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Unied Access Point Administrator’s Guide
Unied Access Point Administrator’s Guide
Page 86
October 2013
Section 7 - Maintaining the Access Point
To capture packets on the Ethernet interface of the AP and VAP0 on radio 1 using IP port 58000, start two Wireshark
sessions and specify the following interfaces:
rpcap://192.168.1.10:58000/eth0
rpcap://192.168.1.10:58000/wlan0
When you are capturing trafc on the radio interface, you can disable beacon capture, but other 802.11 control frames
are still sent to Wireshark. You can set up a display lter to show only:
•) Data frames in the trace.
•) Trafc on specic BSSIDs.
•) Trafc between two clients.
Some examples of useful display lters are:
•) Exclude beacons and ACK/RTS/CTS frames:
!(wlan.fc.type_subtype == 8 || wlan.fc.type == 1)
•) Data frames only:
wlan.fc.type == 2
•) Trafc on a specic BSSID:
wlan.bssid == 00:02:bc:00:17:d0
•) All trafc to and from a specic client:
wlan.addr == 00:00:e8:4e:5f:8e
In remote capture mode, trafc is sent to the PC running Wireshark via one of the network interfaces. Depending on
where the Wireshark tool is located the trafc can be sent on an Ethernet interface or one of the radios. In order to
avoid a trafc ood caused by tracing the trace packets, the AP automatically installs a capture lter to lter out all
packets destined to the Wireshark application. For example if the Wireshark IP port is congured to be 58000 then the
following capture lter is automatically installed on the AP:
not portrange 58000-58004.
Enabling the packet capture feature impacts performance of the AP and can create a security issue (unauthorized
clients may be able to connect to the AP and trace user data). The AP performance is negatively impacted even if
there is no active Wireshark session with the AP. The performance is negatively impacted to a greater extent when
packet capture is in progress.
Due to performance and security issues, the packet capture mode is not saved in NVRAM on the AP; if the AP resets,
the capture mode is disabled and the you must re-enable it in order to resume capturing trafc. Packet capture
parameters (other than mode) are saved in NVRAM.
In order to minimize performance impact on the AP while trafc capture is in progress, you should install capture lters
to limit which trafc is sent to the Wireshark tool. When capturing 802.11 trafc, large portion of the captured frames
tend to be beacons (typically sent every 100ms by all Access Points). Although Wireshark supports a display lter for
beacon frames, it does not support a capture lter to prevent the AP from forwarding captured beacon packets to the
Wireshark tool. In order to reduce performance impact of capturing the 802.11 beacons, you can disable the capture
beacons mode.
The remote packet capture facility is a standard feature of the Wireshark tool for Windows.
Note: Remote packet capture is not standard on the Linux version of Wireshark; the Linux version
doesn’t work with the AP.
Wireshark is an open source tool and is available for free; it can be http://www.wireshark.org.
Figure 56 - Remote Packet Capture
The following table describes the elds to congure the packet capture status.
Содержание
- Dministrator 1
- Section 1 about this document 2
- Section 2 getting started 1 2
- Section 3 viewing access point status 2 2
- Section 4 managing the access point 5 2
- Table of contents 2
- Section 5 configuring access point services 5 3
- Section 6 configuring snmpv3 5 3
- Section 7 maintaining the access point 9 3
- Section 8 configuring client quality of service qos 8 3
- Section 9 clustering multiple aps 04 3
- Appendix a default ap settings 13 4
- Appendix b configuration examples 15 4
- Appendix c statements 27 4
- List of figures 5
- List of tables 7
- Additional documentation 9
- Document conventions 9
- Document organization 9
- Section 1 about this document 9
- Online help supported browsers and limitations 10
- Administrator s computer requirements 11
- Section 2 getting started 11
- Wireless client requirements 12
- Discovering a dynamically assigned ip address 13
- Dynamic and static ip addressing on the ap 13
- Installing the uap 13
- Recovering an ip address 13
- Basic settings 16
- Connecting to the ap web interface by using the ipv6 address 17
- Using the cli to view the ip address 17
- Configuring the ethernet settings 18
- Using the cli to configure ethernet settings 18
- Action commands 19
- Configuring ieee 802 x authentication 19
- For example 19
- If your network uses ieee 802 x see configuring ieee 802 x authentication on page 19 for information about how to configure 802 x by using the web interface 19
- In the following example the administrator uses the cli to set the management vlan id to 123 and to disable the untagged vlan so that all traffic is tagged with a vlan id 19
- October 2013 19
- On networks that use ieee 802 x port based network access control a supplicant client cannot gain access to the network until the 802 x authenticator grants access if your network uses 802 x you must configure 802 x authentication information that the ap can supply to the authenticator 19
- Section 2 getting started 19
- Set a subnet mask 19
- Set dns nameservers to use dhcp ip addressing manual to dynamic mode 19
- Set dns nameservers to use static ip addresses dynamic to manual mode 19
- Set the default gateway 19
- Set the static ip address 19
- Unified access point administrator s guide 19
- Unified access point administrator s guide page 19 19
- Use a static ip as the connection type 19
- Use dhcp as the connection type 19
- View the dns nameserver mode dynamic up manual down 19
- Using the cli to configure 802 x authentication information 20
- Verifying the installation 20
- Configuring security on the wireless access point 21
- Section 3 viewing access point status 22
- Viewing interface status 22
- Wired settings internal interface 22
- Wireless settings 22
- Configuring persistent logging options 23
- Viewing events 23
- Configuring the log relay host for kernel messages 24
- Enabling or disabling the log relay host on the events page 24
- Viewing transmit and receive statistics 25
- Viewing associated wireless client information 26
- Viewing tspec client associations 26
- Link integrity monitoring 28
- Viewing rogue ap detection 28
- Saving and importing the known ap list 30
- Viewing managed ap dhcp information 31
- Viewing tspec status and statistics information 31
- Viewing tspec ap statistics information 32
- Viewing radio statistics information 33
- Viewing email alert operational status 34
- Ethernet settings 35
- Section 4 managing the access point 35
- Wireless settings 37
- Enabling aeroscout engine support 39
- Using the 802 1h wireless mode 39
- Modifying radio settings 40
- Configuring radio and vap scheduler 44
- Scheduler association settings 46
- Virtual access point settings 47
- None plain text 50
- Static wep 50
- Ieee 802 x 51
- Wpa personal 53
- Wpa enterprise 54
- Configuring the wireless distribution system wds 56
- Wep on wds links 58
- Wpa psk on wds links 58
- Configuring a mac filter and station list on the ap 59
- Controlling access by mac authentication 59
- Configuring load balancing 60
- Configuring mac authentication on the radius server 60
- Managed access point overview 61
- Transitioning between modes 61
- Configuring managed access point settings 62
- Configuring 802 x authentication 63
- Creating a management access control list acl 64
- Section 5 configuring access point services 65
- Web server settings 65
- Configuring snmp on the access point 66
- Setting the ssh status 68
- Configuring quality of service 69
- Setting the telnet status 69
- Configuring email alert 72
- Enabling the time settings ntp 73
- Configuring snmpv3 views 75
- Section 6 configuring snmpv3 75
- Configuring snmpv3 groups 76
- Configuring snmpv3 users 77
- Configuring snmpv3 targets 78
- Saving the current configuration to a backup file 79
- Section 7 maintaining the access point 79
- Restoring the configuration from a previously saved file 80
- Performing ap maintenance 81
- Rebooting the access point 81
- Resetting the factory default configuration 81
- Upgrading the firmware 81
- Packet capture configuration and settings 83
- Packet capture status 83
- Packet capture parameter configuration 84
- Packet file capture 84
- Remote packet capture 85
- Packet capture file download 87
- Configuring vap qos parameters 88
- Section 8 configuring client quality of service qos 88
- Ipv4 and ipv6 acls 89
- Managing client qos acls 89
- Acl configuration process 90
- Mac acls 90
- Creating a diffserv class map 95
- Defining diffserv 96
- Creating a diffserv policy map 100
- Client qos status 101
- Configuring radius assigned client qos parameters 102
- October 2013 103
- Radius attribute id description type range 103
- Section 8 configuring client quality of service qos 103
- Unified access point administrator s guide 103
- Unified access point administrator s guide page 103 103
- Clustering aps 104
- Managing cluster access points in the cluster 104
- Section 9 clustering multiple aps 104
- Viewing and configuring cluster members 104
- Adding an access point to a cluster 106
- Managing cluster sessions 106
- Navigating to an ap by using its ip address in a url 106
- Navigating to configuration information for a specific ap 106
- Removing an access point from the cluster 106
- Sorting session information 107
- Configuring and viewing channel management settings 108
- Stopping starting automatic channel assignment 108
- Configuring advanced settings 109
- Viewing current channel assignments and setting locks 109
- Viewing the last proposed set of changes 109
- Viewing wireless neighborhood information 110
- Viewing details for a cluster member 112
- Appendix a default ap settings 113
- Appendix b configuration examples 115
- Configuring a vap 115
- Vap configuration from the cli 115
- Vap configuration from the web interface 115
- Configuring radio settings 116
- Vap configuration using snmp 116
- Radio configuration from the cli 117
- Radio configuration from the web interface 117
- Configuring the wireless distribution system 118
- Radio configuration using snmp 118
- Wds configuration from the web interface 118
- Clustering access points 119
- Clustering aps by using the web interface 119
- Wds configuration from the cli 119
- Wds configuration using snmp 119
- Clustering aps by using snmp 120
- Clustering aps by using the cli 120
- Configuring client qos 121
- Configuring qos by using the web interface 121
- Configuring qos by using the cli 124
- Appendix c statements 127
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