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VLAN Striding:
Purpose:
For some network environment, the network administrator probably
wanst to filter undesired broadcast or multicast packet to enhance the network
bandwidth utilization and forward meaningful unicast to a specific destination. VLAN
is a good mechanism to block broadcast packet, but it can also block the unicast
packet communication between VLANs. To solve this issue, a special function
called “VLAN striding” is designed to achieve this purpose. If VLAN striding is
enabled, the packet will be forwarded to the destination port directly. The unicast
packet can stride across VLAN.
VLAN Striding:
By selecting this function, the switch will forward unicast packets to
the destination port, no matter whether destination port is in the same VLAN.
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IGMP Snooping V1 & V2:
Purpose:
A switch will, by default, flood multicast traffic to all ports in a broadcast
domain. Multicast can cause unnecessary load on host devices by requiring them to
process packets they have not solicited. The IGMP snooping is a feature that allows
the switch to listen in on the IGMP conversation between hosts and routers. By
listening (also known as snooping) to these conversations, the switch maintains a
map of which ports (clients) need which multicast stream (source). Multicast may be
filtered which do not need them, Multicast may be forwarded only to the IGMP group
it joined.
IGMP Snooping:
When this function is enabled, the switch will execute IGMP
snooping version 1 and version 2 without the intervention of CPU. The IGMP report
and leave packets are automatically handled by the switch. The next setting, IGMP
Leave Packet can be enabled or disabled. After enabled, the Leave packet will be
forwarded to IGMP router ports.
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VLAN Uplink:
Purpose:
This switch does not implement Independent VLAN (IVL) MAC address
table. It utilizes VLAN uplink to emulate the function of IVL. An independent VLAN
MAC address table is based on both the source MAC address and the VLAN. In
some application, if the Ethernet switch cannot build the separate MAC address table
for different VLANs, there will be a conflict of MAC address table. To solve this
problem, the switch controller utilizes the VLAN Uplink port to emulate the usage of
Independent VLAN MAC Address Table.
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