3Com 7700 Configuration Manual page 39

Setting the Maximum MAC Addresses an Ethernet Port can Learn
Use the following command to set an amount limit on MAC addresses learned by
the Ethernet port. If the number of MAC address learned by this port exceeds the
value set by the user, this port will not learn MAC address.
Perform the following configuration in Ethernet port view.
Table 9 Set an Amount Limit to the MAC Addresses Learned by the Ethernet Port
Operation
Set an amount limit to the
MAC addresses learned by the
Ethernet port
Restore the default limit to the
MAC addresses learned by the
Ethernet port
Note: If the count parameter takes 0, the port is no permitted to learn MAC
address. There is no limit to the amount of the MAC addresses that an Ethernet
port can learn by default. However how many MAC addresses a port can learn is
still restricted by MAC address table.
Setting Link Type for Ethernet Port
Ethernet port can operate in three different link types; access, hybrid, and trunk
types. The access port carries one VLAN only, used for connecting to the user's
computer. The trunk port can belong to more than one VLAN and receive/send the
packets on multiple VLANs. The hybrid port can also carry more than one VLAN
and receive/send the packets on multiple VLANs. The difference between the
hybrid port and the trunk port is that the hybrid port allows the packets from
multiple VLANs to be sent without tags. However, the trunk port only allows the
packets from the default VLAN to be sent without tags.
Perform the following configuration in Ethernet port view.
Table 10 Set Link Type for Ethernet Port
Operation
Set the port to access port
Set the port to hybrid port
Set the port to trunk port
Restore the default link type,
that is, the access port.
Note:
Trunk port and Hybrid port cannot be configured in one Ethernet Switch
■
together.
If a port is specified as a mirror port, it cannot be set to a Trunk port again.
■
The port is access port by default.
Command
mac-address max-mac-count count
undo mac-address max-mac-count
Command
port link-type access
port link-type hybrid
port link-type trunk
undo port link-type
Ethernet Port Overview 31