Chapter 3: Operation
System statistics
Page
3-63
Note
450m Overload:
The 450m Series AP is designed to handle high load in terms of high throughput
and high PPS. In terms of throughput, 450m is designed to achieve 3x or more
throughput improvement over 450 and 450i Series products. In terms of packets
per second (PPS), 450m is designed to handle up to 100k PPS.
Overload occurs when the offered load exceeds the above limits. When overload
occurs, 450m will start discarding packets and TCP throughput will degrade due to
packet loss.
It’s worth noting that Frame Utilization statistics (Statistics > Frame Utilization tab:
Frame Utilization: Downlink and Uplink) are not necessarily indicative of overload
condition. They show how much the TDD frame is utilized. High frame utilization
depends on:
•
High traffic during busy periods: those statistics will be close to 100% and
almost all slots will be utilized. In this case if the Overload statistics show that
packets are discarded then this is an indication of overload condition.
•
High percentage of VCs with low modulation with moderate traffic. Those VCs
will require more slots to service them (due to low modulation) and the frame
utilization will be high. In this case the TDD frame is fully utilized but the system
is at low capacity and is not in an overload condition.
450m has higher PPS than 450 and 450i and supports higher throughput through
spatial multiplexing, therefore when a 450m replaces an overloaded 450 or 450i AP
the 450m will not be overloaded under the same conditions but the frame utilization
may still show close to 100%; this should not alarm the customer. The overload
statistics shall be monitored on 450m to see if it is overloaded or not.
Interpreting DHCP Relay statistics
The Statistics > DHCP Relay page displays requests and replies received, relayed and discarded when
the AP is configured as a DHCP relay. Typically, in a working DHCP relay configuration a one-to-one
ratio is established between requests and replies that are received and relayed. This statistics page is
only applicable for PMP (AP and SM modules) and it is explained in
Summary of Contents for PMP 450 AP
Page 51: ...Chapter 1 Configuration Quick link setup Page 1 23 ...
Page 155: ...Chapter 1 Configuration Configuring security Page 1 127 ...
Page 163: ...Chapter 1 Configuration Configuring security Page 1 135 ...
Page 164: ...Chapter 1 Configuration Configuring security Page 1 136 ...
Page 193: ...Chapter 1 Configuration Configuring radio parameters Page 1 165 ...
Page 194: ...Chapter 1 Configuration Configuring radio parameters Page 1 166 ...
Page 195: ...Chapter 1 Configuration Configuring radio parameters Page 1 167 ...
Page 206: ...Chapter 1 Configuration Configuring radio parameters Page 1 178 ...
Page 210: ...Chapter 1 Configuration Configuring radio parameters Page 1 182 ...
Page 636: ...Chapter 5 Troubleshooting Logs Page 5 16 Figure 95 SM Authorization log ...