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Monitoring Statistics
AP-4131 Access Point Product Reference Guide 185
3.9.2 Analyzing Retries
The AP keeps statistics of packets with multiple retries. Use these statistics to
identify severe occurrences of retries. Retries occur when the transmitting
station fails to receive an acknowledgment for a transmitted packet. This lack
of acknowledgment can result from:
• two or more stations transmitting simultaneously and causing collisions
• the receiving station moving out of range
• the receiving station being powered off.
Any one of these results causes both devices to suspend transmitting and
retries. Too many retries can indicate a system problem.
To view retry severity:
1. Select Show Misc Statistics from the Main Menu.
2. Select Retry Histogram to display the packets that experience up to 15
retries.
Retries Packets
======= =======
0 65795
1 320
2 112
3 86
4 21
5 12
6 8
7 3
8 0
9 0
10 1
11 0
12 0
13 0
14 0
15 0
3. Press any key to return to the Main Menu.
- Spectrum24 1
- AP-4131 Access Point 1
- Copyright 2
- About This Document 3
- Contents 5
- Introduction 11
- 1.2 Radio Basics 13
- 1.2.2 Cellular Coverage 18
- 8000 Hex. On 20
- 1.2.3 Site Topography 21
- Site Surveys 21
- 1.3.1 MAC Layer Bridging 23
- Filtering and Access Control 24
- 1.3.3 DHCP Support 25
- 1.3.4 Media Types 26
- 1.3.6 MU Association Process 29
- 1.3.7 Mobile IP 31
- 1.3.9 Data Encryption 35
- 1.3.11 KSS Open Enrollment 41
- 1.3.12 KSS Databases 42
- 1.3.14 Mixed Mode Security 43
- 1.3.16 Management Options 44
- Using SNMP 45
- Increased MIB Support 45
- Using the UI 46
- 2.1.4 Using a Web Browser 51
- Accessing Web Browser UI 53
- 2.2 Navigating the UI 58
- 2.2.1 Entering Admin Mode 60
- 2.3 Access Point Installation 64
- 2 and the WLAP has 71
- 3, the WLAP tracks the WLAP 71
- 20 seconds 86
- 100 seconds 86
- 5 seconds per wireless 87
- 0 - 0xFFFF range 92
- 2.6.1 40-Bit WEP Encryption 100
- Configuring the AP 101
- 2.6.2 128-Bit WEP Encryption 102
- SNMP and Mixed Mode Security 111
- Ty pe Y 117
- 2.8 ACL and Address Filtering 121
- 2.8.1 Configuring the ACL 123
- 2.8.2 Range of MUs 123
- 2.8.3 Adding Allowed MUs 125
- 2.8.4 Removing Allowed MUs 125
- 2.8.5 ACL Options 126
- 2.8.7 Load ACL from MU List 126
- 2.8.8 Load ACL from File 127
- 2.9.1 Adding Disallowed MUs 129
- 2.10.1 Adding Filter Types 130
- 2.10.2 Removing Filter Types 130
- 2.11 Clearing MUs from the AP 131
- 2.12.1 Updating Using TFTP 139
- Are You Sure? yes no Typ e Y 141
- 2.12.2 Updating Using Xmodem 142
- yes no Typ e Y 145
- 2.13 Setting Logging Options 147
- 2.14 Updating AP Firmware 149
- Firmware 152
- 2.14.2 Updating Using Xmodem 153
- to display: 157
- is displayed. Ty pe y 161
- 2.16 Performing Pings 162
- To ping another station: 163
- 2. Select Regular to display: 163
- 2.18 Saving the Configuration 166
- 2.19 Resetting the AP 167
- 2.21 Configuring Network Time 168
- Monitoring Statistics 169
- Disabled 172
- 3.2 Interface Statistics 173
- 3.3 Forwarding Counts 174
- 3.4 Mobile Units 175
- MU and select 177
- 3.5 Mobile IP 180
- 3.6 Known APs 181
- 3.7 Ethernet Statistics 184
- 3.8 Radio Statistics 186
- 1-4 range 190
- 4 digits represent the 191
- 12 digits represent 191
- 3.9 Miscellaneous Statistics 192
- 3.9.1 Analyzing Channel Use 194
- 3.9.2 Analyzing Retries 195
- 3.10 Event History 196
- 3.11 Clearing Statistics 197
- Hardware Installation 199
- 4.3 Requirements 200
- 4.4 Placing the AP 201
- 4.5 Power Options 202
- 4.6 Mounting the AP 203
- Power Input 205
- Connector 205
- 4.9 LED Indicators 208
- 4.9.1 WLAP mode LED display 209
- Special cases: 210
- 4.10 Troubleshooting 211
- 4.11 Setting Up MUs 212
- Specifications 213
- A.2 Radio Characteristics 214
- A.3 Network Characteristics 215
- Supported Modems 217
- Customer Support 219
- International Contacts 220
- Symbol Knowledge Base 220
- Additional Information 220
- Country Identification Codes 221
- Installing and Configuring 225
- Kerberos Setup Service 225
- Numerics 241
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