Does multicast work across VLANs?

Simply enabling the Multicast protocol on one VLAN will work if Airtames and PCs are on the same VLAN but in the case that Airtames and PCs are on different VLANs, the multicast traffic will need to cross VLANs.

What is multicast VLAN feature?

Multicast VLAN. To suppress the duplication of a multicast stream on the wireless medium and between the controller and access points, you can use the multicast VLAN feature. Multicast optimization enables you to create a multicast VLAN which you can use for multicast traffic.

What is multicast VLAN registration?

Multicast VLAN registration (MVR) enables more efficient distribution of IPTV multicast streams across an Ethernet ring-based Layer 2 network. In a standard Layer 2 network, a multicast stream received on one VLAN is never distributed to interfaces outside that VLAN.

Can switches multicast?

The mechanism adds efficiency because it enables a Layer 2 switch to selectively send out multicast packets on only the ports that need them. Without IGMP snooping, the switch floods the packets on every port. The switch “listens” for the exchange of IGMP messages by the router and the end hosts.

Can you multicast across subnets?

The router that is routing traffic between the subnets need to support multicast forwarding. IGMP is one such protocol that will allow multicast traffic to be routed between different IP Subnets, and is supported by Linux and most Cisco routers.

What is multicast router port?

A Multicast router (Mrouter) port is a port that connects to a Multicast router. The device includes the Multicast router port(s) numbers when it forwards the Multicast streams and IGMP/MLD registration messages.

How do I enable multicast?

To enable multicast routing, from Policy Manager:

1. Select Network > Multicast. The Multicast Setup dialog box appears.
2. Select the Enable Multicast Routing check box. This enables the PIM-SM multicast routing protocol globally. You must continue to Step 3 and add multicast interfaces for multicast routing to work.

What is the multicast address range?

224.0.0.0 to 239.255.255.255
The IP address that defines a multicast group is a Class D address (224.0. 0.0 to 239.255. 255.255). Multicast addresses cannot be used as source addresses for any traffic.

How are multicast packets routed between VLANs?

There is no traffic between VLANs (layer-2), except through a router (layer-3). By default, routers do not route multicast packets. Multicast routing is very different than unicast routing, and it must be specifically configured on all the routers between networks in order for multicast packets to be routed between networks.

Why does multicast not leak from one VLAN to another?

Steve, the IGMP Snooping optimizes multicast delivery within a VLAN, not between VLANs. Regardless of IGMP Snooping being active or not, multicast will never leak from one VLAN to another.

How does multicast work on a Cisco switch?

The switch “snoops” the IGMP response and thus learns which switch ports have multicast receivers connected, and which multicast groups they wish to receive. If you have no PIM router configured then you will typically need to configure an “IGMP snooping querier” which takes care of periodically sending the IGMP Membership Query.

Is the 4507 VLAN compatible with multicast?

I have been tasked with setting up one of the VLANs to support multicast, so a bunch of video streams will be injected at the 4507, and will be delivered to client PCs connected to the 2960 switches. The 4507 is running with SVIs to some VLANs, but the VLAN that will have the Multicast on it is isolated, with no SVI.I could change this if required

Does Multicast work across VLANs?

Simply enabling the Multicast protocol on one VLAN will work if Airtames and PCs are on the same VLAN but in the case that Airtames and PCs are on different VLANs, the multicast traffic will need to cross VLANs.

What is multicast VLAN?

Multicast VLAN registration (MVR) enables more efficient distribution of IPTV multicast streams across an Ethernet ring-based Layer 2 network. In a standard Layer 2 network, a multicast stream received on one VLAN is never distributed to interfaces outside that VLAN.

Is it possible to have multiple isolated VLANs?

Overview. In addition, hosts associated with the same Isolated VLAN cannot reach each other. There can be multiple Isolated VLANs in one Private VLAN domain (which may be useful if the VLANs need to use distinct paths for security reasons); the ports remain isolated from each other within each VLAN.

Can a community VLAN communicate with a primary VLAN?

Community: Any switch ports associated with a common community VLAN can communicate with each other and with the primary VLAN but not with any other secondary VLAN. There can be multiple distinct community VLANs within one Private VLAN domain. There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port.

How are broadcasts forwarded in a private VLAN?

In a regular VLAN, broadcasts are forwarded to all ports in that VLAN. Private VLAN broadcast forwarding depends on the port sending the broadcast: • An isolated port sends a broadcast only to the promiscuous ports or trunk ports. • A community port sends a broadcast to all promiscuous ports, trunk ports, and ports in the same community VLAN.

How are promiscuous ports connected in a private VLAN?

In private VLANs, the promiscuous ports are members of the primary VLAN, while the host ports belong to secondary VLANs. Because the secondary VLAN is associated to the primary VLAN, members of the these VLANs can communicate with each other at the Layer 2 level.

https://www.youtube.com/watch?v=Xie5w1g4w28