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XG1200 User's Guide
Static unicast address
By registering a unicast MAC address to which a frame is forwarded with the MAC address table, you can forward a
specific unicast frame to a specified port. Static unicast addresses are not subject to MAC address removal controlled
by aging function.
To register, change or delete a static unicast address, carry out the following procedures in the administrator EXEC
mode.
xg# configure terminal
xg(config)# bridge mac-address-table
static MAC [vlan <1-4094>]
{[port <1-12>] | [agg-port <1-6>]}
xg(config)# no bridge mac-address-table
static MAC [vlan <1-4094>]
xg(config)# exit
Static multicast address
By registering a multicast MAC address to which a frame is forwarded with the MAC address table, you can forward a
specific multicast frame to a designated port.
To register, change or delete a multicast address, carry out the following procedures in the administrator EXEC mode.
xg# configure terminal
xg(config)# bridge mac-address-table
static MAC [vlan <1-4094>]
[port <1-12> [<1-12>
[agg-port <1-6> [<1-6>
xg(config)# no bridge mac-address-table
static MAC [vlan <1-4094>]
xg(config)# exit
4.1.3 Jumbo Frame Support
The XG1200 can transmit jumbo frames of up to 15KB (15360 bytes).
To configure jumbo frame support, carry out the following procedure in the administrator EXEC mode.
xg# configure terminal
xg(config)# bridge jumbo-frame
[{9216 | 12288 | 15360}]
xg(config)# no bridge jumbo-frame
xg(config)# exit
If the maximum jumbo frame size is set to 15360, flow control is set to "only-receive" and unable to be set to
"send-receive".
4.1.4 Flow Control
Flow control is a function to prevent frame loss when the receive buffer in the switch overflows due to temporary traffic overload
by using a PAUSE frame.
When XG1200 has received a PAUSE frame, it temporarily stops sending frames at the receive port. If space in the receive
buffer runs out, it is possible to restrict frame transmission from the connected device by sending a PAUSE frame.
For each port, it is possible to select whether or not to send a PAUSE frame. Select the mode depending on whether the
destination can control a PAUSE frame.
To change the flow control mode, carry out the following procedures in the administrator EXEC mode.
xg# configure terminal
xg(config)# interface port 1 2 3
xg(config)# interface port range 1 3
xg(config-if)# flowcontorol
{ only-receive | send-receive }
xg(config-if)# exit
xg# exit
If the maximum jumbo frame size is set to 15360, flow control is set to "only-receive" and unable to be set to
"send-receive".
Command
Command
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Command
Command
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Task
Switch to global configuration mode.
Register a static unicast address and destination port with the
MAC address table (or remove them from it).
Exit to administrator EXEC mode.
Task
Switch to global configuration mode.
Register (or remove) a static multicast address table and
destination port.
For a multicast MAC address, multiple ports can be specified.
Exit to administrator EXEC mode.
Task
Switch to global configuration mode.
Enable (or disable) jumbo frame support.
Exit to administrator EXEC mode.
Task
Switch to global configuration mode.
Switch to the interface edit mode for the port for which you
want to change the flow control mode.
In this example, the global interface configuration mode is
selected for ports 1 through 3.
Set the flow control mode.
Exit to global configuration mode.
Exit to administrator EXEC mode.
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