AirLive POE-FSH808AT - Manual (Page 54)

4. Web Management
AirLive POE-FSH808AT User’s Manual 49
 Output Queue Aging Time:
 Purpose: This function is used to avoid the traffic jam on one port will not cause the
congestion of other ports. In some application, for example the IPTV Multicast
communication, the multicast stream is continuously generating from the source port,
the client port may be congested because of the limited bandwidth or slow network
processing ability. Then, the Pause frame of Flow Control will be generated once the
packet buffer is full. With the Output Queue Aging Time feature, when a packet is
stored at output queue in a switch for a long time will be aged out and become a
useless packet.
 Aging Time: This command allows user to disable the feature or configure the aging
timeout time to 200ms, 400ms, 600ms or 800ms.
 VLAN Striding:
 Purpose: For some network environment, the network administrator probably want 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 uni-cast packets to
the destination port, no matter whether destination port is in the same VLAN.
 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.