-announce).

If all your Multicast sources are originating from the same segment, we suggest assigning the closest L3 device to that segment as the RP.

Regards,

Edison

New Member

Multicast on 4500 Core Switch and 3750x IDF switches

On the 4510 switch we have our voice vlan (232)10.X.X.1 /24. We are putting the informact server on that vlan. Then we have 9 IDF 3750 switches connecting to the 4510 via dot1q trunks (server, client). We have two swtches stacked that have a layer 3 port channel to the 4510. The IP on the port channel on the 4510 is 10.60.X.1 /30. On the 3750 is the .2. So what I understand is I don't have to enable multicast on the 3750 switches that are connecting via a dot1q trunk? But would need to enable multicast routing on the 4510 and the 3750 switch that has the layer 3 port channel. Would the below config work?

4510-

ip multicast-routing

!

interface vlan 232

description voice vlan

10.X.X.1 255.255.255.0

ip pim sparse-dense-mode

!

interface PO1

ip address 10.60.X.1 255.255.255.252

ip pim sparse-dense mode

!

ip pim rp-address 10.X.X.1 (VOICE VLAN)

____________________________________________

3750 with port channel

ip mutlicast routing

!

interface po1

desc connects to 4510

ip address 10.60.X.2 255.255.255.252

ip pim sparse-dense mode

!

interface vlan 50

description voice vlan

ip address 10.X.232.1 255.255.255.0

ip pim sparse-dense mode

Thanks againg for your help

Hall of Fame Super Bronze

Multicast on 4500 Core Switch and 3750x IDF switches

I suggest going with 'pim sparse mode' rather than 'pim sparse-dense mode'

You need to configure the ip pim rp-address on the 3750 as well - same command as 4500 (ip pim rp-address 10.x.x.1)

Last but not least, 3750 will use distributed multicast so the command is ip multicast-routing distributed.

New Member

Multicast on 4500 Core Switch and 3750x IDF switches

Thank you for your help, I really appreciate it. I will give this a shot!

Hall of Fame Super Bronze

Multicast on 4500 Core Switch and 3750x IDF switches

Please rate helpful posts and good luck on your deployment!

New Member

Hi Edison Ortiz    

Hi Edison Ortiz    

Can you please give me sample commands for my scenario :-

1. I have Call Manager server and Informacast Paging server connected to core switch (6509) on VLAN 10.

2. My IP Phones are connected to 3750X Access Switches uplinked ( by Trunk )to Core Switch(6509) on VLAN 20.

3. SVI of VLAN 10 on Core Switch is 10.10.10.1 and SVI of VLAN 20 on Core Switch is 10.10.20.1 . 

What are the commands to be added on Core Switch and Access Switches and on which all SVI's or interfaces ?

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