User's Guide
Table Of Contents
- Table of Contents
- Preface
- Welcome to Extreme Campus Controller
- Dashboard
- Monitor
- Sites List
- Device List
- Access Points List
- Smart RF Widgets
- Switches List
- Networks List
- Clients
- Policy
- Configure
- Network Configuration Steps
- Sites
- Add a Site
- Modifying Site Configuration
- Site Location
- Adding Device Groups to a Site
- Add or Edit a Configuration Profile
- Associated Profiles
- Associated Networks
- Mesh Point Profile Configuration
- Configure Client Bridge
- Understand Radio Mode
- Radio as a Sensor
- Advanced AP Radio Settings
- VLAN Profile Settings
- AirDefense Profile Settings
- ExtremeLocation Profile Settings
- IoT Profile Settings
- Positioning Profile Settings
- Analytics Profile Settings
- RTLS Settings
- Advanced Configuration Profile Settings
- Configuring RF Management
- Configuring a Floor Plan
- Advanced Tab
- Devices
- Networks
- Policy
- Automatic Adoption
- ExtremeGuest Integration
- AAA RADIUS Authentication
- Onboard
- Onboard AAA Authentication
- Manage Captive Portal
- Manage Access Control Groups
- Access Control Rules
- Tools
- Administration
- System Configuration
- Manage Administrator Accounts
- Extreme Campus Controller Applications
- Product License
- Glossary
- Index
Class of Service
In general, COS refers to a set of attributes that define the importance of a frame while it is forwarded
through the network relative to other packets, and to the maximum throughput per time unit that a
client or port assigned to the role is permitted. The CoS defines actions to be taken when rate limits are
exceeded.
A role can contain default access control (VLAN) and/or Class of Service (priority) characteristics that
will be applied to trac when the rule either allows trac, or does not specifically disallow trac and
the last rule is ALLOW ALL.
Class of Service is a 3-bit field that is present in an Ethernet frame header when 802.1Q VLAN tagging is
present. The field specifies a priority value between 0 and 7, more commonly known as CS0 through
CS7. These values can be used by QoS disciplines to dierentiate and shape or police network trac.
CoS operates only on 802.1Q VLAN Ethernet at the data link layer (Layer 2), which other QoS
mechanisms (such as DiServ, also known as DSCP) operate at the IP network layer (Layer 3).
After packets are classified, they are assigned a final User Priority (UP) value, which consists of the
Priority and ToS/DSCP. Marking bits to be applied to the packet is taken from the CoS, and if the value is
not set, then the received value (ToS/DSCP) is used. ToS/DSCP Marking rewrites the Layer 3 Type of
Service (ToS) byte.
Related Topics
Configuring CoS on page 267
Configuring ToS/DSCP on page 268
Configuring CoS
The set of rules included in a role, along with any access or CoS defaults, determine how all network
trac of any client assigned to the role will be handled. For example, a Doctor role can be assigned a
higher priority CoS and default access control due to the sensitivity and urgency of services that a
doctor provides to patients.
1. Go to Configure > Policy > Class of Service.
2. Select Add, or select an existing Class of Service from the list.
3. Configure the following parameters:
Name
Naming should reflect the priority for your organization and be easily recognized by your IT
team, such as Bulk Data or Critical Data.
Priority
Define how the Layer 2 priority of the packet will be marked. Priority 0 is the highest priority.
4. For ToS/DSCP, define how the Layer 3 ToS/DSCP will be marked. Enter a hexadecimal value in the
0x (DSCP:) field, or select Configure to open the ToS/DSCP dialog box.
5. In the CoS dialog box, set the Mask value.
Mask
Select a hexadecimal value to use for the ToS/DSCP value. For example, if the mask is 0xF0, then
only the four most significant bits of the ToS of the received packets are marked. So, if the
received ToS is 0x33 and the ToS marking is set to 0x2A, then the resulting ToS is 0x23.
Configure
Class of Service
Extreme Campus Controller User Guide for version 5.46.03 267