Asante Technologies 35160 - Manual (Page 50)

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IntraCore 35160-T Port VLAN Info
======|======|===================|=============|=================|============|
Port | PVID | Vlan Membership |Accept Frames|Ingress 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 | All Frames | Disabled | Normal |
5 | 0001 | 0001u | All Frames | Disabled | Normal |
6 | 0001 | 0001u | All Frames | Disabled | Normal |
7 | 0001 | 0001u | All Frames | Disabled | Normal |
8 | 0001 | 0001u | All Frames | Disabled | Normal |
9 | 0001 | 0001u | All Frames | Disabled | Normal |
10 | 0001 | 0001u | All Frames | Disabled | Normal |
11 | 0001 | 0001u | All Frames | Disabled | Normal |
12 | 0001 | 0001u | All Frames | Disabled | Normal |
13 | 0001 | 0001u | All Frames | Disabled | Normal |
14 | 0001 | 0001u | All Frames | Disabled | Normal |
15 | 0001 | 0001u | All Frames | Disabled | Normal |
16 | 0001 | 0001u | All Frames | Disabled | Normal |
Q)uit N)ext Page Vlan G)rp Summ Vlan Port M)enu H)elp
4.4.7 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 have been
changed back to the factory-set defaults.
4.5 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. There is not a 1-to-1 mapping of IP multicast addresses to Ethernet multicast addresses.
When configuring a VLAN for multicast traffic, you specify the Ethernet address for the multicast group (see
“Multicast Forwarding Database Configuration” ).
IGMP
Communication on a LAN between end stations and routers is managed by the Internet Group Management
Protocol (IGMP). For complete information about IGMP, see RFC 1112, “Host Extensions...” and RFC 2236,
“Internet Group Management Protocol, Version 2” .
A router that supports multicast and IGMP sends periodic messages called “queries” on its LAN interfaces.
These queries inquire if any end stations want to join a multicast group. End stations signal their desire to
join the multicast group by responding with an IGMP “report.” By using a multicast routing protocol, such as
Protocol-Independent Multicast (PIM), routers maintain forwarding tables that they use to forward multicast
datagrams.