Cisco Sg2008 Manual

							Port Management
Green Ethernet
Cisco Small Business SG200 Series 8-port Smart Switch 101
4
 
To configure global Green Ethernet properties:
STEP 1Click Port Management > Green Ethernet > Properties in the navigation window.
By default, Energy Detect mode is enabled globally and on all ports.
STEP  2If not already enabled, select Energy Detect Mode to enable this feature on the 
switch. The switch automatically enters the low-power mode when energy on the 
line is lost, and it resumes normal operation when energy is detected. 
STEP  3Click Apply. Your changes are saved to the Running Configuration.
Configuring Green Ethernet Port Settings
Use the Green Ethernet Por t Settings page to view and configure Energy Detect 
settings on individual ports. 
NOTEEnergy Detect port settings are overridden if the global settings are subsequently 
changed (see Configuring Green Ethernet Properties).
To configure Green Ethernet port settings:
STEP 1Click Port Management > Green Ethernet > Port Settings in the navigation 
window.
The Settings page displays the following Energy Detect fields for each port:
•Admin—Indicates whether Energy Detect is enabled on the port.
•Operational—Indicates whether Energy Detect mode is currently 
operational (“Enabled”) on the port. 
•Reason—Indicates why the operational status is enabled or disabled.
The following reason may display when the Energy Detect operational status 
is Enabled.
-No Energy Detected—No energy is detected on the link.
The following reasons might display when the Energy Detect operational 
status is Disabled.
-Fiber—The administrative status might be active but the port is 
functioning in fiber mode. (Green Ethernet functionality applies only to 
copper ports.) 
						

							Port Management
Green Ethernet
Cisco Small Business SG200 Series 8-port Smart Switch 102
4
 
-Link up—There is activity on the link.
-Admin Down—Energy detect mode is administratively disabled.
STEP  2Select the port to configure and click Edit.
STEP  3Select Energy Detect to administratively enable Energy Detect on the port.
STEP  4Click Apply to save any changes to the Running Configuration. 
						

							5
Cisco Small Business SG200 Series 8-port Smart Switch 103
 
VLAN Management
This chapter describes how to configure virtual LANs.
It includes the following topics:
•Creating VLANs
•Configuring VLAN Interface Settings
•Configuring VLAN Membership
•Configuring Port VLAN Membership
•Setting the Default VLAN
•Voice and Media
Virtual LAN (VLAN) on a Layer 2 switch offers some of the benefits of both 
bridging and routing. Like a bridge, a VLAN switch forwards traffic based on the 
Layer 2 header, which is fast. Like a router, it partitions the network into logical 
segments, providing better administration, security, and management of multicast 
traffic.
A VLAN is a set of end stations and the switch ports that connect them. You might 
have many reasons for the logical division, such as department or project 
membership. The only requirement is that the end station and the port to which it 
is connected both belong to the same VLAN(s).
Each VLAN in a network has an associated VLAN ID, which appears in the IEEE 
802.1Q tag, also known as VLAN tag, in the Layer 2 header of packets transmitted 
on a VLAN. If an end station omits the tag, or the VLAN portion of the tag, the first 
switch port to receive the packet either rejects it or inserts a tag matching its 
default VLAN ID. A port can handle traffic for more than one VLAN, but it can only 
support the Port VLAN ID (PVID).
The switch is pre-configured with VLAN ID 1 as the Default VLAN. All ports are 
members of this VLAN, and use its VLAN ID (1) as their PVID.  
						

							VLAN Management
Creating VL ANs
Cisco Small Business SG200 Series 8-port Smart Switch 104
5
 
Creating VLANs
The Create VL AN page enables you to define and configure VLANs on the 
network. To display this page VLAN Management > Create VLAN in the 
navigation window.
The VLAN Table displays the VLAN ID, name, if one exists, and type for the pre-
configured VLAN (VLAN ID 1) and any VLANs that you add. One port must be 
configured as the Default VLAN. The type for all other VLANs is Static. The switch 
is pre-configured with VLAN ID 1 as the Default VLAN. All ports are members of 
this VLAN, and use its VLAN ID (1) as their PVID. 
If you create additional VLANs, you can configure one of them as the Default VLAN. 
(See Setting the Default VLAN.) The configured Default VLAN cannot be deleted. 
A Static VLAN can be deleted. However, VLAN ID 1 cannot be deleted, even if it is 
configured as a Static VLAN.
You can create up to  VLANs, and assign VLAN IDs up to 4094. To create a new 
VLAN or a range of VLANs:
STEP 1Click Add.
STEP  2Select VLAN and enter a VLAN ID.
Or, create a range of VLANs by selecting Range and specifying the beginning and 
ending VLAN IDs in the range.
STEP  3If you are creating a single VLAN, you can enter an optional VLAN name for easy 
reference.
STEP  4Click Apply and then click Close. Your changes are saved to the Running 
Configuration.
Configuring VLAN Interface Settings
You can use the Inter face Set tings page to view and configure port VLAN tagging 
capabilities. To display this page click VLAN Management > Interface Settings in 
the navigation window.
The Interface Setting Table shows the VLAN configuration for each port. To 
display the VLAN configuration on link aggregation groups, select LAG from the 
Interface Type list.  
						

							VLAN Management
Configuring VL AN Interface Settings
Cisco Small Business SG200 Series 8-port Smart Switch 105
5
 
To configure VLAN interface settings:
STEP 1Select the port or LAG to configure and click Edit.
STEP  2Configure the following settings for the selected port or LAG:
•Interface VLAN Mode—Select an option to configure the port type with 
respect to VLAN membership and tagging.
-General—The port can be a member of one or more tagged or untagged 
VLANs. This mode allows the full capabilities specified in the IEEE 802.1Q 
specification, “VLAN Tagging.”
-Access—The port can accept only untagged frames. An access port can 
be a member of only one VLAN and it uses the VLAN ID as its port VLAN 
ID (PVID). Access ports are typically used to connect hosts, which 
become members of the VLAN by virtue of being physically connected 
to the port .
-Trunk—The port can be assigned to only one untagged VLAN, the native 
VL AN, and can be assigned to any number of tagged VLANs (or none). 
Trunk ports carry traffic for multiple VLANs from the switch to other 
network devices, such as an upstream router or an edge switch.
•PVID—(General ports only) The port VLAN ID indicates the default VLAN 
that the interface is a member of. Set the PVID equal to a VLAN ID where the 
port is an untagged member. (For Access ports, the PVID is automatically set 
to the Access VLAN ID. For Trunk ports, the PVID is set to the configured 
Native VLAN ID or, if None is configured, to the default VLAN ID.)
•Native VLAN—(Trunk ports only) The native VLAN identifies the one 
untagged VLAN membership for a trunk port. Select one of the following:
-None—The port has no untagged VLAN membership. The PVID for the 
port is set to the default VLAN ID.
-Default—The Native VLAN equals the default VLAN. The PVID for the 
port is also set to the default VLAN ID.
-User defined—The VLAN ID you specify is used as the untagged VLAN 
membership for the Trunk port. The PVID for the port is also set to the 
specified VLAN ID.
•Access VLAN—(Access ports only) An access port can be a member of 
only one VLAN, the Access VLAN. The port VLAN ID is set to the Access 
VLAN ID. 
						

							VLAN Management
Configuring VL AN Interface Settings
Cisco Small Business SG200 Series 8-port Smart Switch 106
5
 
•Frame Type—Specifies the frame type accepted on the port:
-Admit Untagged Only—Only untagged frames are accepted on the 
port. Tagged frames are discarded.
-Admit Tagged Only—Only tagged frames are accepted on the port. 
Untagged frames are discarded.
-Admit All—Both tagged and untagged frames are accepted on the port. 
An access port can admit untagged frames only. A trunk port can be 
assigned to only one untagged VLAN, called the native VL AN and, can be 
assigned to any number of tagged VLANs (or none). If a trunk port is member 
of both untagged and tagged VLANs, it admits all frame types. If the trunk 
port is member of tagged VLANs only, it admits tagged frames only. 
•Ingress Filtering—Select to enable ingress filtering on the port. When 
ingress filtering is enabled, the switch accepts frames only from the VLANs 
of which it is a member. It discards frames received from other VLANs. All 
ports in access or trunk mode will always have their Ingress Filtering 
enabled. Disabling and enabling Ingress Filtering is only available on ports 
set to General Mode. 
•VLAN Priority—The default 802.1p priority value for the port. The value will 
be applied to the incoming packets based on the QoS trust mode configured 
at the port and the types of the packets. See QoS Properties for information 
and instructions on configuring the port trust mode.
STEP  3Click Apply and then click Close. Your changes are saved to the Running 
Configuration.
Changing the Interface VLAN Mode
When the interface VLAN mode of a port is changed, the switch automatically 
handles the affected VLAN membership configuration, as follows:
Changing from Access Port to Trunk Port
The VLAN configuration remains unchanged. The Access port VLAN becomes the 
native VLAN for the Trunk port. The port must follow the restrictions for Trunk 
ports. 
						

							VLAN Management
Configuring VL AN Interface Settings
Cisco Small Business SG200 Series 8-port Smart Switch 107
5
 
Changing from Trunk Port to Access Port
If the original trunk port has an untagged VLAN member on the port, the port is 
removed from all its VLANs except the untagged VLAN on the port. The PVID is 
set to the untagged VLAN ID.
If the original Trunk port does not have an untagged VLAN member on the port, the 
port is removed from all its VLANs and becomes a member of the default VLAN. Its 
PVID is set to the default VLAN ID and the port is set to admit only untagged or 
priority-tagged packets. The port is untagged for the default VLAN.
Changing from Access Port to General Port
The VLAN configuration remains unchanged except that the port can now admit all 
frames. As a General port, it can be a tagged or an untagged member of any 
VLAN.
Changing from General Port to Access Port
If the General port has no untagged VLAN membership that provides the PVID for 
the port, when the port is changed to an Access port it is removed from all the 
General ports VLANs and becomes an untagged member of the default VLAN. 
The Access port PVID is set to the default VLAN.
The Access port admits only untagged or priority-tagged packets.
Changing from Trunk Port to General Port
The VLAN configuration remains unchanged. As a General port, the port can be a 
tagged or an untagged member of any VLAN.
Changing from General Port to Trunk Port
The VLAN configuration remains unchanged. The PVID of the General port is used 
to configure the native VLAN of the Trunk port. The port must follow the 
restrictions of the Trunk port.
For example, assume a General port is an untagged member of VLANs 1, 10, and 
20, and the port’s PVID is 1. 
When the port is changed to a Trunk port, VLAN 1 becomes the native VLAN. The 
Trunk port remains a member of VLANs 10 and 20, but now with tagging enabled.
Deleting a VLAN
When a VLAN is deleted, the following actions occur:
•If the deleted VLAN was a Trunk port’s native VLAN, the trunk port’s native 
VLAN and PVID are changed to the default VLAN. 
						

							VLAN Management
Configuring VL AN Membership
Cisco Small Business SG200 Series 8-port Smart Switch 108
5
 
•If an Access port was a member of the deleted VLAN, the Access port 
becomes a member of the default VLAN and its PVID is changed to the 
default VLAN.
•If a General port was configured to use the VLAN ID as its PVID, the General 
port’s PVID is changed to the default VLAN ID. No other VLAN memberships 
are changed.
Configuring VLAN Membership
You can use these pages to view and configure VLAN memberships:
•The Por t to VL AN page enables you to select a VLAN and configure its 
member ports. See Configuring Port to VLAN.
•The Por t VL AN Membership page enables you to select a port and 
configure it as a member of one or more VLANs. See Configuring Port 
VLAN Membership.
By default, all ports are members of VLAN 1. You can change the VLAN 
membership of any port. VLAN memberships can be configured as tagged or 
untagged. 
•If the switch receives an untagged frame from a VLAN, the switch will insert 
a VLAN tag before forwarding the frame to the egress ports that are 
configured as tagged members of the VLAN. 
•If the switch receives an untagged frame from a VLAN, the switch will 
forward the frame as is to egress ports that are configured as untagged 
members of the VLAN.
•If the switch receives a tagged frame from a VLAN, the switch will remove 
the VLAN tag before forwarding the frame to the egress ports that are 
configured as untagged members of the VLAN. 
•If the switch receives a tagged frame from a VLAN, the switch will forward 
the frame as is to egress ports that are configured as tagged members of 
the VLAN. 
						

							VLAN Management
Configuring VL AN Membership
Cisco Small Business SG200 Series 8-port Smart Switch 109
5
 
Configuring Port to VLAN
Use the Por t to VL AN page to:
•Configure ports as members of a selected VLAN.
•Specify that when a port receives packets from the selected VLAN, the 
packets are tagged with the VLAN ID upon forwarding.
•Specify that the selected VLAN ID serves as the port VLAN ID (i.e., the 
selected VLAN ID is added when the port forwards packets that it receives 
with no VLAN membership).
To configure port VLAN memberships:
STEP 1Click VLAN Management > Port To VLAN in the navigation window.
The configured interface port mode (access, trunk, or general) of each port affects 
how the port can be assigned to VLANs. See Configuring VLAN Interface 
Settings for instructions on configuring the port mode setting.
STEP  2Select the VLAN ID to configure and use the Interface Type list to display either 
ports or LAGs.
STEP  3For each interface, configure the following parameters:
•Member—Check this box if a port is to be member of the VLAN. Uncheck 
this box if a port is not to be member of the VLAN. A port is not member of 
the VLAN by default. 
•Tagged—Select Tagged if all the packets of the VLAN egress to the port are 
to be tagged. Otherwise, select Untagged. A trunk port is tagged by default. 
This option is only relevant if the port is a member of the VLAN. 
•Untagged—Select Untagged if the packets from the VLAN egress to the 
port are to be untagged. Otherwise, select Tagged. An access port is always 
untagged. A general port is untagged by default. This option is relevant only 
if the port is a member of the VLAN.
•PVID—Check this box if a port is to use the selected VLAN ID as its port 
VLAN ID (PVID). Otherwise, uncheck this box. If PVID is selected for an 
access or trunk port, the port must be an untagged member of the VLAN. 
Untagged packets received from the port will be assigned to the 
corresponding VLAN.
STEP  4Click Apply. Your changes are saved to the Running Configuration. 
						

							VLAN Management
Configuring VL AN Membership
Cisco Small Business SG200 Series 8-port Smart Switch 110
5
 
Configuring Port VLAN Membership
To configure VLAN settings for ports:
STEP 1Click VLAN Management > Port VLAN Membership in the navigation window.
By default , the page displays VLAN information for each port. You can use the filter 
settings to display the VLAN information for LAG ports. The page displays the 
interface VLAN mode (Trunk, Access, or General), the PVID, and the VLAN 
membership(s). If a port is a member of multiple VLANs, you can select the port 
and click Detail to display this information for a single port.
STEP  2Select a port or LAG to configure and click Edit.
STEP  3To assign or remove a VLAN membership, use the arrow buttons as described 
below.
•To add a VLAN membership: Click a VLAN in the Available list, change its 
Tagging properties if needed (see below), and then click the right-arrow 
button to move it to the Selected list. 
•To remove a VLAN membership: Click a VLAN in the Selected list, and then 
click the left-arrow button to move it to the Available list. 
Tagging and PVID Properties
Depending on the interface VLAN mode (Trunk, Access, or General), when you 
select a VLAN in the Available list, you can specify the following properties for the 
interface before moving the VLAN to the Selected list for the interface.
•Membership—The interface can be configured as a tagged or untagged 
member of the selected VLAN.
-Tagged—If selected, the port is a tagged member of the selected VLAN. 
When the switch forwards packets it receives for this VLAN through this 
interface, it adds the VLAN ID to the packet.
-Untagged—If selected, the port will be an untagged member of the 
selected VLAN. When the switch forwards packets for this VLAN through 
this interface, it does not add the VLAN ID to the packet.
If the interface VLAN mode is General, you can select either option for any 
VLAN. If the interface VLAN mode is Access, only one VLAN can be selected 
and the Untagged option must be selected for the interface. If the interface 
VLAN mode is Trunk, the interface can be specified as an Untagged member 
of one VLAN and can be specified as a Tagged member of other VLANs.