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Multicasting

Crazy_Diamond
Occasional Advisor

Multicasting

Hey guys,

So I have a requirement to enable IGMP for video devices sitting in two different VLANs, let's say I have multimedia devices on Vlan 10 and the server on Vlan 20

Vlan 10 is on switch A and Vlan 20 on Switch B, Switch A and B are connected to a layer 3 switch that does internal routing

As far as I understand, ip igmp has to be enabled on both Vlan 10 and 20 on all the switches (A,B and L3), then multicast routing needs to be enabled on the L3 switch (ip multicast-routing)

So is this basic config going to work or do I need to have PIM configured as well ?

Thanks

4 REPLIES
cenk sasmaztin
Honored Contributor

Re: Multicasting

all L2 multicast configuration complated...

after

 

ip routing 
 
ip multicast-routing 
 
exit 
 
router pim 
 
exit 
 
vlan 13 
 
ip pim-dense 
 
ip-addr 10.10.13.254 
 
exit 
 
exit 
 
vlan 14 
 
ip pim-dense 
 
ip-addr 10.10.14.254 
 
exit 
 
exit 
 
vlan 15 
 
ip pim-dense 
 
ip-addr 10.10.15.254 
 
exit 
cenk

Masa2
Occasional Visitor

Re: Multicasting

We have a similar problem in our network. Multicast in one VLAN is working fine, multicast routing doesn’t.

We have two 5406zl as core routers with vrrp enabled and about 150 2500 Series Switches all over the building. Routes are static or direct attached, no RIP or OSPF is used.

One VLAN contains a TV-Server which uses Multicast to send video so several streaming clients in our network in the same VLAN.

I enabled multicast routing on both cores und enabled PIM on all vlans that need to receive the multicast stream.

 

ip multicast-routing

router pim

exit

vlan 14

ip pim-dense

exit

vlan 15

ip pim-dense

exit

 

On all 2500 Switches I enabled igmp in these the VLANs:

vlan 14 ip igmp

vlan 15 ip igmp

 

The mediaserver is in VLAN 14, my testclient is in VLAN 15 and can not receive the multicast stream.

Did I miss anything?

Linkk
Frequent Advisor

Re: Multicasting

Hi,

you need to tell your router the pim ip addresse in the "ip pim-dense" context.

I believe you could do something like this, to let the router decide the correct IP:

vlan 111
  ip addr 10.0.0.1 255.255.255.0
  ip pim-dense
    ip addresse any
    exit
  exit

Though I'm not sure how "any" works together with VRRP.

Masa2
Occasional Visitor

Re: Multicasting

The "ip address any" configuration is the default so the switch did it by itself. Current vlan configuration is:

vlan 14
tagged A1-A24,B1-B8,C1-C15,C17-C20,C22,D1-D24,F12,F17,F19,Trk1,Trk3
ip address 10.105.13.251 255.255.255.0
ip helper-address 10.105.3.113
ip helper-address 10.105.3.114
ip igmp
ip pim-dense
    ip-addr any
exit
qos priority 2
vrrp vrid 14
    virtual-ip-address 10.105.13.254
    enable
exit
exit

The vrrp configuration could be a problem. I will test the physical and the virtual address as pim-dense ip.

Edit: configuring a vrrp virtual-ip-address in pim-dense does not work so using the physikal address should be fine.

But it's still not working.