The switch maintains a cache of multicast routing entries used to calculate the delivery tree in multicast routing protocols. The Multicast Forwarding Cache includes the subnetwork that contains the multicast source and the nearest upstream neighbor for each known multicast group address.
Parameter | Description |
Group Address | An IP multicast group address with subscribers directly attached or downstream |
| from this switch. |
Source Address | The IP subnetwork at the root of the multicast delivery tree. This subnetwork |
| contains a known multicast source. |
Mask | Subnet mask that is used for the source address. This mask identifies the host |
| address bits used for routing to specific subnets. |
Upstream Neighbor | The IP address of the network device immediately upstream for this group. |
Protocol | The multicast routing protocol associated with this entry. |
Up Time | The time elapsed since this entry was created. |
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WGS3 Layer 3 Switch User’s Manual | - 219 - |