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Power over Ethernet
Use these commands to configure and See PoE settings using the controller CLI:
If your network contains any older Cisco 6-W switches that could be accidentally overloaded if connected directly to a 12-W access point, enter this command:
config ap power injector enable {Cisco_AP | all} installed
The access point remembers that a power injector is connected to this particular switch port. If you relocate the access point, you must reissue this command after the presence of a new power injector is verified.
Note | Ensure CDP is enabled before entering this command. Otherwise, this command will fail. See the Configuring the Cisco Discovery Protocol section for information about enabling CDP. |
Remove the safety checks and allow the access point to be connected to any switch port by entering this command:
config ap power injector enable {Cisco_AP | all} override
You can use this command if your network does not contain any older Cisco 6-W switches that could be overloaded if connected directly to a 12-W access point. The access point assumes that a power injector is always connected. If you relocate the access point, it continues to assume that a power injector is present.
If you know the MAC address of the connected switch port and do not want to automatically detect it using the installed option, enter this command:
config ap power injector enable {Cisco_AP | all} switch_port_mac_address
If you have a dual-radio 1250 series access point and want to disable one of its radios in order to enable the other radio to receive full power, enter this command:
config {802.11a | 802.11b} disable Cisco_AP
Note | You must manually reset the access point in order for the change to take effect. |
See the PoE settings for a specific access point by entering this command:
show ap config general Cisco_AP
Information similar to the following appears:
Cisco AP Identifier.............................. 1 Cisco AP Name.................................... AP1 ... PoE Pre-Standard Switch.......................... Enabled PoE Power Injector MAC Addr...................... Disabled Power Type/Mode.................................. PoE/Low Power (degraded mode) ...
The Power Type/Mode text box shows “degraded mode” if the access point is not operating at full power.
See the controller’s trap log by entering this command:
If the access point is not operating at full power, the trap contains “PoE Status: degraded operation.”
You can power an access point by a Cisco prestandard 15-W switch with Power over Ethernet (PoE) by entering this command:
config ap power pre-standard {enable | disable} {all | Cisco_AP}
The enable version of this command is required for full functionality when the access point is powered by a Cisco prestandard 15-W switch. It is safe to use if the access point is powered by either an IPM switch or a power injector or if the access point is not using one of the 15-W switches listed above.
Apr 13 09:08:24.986 spam_lrad.c:2262 LWAPP-3-MSGTAG041: AP 00:14:f1:af:f3:40 is unable to verify sufficient in-line power. Radio slot 0 disabled.
Cisco Discovery Protocol
The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs on all Cisco-manufactured equipment. A device enabled with CDP sends out periodic interface updates to a multicast address in order to make itself known to neighboring devices.
The default value for the frequency of periodic transmissions is 60 seconds, and the default advertised time-to-live value is 180 seconds. The second and latest version of the protocol, CDPv2, introduces new time-length-values (TLVs) and provides a reporting mechanism that allows for more rapid error tracking, which reduces downtime.
Note | Cisco recommends that you disable Cisco Discovery Protocol on the controller and access point when connected to non-Cisco switches as CDP is unsupported on non-Cisco switches and network elements. |
The support of CDPv1 and CDPv2 enables network management applications to discover Cisco devices.
The following TLVs are supported by both the controller and the access point:
Device-ID TLV: 0x0001—The hostname of the controller, the access point, or the CDP neighbor.
Address TLV: 0x0002—The IP address of the controller, the access point, or the CDP neighbor.
Port-ID TLV: 0x0003—The name of the interface on which CDP packets are sent out.
Capabilities TLV: 0x0004—The capabilities of the device. The controller sends out this TLV with a value of Host: 0x10, and the access point sends out this TLV with a value of Transparent Bridge: 0x02.
Version TLV: 0x0005—The software version of the controller, the access point, or the CDP neighbor.
Platform TLV: 0x0006—The hardware platform of the controller, the access point, or the CDP neighbor.
Power Available TLV: 0x001a— The amount of power available to be transmitted by power sourcing equipment to permit a device to negotiate and select an appropriate power setting.
Full/Half Duplex TLV: 0x000b—The full- or half-duplex mode of the Ethernet link on which CDP packets are sent out.
If the switch has provided power through CDP, it continues to provide only with CDP, and vice-versa with LLDP. (CSCvg86156)
Changing the CDP configuration on the controller does not change the CDP configuration on the access points that are connected to the controller. You must enable and disable CDP separately for each access point.
You can enable or disable the CDP state on all or specific interfaces and radios. This configuration can be applied to all access points or a specific access point.
The following is the behavior assumed for various interfaces and access points:
CDP is disabled on radio interfaces on indoor (nonindoor mesh) access points.
Nonmesh access points have CDPs disabled on radio interfaces when they join the controller. The persistent CDP configuration is used for the APs that had CDP support in its previous image.
CDP is enabled on radio interfaces on indoor-mesh and mesh access points.
Mesh access points will have CDP enabled on their radio interfaces when they join the controller. The persistent CDP configuration is used for the access points that had CDP support in a previous image. The CDP configuration for radio interfaces is applicable only for mesh APs.
Step 1 | Choose Controller > CDP > Global Configuration to open the CDP > Global Configuration page. | ||||
Step 2 | Select the CDP Protocol Status check box to enable CDP on the controller or unselect it to disable this feature. The default value is selected.
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Step 3 | From the CDP Advertisement Version drop-down list, choose v1 or v2 to specify the highest CDP version supported on the controller. The default value is v1. | ||||
Step 4 | In the Refresh-time Interval text box, enter the interval at which CDP messages are to be generated. The range is 5 to 254 seconds, and the default value is 60 seconds. | ||||
Step 5 | In the Holdtime text box, enter the amount of time to be advertised as the time-to-live value in generated CDP packets. The range is 10 to 255 seconds, and the default value is 180 seconds. | ||||
Step 6 | Click Apply to commit your changes. | ||||
Step 7 | Click Save Configuration to save your changes. | ||||
Step 8 | Perform one of the following:
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Step 9 | Click Save Configuration to save your changes. |
Step 1 | Enable or disable CDP on the controller by entering this command: | ||
Step 2 | Specify the interval at which CDP messages are to be generated by entering this command:
The range is 5 to 254 seconds, and the default value is 60 seconds. | ||
Step 3 | Specify the amount of time to be advertised as the time-to-live value in generated CDP packets by entering this command:
The range is 10 to 255 seconds, and the default value is 180 seconds. | ||
Step 4 | Specify the highest CDP version supported on the controller by entering this command: | ||
Step 5 | Enable or disable CDP on all access points that are joined to the controller by entering the config ap cdp {enable | disable} all command. The config ap cdp disable all command disables CDP on all access points that are joined to the controller and all access points that join in the future. CDP remains disabled on both current and future access points even after the controller or access point reboots. To enable CDP, enter the config ap cdp enable all command.
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Step 6 | Enable or disable CDP on a specific access point by entering this command: | ||
Step 7 | Configure CDP on a specific or all access points for a specific interface by entering this command: config ap cdp {ethernet | radio} interface_number slot_id {enable | disable} {all | Cisco_AP}
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Step 8 | Save your changes by entering this command: |
Step 1 | Choose Monitor > CDP > Interface Neighbors to open the CDP > Interface Neighbors page appears. This page shows the following information:
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Step 2 | Click the name of the desired interface neighbor to see more detailed information about each interface’s CDP neighbor. The CDP > Interface Neighbors > Detail page appears. | ||
Step 3 |
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Step 4 | Click the CDP Neighbors link for the desired access point to see a list of CDP neighbors for a specific access point. The CDP > AP Neighbors page appears. | ||
Step 5 | Click the name of the desired access point to see detailed information about an access point’s CDP neighbors. The CDP > AP Neighbors > Detail page appears. | ||
Step 6 | Choose Traffic Metrics to see CDP traffic information. The CDP > Traffic Metrics page appears. |
Step 1 | See the status of CDP and to view CDP protocol information by entering this command: | ||
Step 2 | See a list of all CDP neighbors on all interfaces by entering this command:
The optional detail command provides detailed information for the controller’s CDP neighbors.
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Step 3 | See all CDP entries in the database by entering this command: | ||
Step 4 | See CDP traffic information on a given port (for example, packets sent and received, CRC errors, and so on) by entering this command: | ||
Step 5 | See the CDP status for a specific access point by entering this command: | ||
Step 6 | See the CDP status for all access points that are connected to the controller by entering this command: | ||
Step 7 | See a list of all CDP neighbors for a specific access point by entering these commands: | ||
Step 8 | See a list of all CDP neighbors for all access points connected to the controller by entering these commands: |
Cisco Aironet 700 Series Access Points
The Cisco Aironet 700 Series is a compact access point that delivers secure and reliable wireless connections. The main features are:
Simultaneous dual band, dual radio with support for 2.4GHz and 5GHz.
Optimized antenna and radio designs: Consistent network transmit and receive for optimized rate versus range.
Radio resource management (RRM): Automated self-healing optimizes the unpredictability of RF to reduce dead spots and help ensure high-availability client connections.
Cisco BandSelect improves 5-GHz client connections in mixed-client environments.
Advanced security features including Rogue Detection, wIPS and Context-Aware.
The Cisco 700 series access points has four LAN ports. The configuration of these ports is stored in a file on flash. The AP retrieves the configuration when restarted. The AP then shares the information with Controller after joining so that Controller can display the updated information.
Note | The AP deletes the saved port information and applies the default configuration when the controller clears all the existing configuration on the AP. All LAN ports are disabled by default. |
Enable or disable a LAN port on the access point by entering this command: config ap lan port-id port-id {enable | disable} AP-NAME
See the port information by entering this command: showap lan port-id port-id AP-NAME
See the port summary information by entering this command: showap lan port-summary AP-NAME
In Release 7.6, there is no support for administrating the Ethernet ports or assigning them to different VLANs. All ports are mapped to the same access VLAN that AP's switch port is configured to. Alternatively, the ports are mapped to the native VLAN if port is a trunk. In 8.0 and later releases, it is possible to enable or disable the ports and map them to specific VLANs if needed. This allows traffic to be separated not only between wireless and wired networks, but also among the four Ethernet ports.
Step 1 | Enable or disable a LAN port on the access point by entering this command: config ap lan port-id port-id { enable| disable} AP-NAME |
Step 2 | Configure the port ID by entering this command: Configap lan port-id port-id AP-NAME |
Step 3 | Enable the access VLAN by entering this command: Configap lan enable accessvlanvlan-id |
Step 4 | Enable the port ID for a VLAN by entering this command: Configap lan enable accessvlanport-id |
Step 5 | Configure VLAN for the AP by entering this command: Configap lan enable accessvlanvlan-id port-id Cisco AP |