Cisco Sg2008 Manual

Spanning Tree
Configuring STP Interface Settings
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The following information appears in the Designated Root section of the page:
•Bridge ID—The bridge identifier, which is a concatenation of the bridge 
priority and the base MAC address of the bridge.
•Root Bridge ID—The Bridge ID of the root bridge. The bridge with the lowest 
Bridge ID among all the bridges become the root bridge.
•Root Port—The port number that offers the lowest-cost path...

Spanning Tree
Configuring STP Interface Settings
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•STP—Select to enable STP operation on the port/LAG.
•Auto Edge—Select Enable to allow the switch to automatically determine if 
the port is an edge port or PortFast. A port is an edge port if it is not 
connected to a bridge. Auto-detection speeds up the transition of the port to 
forwarding state. A port can forward traffic and learn MAC addresses when 
it is in forwarding state.
•Edge...

Spanning Tree
RSTP Interface Settings
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•Port State—Current STP state of a port. If enabled, the port state 
determines the forwarding action that is taken on traffic. Possible port states 
are: 
-Disabled—STP is currently disabled on the port. The port does not 
participate in the spanning tree, but is in an operational state to learn 
MAC addresses and forward traffic.
-Discarding—Port is currently blocked and cannot be used to forward...

Spanning Tree
RSTP Interface Settings
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By default, the RSTP Interface Settings Table displays information for each port. 
Use the Interface Type list to display ports or LAGs in the table. The RSTP 
Interface Table displays the following information for each port:
•Point to Point Operational Status—A physical port has a point-to-point 
connection to a LAN if it operates in full duplex. 
•Port Role—Port role assigned by the STP algorithm to...

Spanning Tree
RSTP Interface Settings
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MSTP Instance Settings
MSTP Interface Settings 

Spanning Tree
RSTP Interface Settings
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MAC Address Tables
This chapter describes the static configuration and dynamic learning of Media 
Access Control (MAC) addresses into the filtering database of the switch. The 
switch searches its filtering database to determine which port a packet is to be 
forwarded to. The filtering database is also referred as the bridging table in this 
document. The search is based on the VLAN and destination MAC address of the 
packet. If search does...

MAC Address Tables
Configuring Static MAC Addresses
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•MAC Address— Enter the static MAC address.
•Status—Select a status for this static MAC address:
-Permanent—When this status is selected, the static MAC address does 
not expire. Note, however, that if the switch is rebooted, the entry is not 
restored unless the Running Configuration file type was copied to the 
Startup Configuration file type. See Copying and Saving Configuration 
Files....

MAC Address Tables
Configuring the Aging Time for Dynamic Addresses
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Configuring the Aging Time for Dynamic Addresses
The Dynamic Address Settings page enables you to set an aging time, after 
which the system removes addresses in the dynamic MAC address table that 
have not been refreshed. The aging period applies to dynamically learned 
addresses and to static addresses that are configured to Delete on Timeout. The 
default aging time is 300...

MAC Address Tables
Dynamic MAC Addresses
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The Dynamic Address Table displays the following fields for each entry it learns:
•VLAN ID—VLAN on which the MAC address was learned. Frames are 
forwarded to the interface only if they are associated with this VLAN.
•MAC Address—The dynamically learned MAC address.
•Interface—The port on which the MAC address was dynamically learned. 
Frames specifying this MAC address and VLAN as the destination are...