UNICOM Electric SmartGST-2402M - Manual (Page 54)

UNICOM SmartGST-2402M
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high-priority queue.
These options represent the number of high priority packets sent before one low priority
packet is sent. For example, 5 High: 2 Low means that the switch sends 5 high priority
packets before sending 2 low priority packets.
QoS Policy: High Priority Levels: 0~7 priority level can be assigned to the high or low
queues.
5-4-2-3 Miscellaneous Setting
Collisions Retry Forever:
Disable –in case of collisions in half duplex, switch will retry 48 times and then drop
frame.
Enable – in case of collisions in half duplex, switch will retry indefinitely.
802.1x Protocol: Enable or disable 802.1x protocol.
Hash Algorithm: CRC Hash or Direct Map for MAC address learning algorithm
IFG Compensation: Internal Packet Gap time compensation configuration: Enable or
Disable.
IGMP Query Mode: Recognizes different queries from clients or servers to decide
which Query will be the first priority. The modes are:
a. Auto Mode: Chooses the switch that has the smallest IP address to be set
for the IGMP Query mode.
b. Enable Mode: Enables the switch to be the IGMP Querier.
c. Disable Mode: Disables all other switches from being the IGMP Querier.
IGMP Theory of Operation
The following three topologies detail how IGMP Query works and can be configured
within a network:
Auto Mode should be enabled when the router’s IP address is smaller than other
switches in the subnet.