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Cisco Systems 69561 manual

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Table of contents for the manual

  • Page 1

    Wireless LAN Controller (WLC) FAQ Document ID: 69561 Questions Introduction General FAQ Troubleshoot FAQ NetPro Discussion Forums − Featured Conversations Related Information Introduction This document provides information on the most frequently asked questions (FAQ) about the Cisco Wireless LAN (WLAN) Controllers (WLCs). Refer to Cisco Technical[...]

  • Page 2

    Bootloader Version............................... 4.0.217.0 Build Type....................................... DATA + WPS Compact Flash Size............................... 256 MB In order to view the active boot image, use the command show boot (Cisco Controller) > show boot Primary Boot Image............................... 4.0.217.0 (active) Bac[...]

  • Page 3

    You must reboot the WLC in order for the new software to take effect, so there is a period of network downtime. Be sure to schedule a maintenance window for the upgrade. Q. Can a Cisco IOS Software−based access point (AP) that has been converted to lightweight mode register with Cisco 4100 Series WLCs? A. No, Cisco IOS Software−based APs that a[...]

  • Page 4

    mobility group. You can configure up to 12 Wireless Services Module (WiSM) blades in one mobility group. Therefore, up to a maximum of 3600 access points (APs) are supported in a single mobility group. Q. How does DHCP work with the WLC? A. The WLC acts as a DHCP relay device. The WLC does the DHCP relay through the virtual interface. Typically, th[...]

  • Page 5

    From the Wireless Downloads page, click on Wireless LAN Controller and select the controller platform for which you need the MIBs. 1. The Software Download page for the controller appears. This page contains all the files for the WLC including the MIBs. 2. Download the standard MIBs and the Cisco specific MIBs. These two files should be downloaded [...]

  • Page 6

    Q. Which lightweight access points (LAPs) do the 4100 Series Controllers support? A. Only the Airespace 1200, 1250, the Cisco 1000 Series, and the Cisco 1500 Series LAPs work with the earlier 4100 Series Controllers. Q. I have a Cisco Adaptive Security Appliance (ASA) device. Can I use this ASA as a DHCP server instead of windows DHCP server in ord[...]

  • Page 7

    A. This is due to Cisco bug ID CSCsh58468 ( registered customers only ) . As of the latest controller version 4.0.206.0, a user can enter only 31 characters. Currently, there is no workaround for this. Q. With the Management via Wireless feature enabled on wireless LAN controllers (WLCs) in a mobility group, I can only access one WLC from that mobi[...]

  • Page 8

    Enable broadcast service set identifier (SSID) per WLANWith broadcast SSID enabled, the WLAN/SSID information is sent in the beacons. This also helps clients that perform passive scanning (those that do not transmit probe request) as well as clients configured without an SSID to associate with the controller through this WLAN. ♦ Disable Airone[...]

  • Page 9

    Q. Can the Wireless LAN Controller (WLC) send email notifications to the administrator when a critical event occurs? A. The WLC does not send email, but it can send traps to the Network Management System (NMS) stations, such as HP OpenView (HPOV). HPOV can perform things such as running scripts to send email on receipt of particular traps. HPOV is [...]

  • Page 10

    configuration to the backup controller off the production network. After the configuration is copied to the backup controller, you need to change the hostname, IP addressing information, RADIUS shared secret keys (possibly) and Mobility group lists information. Change the mobility group member, which one is listed as <Local>. 3. Transfer this[...]

  • Page 11

    Q. Is it possible to set a limit to the number of clients that connect to the access point (AP) on the AP itself? A. In general, there is no way on the AP to limit the number of clients that connect. The clients actually load balance between APs once they exceed the profile threshold value, which by default is 12 users. If you enable aggressive loa[...]

  • Page 12

    (WLCM) or Wireless Services Module (WiSM), you should be able to access the controller from the WCS and create a new admin user without logging into the controller itself. Or, if you did not save the configuration on the controller after you deleted the user, then a reboot (power cycling) of the controller should bring it back up with the deleted u[...]

  • Page 13

    Bridge AP to Normal AP. Q. I recently set up the 4402 Wireless LAN Controller (WLC) to manage the new Cisco lightweight access points (LAPs). I run PIX 501 version 6.3(5) and also use the PIX as a DHCP server for the clients. However, whenever the PIX gets a request from the controller for the wireless clients, it drops the request and the clients [...]

  • Page 14

    Q. Does the Cisco Unified Wireless solution support redundant WLCs in the DMZ for guest tunneling? A. Presently there is no support for redundant WLCs in the DMZ for guest tunneling. This is why the client does not automatically connect to the other controller in the DMZ. Q. Wireless LAN Clients associated with the lightweight access points are not[...]

  • Page 15

    MAC address. Q. No traps are generated by the WLC for Ad−Hoc rogues and the SNMP debugs on the WLC do not show any traps from the WLC for Ad−Hoc even though the WLC GUI reported the Ad−Hoc rogues. The WLC runs firmware version 3.2.116.21. Why does this happen? A. This is due to Cisco bug ID CSCse14889 ( registered customers only ) . The WLC c[...]

  • Page 16

    AP1 can hear the client that communicates to AP2, but AP2 cannot be heard. Therefore, it cannot be validated as a neighbor. ♦ The workaround is to manually set the APs to known internal on the WLC and/or WCS. Complete these steps on the controller in order to manually set the APs to known internal: Go to the WLC GUI and choose Wireless . 1. Click[...]

  • Page 17

    This command will replace the 1.1.1.1 virtual interface address, which shows up itself as the DHCP server, with the actual DHCP server IP address that you defined on the interface or in the override option of the WLAN. Q. We have a couple of Access Control Servers (ACS) that authenticate the wireless clients associated to wireless LAN controllers ([...]

  • Page 18

    Wireless − Mobility: WLAN Radio Standards Wireless − Mobility: Security and Network Management Wireless − Mobility: Getting Started with Wireless Wireless − Mobility: General Related Information Cisco Wireless LAN Controller Module Q&A • Cisco Wireless LAN Controllers Q&A • Cisco Wireless LAN Controller Configuration Guide, Rele[...]