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transmitted on the port. The error frames are not counted in.
Mult
icast: Displays the number of good multicast packets received or
transmitted on the port. The error frames are not counted in.
Unicast
: Displays the number of good unicast packets received or
transmitted on the port. The error frames are not counted in.
Alignment Errors
: Displays the number of the received packets that have a bad
Frame Check Sequence (FCS) with a non-integral octet
(Alignment Error). The length of the packet is between 64 bytes
and 1518 bytes.
UndersizePkts
: Displays the number of the received packets (excluding error
packets) that are less than 64 bytes long.
Pkts64Octets
: Displays the number of the received packets (including error
packets) that are 64 bytes long.
Pkts65to127Octets
: Displays the number of the received packets (including error
packets) that are between 65 and 127 bytes long.
Pkts128to255Octets
: Displays the number of the received packets (including error
packets) that are between 128 and 255 bytes long.
Pkts256to511Octets
: Displays the number of the received packets (including error
packets) that are between 256 and 511 bytes long.
Pkts512to1023Octets
: Displays the number of the received packets (including error
packets) that are between 512 and 1023 bytes long.
Pkts
Over1023Octets: Displays the number of the received packets (including error
packets) that are over 1023 bytes.
Collisions
: Displays the number of collisions experienced by a port during
packet transmissions.
5.4 MAC Address
The main function of the switch is forwarding the packets to the correct ports based on the
destination MAC address of the packets. Address Table contains the port-based MAC address
information, which is the base for the switch to forward packets quickly. The entries in the Address
Table can be updated by auto-learning or configured manually. Most entries are generated and
updated by auto-learning. In the stable networks, the static MAC address entries can enhance the
efficiency of packets forwarding remarkably, and the address filtering feature allows the switch to
filter the undesired packets and forbid its forwarding so as to improve the network security.
The types and the features of the MAC Address Table are listed as the following:
Type Configuration Way
Aging out
after
reboot
Relationship between the address
and the port
Static Manually binding No Being kept The MAC address cannot be learned
by the other ports in the same VLAN.
Dynamic Auto-learning Yes Clear The MAC address can be learned by
the other ports in the same VLAN.
Filtering Manually binding No Being kept -
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