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ES4710BD 10 Slots L2/L3/L4 Chassis Switch
Note:
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Combo port is a conception involving the physical layer and the LLC sublayer of the datalink
layer. The status of a combo port will not affect any operation in the MAC sublayer of the
datalink layer and upper layers. If the bandwidth limit for a combo port is 1Mbps, then this
1Mbps applies to the active port of this combo port, regardless of the port type being copper or
fiber.
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If a combo port connects to another combo port, it is recommended for both parties to use
copper-forced or fiber-forced mode.
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Run “show interface” under Admin Mode to check for the active port of a combo port The
following result indicates if the active port for a combo port is the fiber cable port or copper
cable port: Hardware is Gigabit-combo, active is fiber (copper).
Example:
setting ports 1/25 -28 to fiber-forced
Switch(Config)#interface ethernet 1/25-28
Switch(Config-Port-Range)#combo-forced-mode sfp-forced
7.2.1.2.3 flow control
Command: flow control
no flow control
Function:
Enables the flow control function for the port: the “
no flow control”
command disables
the flow control function for the port
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Command mode:
Interface Mode
Default:
Port flow control is disabled by default.
Usage Guide:
After the flow control function is enabled, the port will notify the sending device to
slow down the sending speed to prevent packet loss when traffic received exceeds the capacity of
port cache. ES4710BD’s ports support IEEE802.3X flow control; the ports work in half-duplex
mode, supporting back-pressure flow control. If flow control results in serious HOL, the switch will
automatically start HOL control (discarding some packets in the COS queue that may result in HOL)
to prevent drastic degradation of network performance.
Note:
Port flow control function is NOT recommended unless the users need a slow speed, low
performance network with low packet loss.
Flow control will not work between different cards in
the switch. When enable the port flow control function, speed and duplex mode of both ends should
be the same.
Example:
Enabling the flow control function in ports 1/1-8.
Switch(Config)#interface ethernet 1/1-8
Switch(Config-Port-Range)#flow control
