User's Manual

C HAPTER 4 | Configuring the Switch
Quality of Service
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PARAMETERS
These parameters are displayed:
◆ Telephony OUI – Specifies a globally unique identifier assigned to a
vendor by IEEE to identify VoIP equipment. The OUI must be 6
characters long and the input format “xx-xx-xx” (where x is a
hexadecimal digit).
◆ Description – User-defined text that identifies the VoIP devices.
WEB INTERFACE
To configure MAC OUI numbers for VoIP equipment:
1. Click Advanced Configuration, Voice VLAN, OUI.
2. Click “Add new entry.”
3. Enter a MAC address that specifies the OUI for VoIP devices in the
network, and enter a description for the devices.
4. Click Save.
Figure 75: Configuring an OUI Telephony List
QUALITY OF SERVICE
All switches or routers that access the Internet rely on class information to
provide the same forwarding treatment to packets in the same class. Class
information can be assigned by end hosts, or switches or routers along the
path. Priority can then be assigned based on a general policy, or a detailed
examination of the packet. However, note that detailed examination of
packets should take place close to the network edge so that core switches
and routers are not overloaded.
Switches and routers along the path can use class information to prioritize
the resources allocated to different traffic classes. The manner in which an
individual device handles traffic is called per-hop behavior. All devices
along a path should be configured in a consistent manner to construct a
consistent end-to-end Quality of Service (QoS) solution.