Asante Technologies 35160 IP Multicast Traffic Management, Displaying a Vlan Port Summary

4.3.6 Displaying a VLAN Port Summary

To view a unit port VLAN summary, type v in the Configuration Menu to access the VLAN Management Menu, then type a to access the Port VLAN Attribute Summary. A screen similar to the one following will appear. To view the summary for other units, type a command as shown at the bottom of the screen.

IntraCore 35160-T Port VLAN Info

=========================================================================

Port PVID Vlan Membership Accept FramesIngress Filtering Port Type

=========================================================================

1	0001	0001u	All Frames	Disabled	Normal
2	0001	0001u	All Frames	Disabled	Normal
3	0001	0001u	All Frames	Disabled	Normal
4	0001	0001u 0002u 0003u All Frames		Disabled	Normal
		0004u 0005u 0006u
		0007u 0008u 0009u
		0010u 0011u 0012u
		0013u 0014u 0015u
		0016u 0017u 0018u
		0019u 0020u 0021u
		0022u 0023u 0024u
		0025u 0026u 0027u
		0028u 0029u 0030u
		0031u 0032u 0033u
		0034u 0035u 0036u
		0037u 0038u 0039u
Q)uit	N)ext	Page Vlan G)rp Summ	Vlan Port M)enu	H)elp

4.3.7 Resetting VLAN Configuration to Defaults

To reset the security measures on the switch to the factory defaults, access the VLAN Management Menu by typing v in the Configuration Menu. Then type r to reset all of the VLAN configurations that were changed back to the factory-set defaults.

4.4 IP Multicast Traffic Management

Multicast traffic is a means to transmit a multimedia stream from the Internet (a video conference, for example) without requiring a TCP connection from every remote host that wants to receive the stream. The stream is sent to the multicast address, and from there it’s propagated to all interested parties on the Internet.

Traditional IP communication allows a host to send packets to a single host (unicast transmission) or to all hosts (broadcast transmission). IP multicast provides a third scheme, allowing a host to send packets to a subset of all hosts (group transmission).

Multicast Addresses

Multicasts are sent to special IP addresses in the range from 224.0.0.0 through 239.0.0.0. These are also called “Class D” addresses. The IP multicast address always begins with the four bits 1110 (which identifies the address as a multicast). The remaining 28 bits of the multicast address specify the individual multicast group.

When an end station wants to join in an IP multicast group, it binds the multicast address of that group to its network interface. When a node is using an IP multicast address, it also uses an Ethernet multicast address. Ethernet IP multicast addresses begin 01:00:5e. The remaining 24 bits are the lowest 24 bits of the IP multicast address. A 1-to-1 mapping of IP multicast addresses to Ethernet multicast addresses does not exist. When configuring a VLAN for multicast traffic, specify the Ethernet address for the multicast group (see “Multicast Forwarding Database Configuration” in this chapter).

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