VLAN Management
Voice VLAN
Cisco Small Business 200 Series Smart Switch Administration Guide
184
12
Auto Smartport works with CDP/LLDP to maintain the port memberships of the
voice VLAN when voice end-points are detected from the ports:
•
When CDP and LLDP are enabled, the device sends out CDP and LLDP
packets periodically to advertise the voice VLAN to the voice endpoints to
use.
•
When a device attaching to a port advertises itself as a voice endpoint
through CDP and/or LLDP, the Auto Smartport automatically adds the port
to the voice VLAN by applying the corresponding Smartport macro to the
port (if there is no other devices from the port advertising a conflicting or
superior capability). If a device advertises itself as a phone, the default
Smartport macro is phone. If a device advertises itself as a phone and host
or phone and bridge, the default Smartport macro is phone+desktop.
Voice VLAN QoS
Voice VLAN can propagate the CoS/802.1p and DSCP settings by using LLDP-
MED Network policies. The LLDP-MED is set by default to response with the Voice
QoS setting if an appliance sends LLDP-MED packets. MED-supported devices
must send their voice traffic with the same CoS/802.1p and DSCP values, as
received with the LLDP-MED response.
You can disable the automatic update between Voice VLAN and LLDP-MED and
use his own network policies.
Working with the OUI mode, the device can additionally configure the mapping
and remarking (CoS/802.1p) of the voice traffic based on the OUI.
By default, all interfaces are CoS/802.1p trusted. The device applies the quality of
service based on the CoS/802.1p value found in the voice stream. For Telephony
OUI voice streams, you can override the quality of service and optionally remark
the 802.1p of the voice streams by specifying the desired CoS/802.1p values and
using the remarking option under Telephony OUI.
Voice VLAN Constraints
The following constraints exist:
•
Only one Voice VLAN is supported.
•
A VLAN that is defined as a Voice VLAN cannot be removed
In addition the following constraints are applicable for Telephony OUI:
•
The Voice VLAN cannot be VLAN1 (the default VLAN).
Содержание Small Business 200
Страница 1: ...Cisco Small Business 200 Series Smart Switch Administration Guide Release 1 3 ADMINISTRATION GUIDE ...
Страница 13: ...Cisco Small Business 200 Series Smart Switch Administration Guide 13 Contents ...
Страница 24: ...Getting Started Window Navigation 11 Cisco Small Business 200 Series Smart Switch Administration Guide 1 ...
Страница 38: ...Status and Statistics Managing RMON 25 Cisco Small Business 200 Series Smart Switch Administration Guide 2 ...
Страница 124: ...Administration Discovery Configuring CDP 111 Cisco Small Business 200 Series Smart Switch Administration Guide 8 ...
Страница 144: ...Port Management Configuring Green Ethernet 131 Cisco Small Business 200 Series Smart Switch Administration Guide 9 ...
Страница 182: ...Port Management PoE Configuring PoE Settings 169 Cisco Small Business 200 Series Smart Switch Administration Guide 11 ...
Страница 206: ...VLAN Management Voice VLAN 193 Cisco Small Business 200 Series Smart Switch Administration Guide 12 ...
Страница 288: ...Security Denial of Service Prevention 275 Cisco Small Business 200 Series Smart Switch Administration Guide 17 ...