Cisco Sg2008 Manual

VLAN Management
Setting the Default VLAN
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•PVID—When this option in selected, the port uses the selected VLAN ID as 
its port VLAN ID (PVID). The port assigns the PVID to all untagged frames 
received on the port before forwarding. The following configuration rules 
apply:
-If the interface VLAN mode is General, any VLAN of which the interface is 
a Tagged or Untagged member can be selected to provide the PVID. 
-If the interface VLAN mode is...

VLAN Management
Vo i c e  a n d  M e d i a
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•The type of the original default VLAN is changed from Default to Static, and 
it can be deleted. One exception is VLAN 1. Even if it is no longer designated 
as the default VLAN, VLAN 1 cannot be deleted.
To  s e l e c t  a  d e f a u l t  V L A N :
STEP 1Click VLAN Management > Default VLAN Settings in the navigation window.
STEP  2Select the VLAN from the list.
STEP  3Click Apply.
Voice and Media...

VLAN Management
Vo i c e  a n d  M e d i a
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•Media VLAN
•Auto VoIP Sessions
Displaying and Adding Telephony OUI
The Te l e p h o n y  O U I page lists the Organizationally Unique Identifiers (OUIs) 
associated with different voice VLANs. 
To display this page, click VLAN Management > Voic e and Me dia > Te l e p h o n y  
OUI in the navigation window.
The Telephony OUI Table is preconfigured with identifiers for commonly used 
telephony...

VLAN Management
Vo i c e  a n d  M e d i a
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•Enable ports for this feature. When enabled on a port, the port is 
automatically made member of the configured voice VLAN when the switch 
receives an OUI frame (the administrator does not need to manually add the 
port as a member of the VLAN).
The Por t VL AN Membership page shows that the port is a member of the Voice 
VLAN.
To configure OUI-based Voice and Media:
STEP 1Click VLAN Management >...

VLAN Management
Vo i c e  a n d  M e d i a
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STEP 1Click VLAN Management > Voice and Media > SIP/H323 Based in the navigation 
window.
The table lists the administrative and operational statuses for SIP/H323 Auto VoIP 
on each interface, and shows the class that traffic will be assigned to. The traffic 
class corresponding to the highest priority queue on the port is chosen 
automatically.
STEP  2Use the Interface Type menu to display ports or...

VLAN Management
Vo i c e  a n d  M e d i a
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When a port is LLDP-MED enabled with network policy, the switch will advertise 
its Media VLANs in the LLDP-MED network policy TLVs out to the port. When a 
LLDP Media Endpoint is discovered, the switch will install the Media VLAN at the 
corresponding port. You can enable LLDP-MED and networking policy in the 
Administration > Discovery - LLDP pages.
Media VLAN is enabled and disabled globally. Each...

VLAN Management
Vo i c e  a n d  M e d i a
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STEP  6For Application Status, select Enable to enable priority assignment for the 
selected application. Uncheck the box to disable this feature. 
STEP  7If you enabled Application Status, enable or disable the following features:
•Untagged—Select Enable if the media device (LLDP-MED Endpoint) will 
send untagged packets. The network policy TLV from the switch must also 
indicate this expectation,...

6
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Spanning Tree
This chapter describes how to configure the Spanning Tree Protocol (STP) on the 
switch. 
It includes the following topics:
•Overview of Spanning Tree
•Configuring STP Status and Global Settings
•Configuring STP Interface Settings
•RSTP Interface Settings
Overview of Spanning Tree
STP enables efficient communication on a network that includes multiple bridges. 
Devices on these networks can learn multiple (that is, redundant)...

Spanning Tree
Configuring STP Status and Global Settings
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When the root bridge is selected and each root port is established, each network 
segment can then determine which bridge provides the lowest cost path to the 
root port. The port that provides this path is named the designated por t for the 
network segment. Spanning tree disables other ports for that network segment or 
designates them as alternate or backup ports.
Supported spanning...

Spanning Tree
Configuring STP Status and Global Settings
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•STP Operation Mode—Select one of the following STP modes: 
-Classic STP—Operates according to the original IEEE 802.1D spanning 
tree protocol.
-Rapid STP—Is the default value and provides faster spanning tree 
convergence after a topology change than does classic STP. 
•BPDU Handling—Bridge Protocol Data Units (BPDUs) are the messages 
exchanged between switches to calculate STP...