Mac Table - ZyXEL Communications MSC1024G Series User Manual

The following table describes the labels in this screen.
Table 176 DHCP Statistics
LABEL
Slot
Port
Load
Flush
Discover
Offer
Request
Ack
Overflow
Flush
Snooping
Table
Overflow
Index
IP
VID
MAC Address

14.4 MAC Table

The MAC table lists device MAC addresses that are dynamically learned by the system. The
table shows the following for each MAC address: the port upon which Ethernet frames were
received from the device, to which VLAN groups the device belongs (if any) and to which
channel it is connected (for devices connected to DSL ports).
The switch uses the MAC table to determine how to forward frames. See the following figure.
1 The switch examines a received frame and learns the port on which this source MAC
address came.
2 The switch checks to see if the frame's destination MAC address matches a source MAC
address already learned in the MAC table.
• If the switch has already learned the port for this MAC address, then it forwards the
frame to that port.
• If the switch has not already learned the port for this MAC address, then the frame is
flooded to all ports. Too much port flooding leads to network congestion.
• If the switch has already learned the port for this MAC address, but the destination
port is the same as the port it came in on, then it filters the frame.
MSC1000G/1024G/1224G Series User's Guide
DESCRIPTION
Select the number of a line card's slot.
Select the number of a DSL port on the line card.
Click Load to retrieve the port's IGMP filter profile setting and display it in the Profile
drop-down list box.
Click Flush to remove all of the entries from the table below.
This field displays the number of DHCP Discover packets on this port.
This field displays the number of DHCP Offer packets on this port.
This field displays the number of DHCP Request packets on this port.
This field displays the number of DHCP Acknowledge packets on this port.
This field displays the number of IP addressees not added to the DHCP snooping
table when it is full.
Click Flush to remove all of the entries from the table below.
This field displays whether the DHCP snooping table is full or not.
This field displays the index number.
This field displays the IP address assigned to a client n this port.
This field displays the VLAN ID of the VLAN to which the client computer belongs.
This field displays the MAC address of the client computer.
Chapter 14 Statistics Screens
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