User's Manual
Table Of Contents
- Cambium
- PMP 450 Operations Guide
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- PMP support website: http://www.cambiumnetworks.com/support
- Cambium main website: http://www.cambiumnetworks.com/
- Sales enquiries: solutions@cambiumnetworks.com
- Email support: support@cambiumnetworks.com
- Cambium Networks
- 3800 Golf Road, Suite 360
- Rolling Meadows, IL 60008
- Growing Your Network
- Managing Bandwidth and Authentication
- Configuring quality of service
- Maximum Information Rate (MIR) Parameters
- Token Bucket Algorithm
- Maximum Information Rate Data Entry Checking
- Bandwidth from the SM Perspective
- Interaction of Burst Allocation and Sustained Data Rate Settings
- High-priority Bandwidth
- Traffic Scheduling
- Setting the Configuration Source
- Quality of Service (QoS) Tab of the AP
- DiffServ Tab of the AP
- Quality of Service (QoS) Tab of the SM
- DiffServ Tab of the SM
- Configuring a RADIUS server
- Understanding RADIUS for PMP 450
- Choosing Authentication Mode and Configuring for Authentication Servers - AP
- SM Authentication Mode – Require RADIUS or Follow AP
- Handling Certificates
- Configuring your RADIUS servers for SM authentication
- Configuring your RADIUS server for SM configuration
- Using RADIUS for centralized AP and SM user name and password management
- RADIUS Device Data Accounting
- RADIUS Device Re-Authentication
- RADIUS Attribute Framed-IP-Address
- Configuring quality of service
- Managing the network from a Network Management Station (NMS)
- Using Informational Tabs in the GUI
- Viewing General Status (AP)
- Viewing General Status (SM)
- Viewing Session Status (AP)
- Viewing Remote Subscribers (AP)
- Interpreting messages in the Event Log
- Viewing the Network Interface Tab (All)
- Viewing the Layer 2 Neighbors Tab (AP and SM)
- Viewing the Scheduler Tab (AP and SM)
- List of Registration Failures (AP)
- Interpreting Data in the Bridging Table (All)
- Translation Table (SM)
- Interpreting Data in the Ethernet Tab (All)
- Interpreting RF Control Block Statistics in the Radio Tab (All)
- Interpreting Data in the VLAN Tab (ALL)
- Viewing Data VC Statistics (All)
- Viewing Summary Information in the Overload Tab (All)
- Viewing Filter Statistics (SM)
- Viewing ARP Statistics (SM)
- Viewing NAT Statistics (SM)
- Viewing NAT DHCP Statistics (SM)
- Interpreting Data in the GPS Status Page (AP)
- Accessing PPPoE Statistics About Customer Activities (SM)
- Viewing Bridge Control Block Statistics (All)
- Using Tools in the GUI
- Using the Spectrum Analyzer Tool
- Graphical spectrum analyzer display
- Using the AP as a Spectrum Analyzer
- Using the Remote Spectrum Analyzer Tool (AP)
- Using the Alignment Tool (SM)
- Using the Link Capacity Test Tool (AP or SM)
- Using the AP Evaluation Tool (SM)
- Using the OFDM Frame Calculator Tool for Collocation (AP or SM)
- Using the Subscriber Configuration Tool (AP)
- Reviewing the Link Status Tool Results (AP)
- Using the BER Results Tool (SM)
- Using the Throughput Monitoring Tool (AP)
- Using the Sessions Tool (AP)
- Maintaining Your Software
- Troubleshooting
- General planning for troubleshooting
- General fault isolation process
- Secondary Steps
- Procedures for Troubleshooting
- Module Has lost or does not establish connectivity
- NAT/DHCP-configured SM has lost or does not establish connectivity
- SM Does Not Register to an AP
- Module has lost or does not gain sync
- Module does not establish Ethernet connectivity
- Module does not power on
- Power supply does not produce power
- CMM does not pass proper GPS sync to connected modules
- Module Software Cannot be Upgraded
- Module Functions Properly, Except Web Interface Became Inaccessible
- Reference information
PMP 450 Operations Guide
Interaction of Burst Allocation and
Sustained Data Rate Settings
pmp-0049 (September 2012)
2-3
Maximum Information Rate Data Entry Checking
Uplink and downlink MIR is enforced as shown in Figure 1.
In these figures, entry refers to the setting in the data rate parameter, not the burst allocation
parameter.
Figure 1 Uplink and downlink rate caps adjusted to apply aggregate cap
uplink cap enforced =
uplink entry x aggregate cap for the SM
uplink entry + downlink entry
downlink cap enforced =
downlink entry x aggregate cap for the SM
uplink entry + downlink entry
Bandwidth from the SM Perspective
In the SM, normal web browsing, e-mail, small file transfers, and short streaming video are rarely rate
limited with practical bandwidth management (QoS) settings. When the SM processes large downloads
such as software upgrades and long streaming video or a series of medium-size downloads, the bucket
rapidly drains, the burst limit is reached, and some packets are delayed. The subscriber experience is
more affected in cases where the traffic is more latency sensitive.
Interaction of Burst Allocation and Sustained Data Rate
Settings
If the Burst Allocation is set to 1200 kb and the Sustained Data Rate is set to 128 kbps, a data burst of
1000 kb is transmitted at full speed because the Burst Allocation is set high enough. After the burst,
the bucket experiences a significant refill at the Sustained Data Rate. This configuration uses the
advantage of the settable Burst Allocation.
If both the Burst Allocation and the Sustained Data Rate are set to 128 kb, a burst is limited to the
Burst Allocation value. This configuration does not take advantage of the settable Burst Allocation.
If the Burst Allocation is set to 128 kb and the Sustained Data Rate is set to 256 kbps, the actual rate
will be the burst allocation (but in kbps). As above, this configuration does not take advantage of the
settable Burst Allocation.