Cisco Sg3008 Manual

VLAN Management
VL ANs
196 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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VL AN Description
Each VLAN is configured with a unique VID (VLAN ID) with a value from 1 to 4094. 
A port on a device in a bridged network is a member of a VLAN if it can send data 
to and receive data from the VLAN. A port is an untagged member of a VLAN if all 
packets destined for that port into the VLAN have no VLAN tag. A port is a tagged 
member of a VLAN if all...

VLAN Management
VL ANs
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)  197
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VL AN Roles
VLANs function at Layer 2. All VLAN traffic (Unicast/Broadcast/Multicast) remains 
within its VLAN. Devices attached to different VLANs do not have direct 
connectivity to each other over the Ethernet MAC layer. Devices from different 
VLANs can communicate with each other only through Layer 3 routers. An IP 
router, for example, is required to route IP traffic...

VLAN Management
Configuring Default VL AN Settings
198 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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Customer traffic is encapsulated with an S-tag with TPID 0x8100, regardless of 
whether it was originally c-tagged or untagged. The S-tag allows this traffic to be 
treated as an aggregate within a provider bridge network, where the bridging is 
based on the S-tag VID (S-VID) only.
The S-Tag is preserved while traffic is forwarded through the...

VLAN Management
Configuring Default VL AN Settings
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)  199
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•It cannot be used for any special role, such as unauthenticated VLAN or 
Voice VLAN. This is only relevant for OUI-enabled voice VLAN.
•If a port is no longer a member of any VLAN, the device automatically 
configures the port as an untagged member of the default VLAN. A port is 
no longer a member of a VLAN if the VLAN is deleted or the port is...

VLAN Management
Creating VL ANs
200 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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Creating VLANs 
You can create a VLAN, but this has no effect until the VLAN is attached to at least 
one port, either manually or dynamically. Ports must always belong to one or more 
VLANs. 
The 300 Series device supports up to 4K VLANs, including the default VLAN.
Each VLAN must be configured with a unique VID (VLAN ID) with a value from 
1 to 4094. The device...

VLAN Management
Configuring VL AN Interface Settings
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)  201
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Configuring VLAN Interface Settings 
The Interface Settings page displays and enables configuration of VLAN-related 
parameters for all interfaces
To configure the VLAN settings:
STEP 1Click VLAN Management > Interface Settings.
STEP  2Select an interface type (Port or LAG), and click Go. Ports or LAGs and their VLAN 
parameters are displayed....

VLAN Management
Defining VLAN Membership
202 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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-Admit Tagged Only—The interface accepts only tagged frames.
-Admit Untagged Only—The interface accepts only untagged and 
priority frames. 
•Ingress Filtering—(Available only in General mode) Select to enable ingress 
filtering. When an interface is ingress filtering enabled, the interface discards 
all incoming frames that are classified as VLANs of which...

VLAN Management
Defining VLAN Membership
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Configuring Port to VLAN
Use the Port to VLAN page to display and configure the ports within a specific 
VLAN.
To map ports or LAGs to a VLAN:
STEP 1Click VLAN Management > Port to VLAN.
STEP  2Select a VLAN and the interface type (Port or LAG), and click Go to display or to 
change the port characteristic with respect to the VLAN. 
The port mode for each...

VLAN Management
Defining VLAN Membership
204 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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Configuring VLAN Membership
The Port VLAN Membership page displays all ports on the device along with a list 
of VLANs to which each port belongs.
If the port-based authentication method for an interface is 802.1x and the 
Administrative Port Control is Auto, then:
•Until the port is authenticated, it is excluded from all VLANs, except guest 
and...

VLAN Management
GVRP S et tings
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-Ta g g e d—Select whether the port is tagged. This is not relevant for 
Access ports.
-Untagged—Select whether port is untagged. This is not relevant for 
Access ports.
-PVID—Port PVID is set to this VLAN. If the interface is in access mode or 
trunk mode, the device automatically makes the interface an untagged 
member of the VLAN. If the interface is in general...