CBF Networks Inc. dba Fastback Networks 105 User Manual
IBR Installation Guide
Page 36 of 38
Doc # 770-00023.1
Jan. 23, 2015
Payload frames may be dropped by the switch (in IBR) due to a full queue or by the radio due to errors.
Frames dropped over the air are measured at the receiver. IBR reports switch and radio drops in switch
Frames dropped over the air are measured at the receiver. IBR reports switch and radio drops in switch
counters and radio counters respectively that can be viewed using CLI, SNMP and GUI as discussed below.
a. Payload dropped by the switch.
CLI:
IBR101 # show interfaces counters drops
SNMP
:
IF-MIB ifInDiscards and ifInErrors
InErrors show the packets discarded because they fail CRC check. InDiscards shows the packets
that were dropped because the output queue was full.
b. Payload dropped over the air.
Use
CLI
to show payload packet error rate and counters:
IBR101 # show interfaces radio 0 status
IBR101 # show interfaces radio 0 counters
Using SNMP, payload packet error can be seen under FBN-RADIO-MIB ibrRxPktDropRate
Using the Web UI, payload packet error rate is shown on the Monitor/Dashboard screen.
c. Frames dropped by the switch.
The switch will drop frames when the transmit queue fills. There is one transmit queue for each COS
level. Transmit queues will fill whenever the offered load exceeds either the IBR-imposed throughput
limit or the over-the-air capacity. The IBR-imposed throughput limit might be configured via a policy
level. Transmit queues will fill whenever the offered load exceeds either the IBR-imposed throughput
limit or the over-the-air capacity. The IBR-imposed throughput limit might be configured via a policy
map. Policy map configurations can be displayed with the following command:
IBR101 # show running-config
To determine if the offered load is close to the throughput use on of the following:
CLI:
IBR101 # show interfaces radio 0 status
Compare “Payload” to RX MCS S0 + RX MCS S1.
Using Web UI, view the Monitor/Radio/Report screen to view:
MCS RX Theoretical & RX Actual Throughput
MCS TX Theoretical & TX Actual Throughput
Using SNMP, FBN-RADIO-MIB:
ibrRxTputRate and ibrTxTputRate will show the payload throughput.
ibrRxTpS0+ ibrRxTpS1 and ibrTxTpS0+ ibrTxTpS1 will show carrying capacity.
A 7.
Communicating With IBR Via Command Line Interface (CLI)
CLI can be used to troubleshoot and configure IBR. The following are the steps for logging onto IBR. If IBR
has previously been configured, the field engineer will need to know the valid user name and password to
has previously been configured, the field engineer will need to know the valid user name and password to
use.
a. To communicate with IBR, log onto IBR via one of the following options:
Serial Console w/settings