When designing and deploying a WLAN, you will always be concerned about both coverage and capacity. Various factors can affect the coverage range of a wireless cell, and just as many factors can affect the aggregate throughput in an 802.11 WLAN. The following variables can affect the range of a WLAN:
Transmission Power Rates - The original transmission amplitude (power) will have an impact on the range of an RF cell. An access poit transmitting at 30 mW will have a larger coverage zone than an access point transmitting at 1 mW if the same antenna is used. APs with too much transmission amplitude can cause many problems, as already discussed in this chapter.
Antenna Gain - Antennas are passive-gain devices that focus the original signal. An access point transmitting at 30 mW with a 6 dBi antenna will have greater range than it would if it used only a 3 dBi antenna. If you want to increase the range for the clients, the best solution is to increase the antenna gain of the access point.
Antenna Type - Antennas have different coverage patterns. Using the right antenna will give the proper coverage and reduce multipath and nearby interference.
Wavelength - Higher frequency signals have a smaller wavelength property and will attenuate faster than a lower-frequency signal with a larger wavelength. All things being equal, 2.4 GHz access points have a greater range than 5 GHz access points due to the difference in the length of their waves.
Free Space Path Loss - In any RF environment, free space path loss (FSPL) attenuates the signal as a function of distance and frequency.
Physical Environment - Walls and other obstacles will attenuate an RF signal because of absorption and other RF propagation behaviors. A building with concrete walls will require more access points than a building with drywall because concrete is denser and attenuates the signal faster than drywall.
Capacity performance considerations are equally as important as range considerations. Please remember that 802.11 data rates are considered data bandwidth and not throughput. The following are among many variables that can affect the throughput of a WLAN:
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) - The medium access method that uses interframe spacing, physical carrier sense, virtual carrier sense, and the random back-off timer creates overhead and consumes bandiwidth. The overhead due to medium contention usually is 50 percent or greater in legacy 802.11a/b/g networks. Medium contention overhead is usually 35 percent to 40 percent in 802.11n/ac networks.
Encryption - Extra overhead is added to the body of an 802.11 data fame whenever encryption is implemented. WEP/RC4 encryption adds an extra 8 bytes of overhead per frame, TKIP/RC4 encryption adds an extra 20 bytes of overhead per frame, and CCP/AES encryption adds an extra 16 bytes of overhead per frame. Layer 3 VPNs often use DES or 3DES encrytion, both of which also consume significant bandwith. Recent gains in processing capabilities and 802.11n/ac data rates have made encryption overhead much less of an issue in recent years.
Application Use - Different types of applications have variable effects on bandwith consumption. VoWiFi and data collection scanning typically do no require a lot of bandwidth. Other applications that require file transfers or database access are often more bandwidth intensive. High definition video streaming is also bandwidth intensive.
Number of Clients - Remember that the WLAN is a shared medium. All throughput is aggregate, and all available bandwidth is shared.
Layer 2 Retransmissions - As we have discussed throughout this chapter, various problems can cause frames to become corrupted. If frames are corrupted, they will need to be retransmitted and throughput will be affected.
I've configured the wrong admin account (named it wlc01) on a new WLC during the initial wizard configuration tool. So I added a new admin account and deleted old one via CLI. I also configured an NTP server on the WLC so it will automatically synchronize the time (and digital certificate) with the AP when building its CAPWAP (DTLS) tunnel.
(Cisco Controller)
Enter User Name (or 'Recover-Config' this one-time only to reset configuration to factory defaults)
User: wlc01
Password:*************
(Cisco Controller) >config ?
802.11-a49 Configures 802.11a 4.9 subband parameters.
802.11-a58 Configures 802.11a 5.8 subband parameters.
802.11-abgn Configures 802.11-abgn parameters.
802.11a Configures 802.11a parameters.
802.11b Configures 802.11b parameters.
802.11h Configures 802.11h parameters.
aaa Configures AAA related items.
acl Configures Access Control Lists.
advanced Advanced Configuration.
ap Configures Cisco APs
assisted-roaming Configures Assisted Roaming Global Parameters.
auth-list Configures ap authorization list.
auto-configure Single command to auto-configure.
avc Configures AVC (Application Visibility and Control).
band-select Configures Band Select.
boot Configures the default boot image.
ccx-lite Enable or disable CCX-lite feature
cdp Configure Cisco Discovery Protocol
certificate Configures SSL Certificates.
client Configures a client.
coredump Configures the Core Dump Setting
--More-- or (q)uit
country Configure the countries of operation.
cts Configure Cisco TrustSec SXP Protocol
custom-web Configures the custom web authentication page.
database Configures the local database
dhcp Configures system dhcp server.
exclusionlist Manages exclusion-list.
flexconnect Configure controller flexconnect parameters.
flow Configure flow.
guest-lan Configures the Wireless LAN Network.
icons Configures the ICON details.
interface Configures system interfaces.
ipv6 Configure IPv6 related parameters.
lag Enables/Disables Link Aggregation (LAG)
ldap Configures LDAP servers (ipv4 or ipv6).
license Configure software license parameters.
linktest Configures linktest frame size and number of frames to send.
load-balancing Configures Aggressive Load Balancing.
local-auth Configures Local EAP Authentication.
location Configure Location parameters
logging Configures Logger parameters.
loginsession Manage User Connections to the Switch.
macfilter Configure static MAC filtering.
mdns Configures mDNS Services/Profiles
--More-- or (q)uit
media-stream Configure Media Stream
memory Configures memory monitoring for certain types of errors/leaks.
mesh Config mesh ap parameters.
mgmtuser Manages local management user accounts.
mobility Configures the Inter-Switch Mobility Manager
msglog Configures the system msglog parameters.
netuser Configures network user policies and local network user accounts.
network Configuration for inband connectivity.
nmheartbeat Configures the network manager heartbeat Setting
nmsp Configure NMSP parameters.
oeap-acl Configures Access Control Lists for OEAP Split Tunnel.
paging enable or disable scrolling the page.
passwd-cleartext Enable or Disable the showing of passwd in cleartext
policy Configure native profiling policy.
port Configures port mode and physical settings.
profiling Enabling Local profiling update
prompt Change the system prompt.
qos Configure qos parameter.
radius Configures RADIUS Servers.
redundancy Configure WLC redundancy parameters
remote-lan Configures Remote LAN Connections.
rf-profile Configures RF Profile parameters.
rfid Configure options for RFID tag tracking
--More-- or (q)uit
rogue Configures rogue devices.
serial EIA-232 parameters and serial port inactivity timeout.
service Modify network based services.
sessions Configure CLI session parameters.
slot Configures the slot
snmp Configures SNMP.
split-tunnel-network-list Configure split tunnel network lists. Only become active in split tunnel mode 2.
stats-timer Configures system stats timer.
switchconfig Configure parameters that apply to the switch.
sys-nas Configures the system nas id.
syslog Configures the system syslog mode.
sysname Configures the system name.
tacacs Configures TACACS+ Servers.
time Configures system time or servers.
trapflags Enable or Disable trap flags that apply to the switch.
wgb Configure WGB related parameters
wlan Configures the Wireless LAN Network.
wps Configures WPS settings.
(Cisco Controller) >config mgmtuser ?
add Creates a local management user.
delete Delete an existing management user.
description Sets the description for a management user.
password Configures a password for a management user.
telnet Configures telnet privilege for a management user.
(Cisco Controller) >config mgmtuser add ?
<username> Enter name up to 24 alphanumeric characters.
(Cisco Controller) >config mgmtuser add admin ?
<password> Enter password up to 24 alphanumeric characters.
(Cisco Controller) >config mgmtuser add admin Mypassword123 ?
lobby-admin Creates a management user with lobby ambassador privileges.
read-only Creates a management user with read-only access.
read-write Creates a management user with read-write access.
(Cisco Controller) >config mgmtuser add admin Mypassword123 read-write
(Cisco Controller) >show mgmtuser
User Name Permissions Description Password Strength Telnet Capable
----------------------- ------------ --------------------- ------------------ ----------
admin read-write Strong Yes
wlc01 read-write Strong Yes
(Cisco Controller) >config mgmtuser delete wlc01
Deleted user wlc01
(Cisco Controller) >config ?
802.11-a49 Configures 802.11a 4.9 subband parameters.
802.11-a58 Configures 802.11a 5.8 subband parameters.
802.11-abgn Configures 802.11-abgn parameters.
802.11a Configures 802.11a parameters.
802.11b Configures 802.11b parameters.
802.11h Configures 802.11h parameters.
aaa Configures AAA related items.
acl Configures Access Control Lists.
advanced Advanced Configuration.
ap Configures Cisco APs
assisted-roaming Configures Assisted Roaming Global Parameters.
auth-list Configures ap authorization list.
auto-configure Single command to auto-configure.
avc Configures AVC (Application Visibility and Control).
band-select Configures Band Select.
boot Configures the default boot image.
ccx-lite Enable or disable CCX-lite feature
cdp Configure Cisco Discovery Protocol
certificate Configures SSL Certificates.
client Configures a client.
coredump Configures the Core Dump Setting
--More-- or (q)uit
country Configure the countries of operation.
cts Configure Cisco TrustSec SXP Protocol
custom-web Configures the custom web authentication page.
database Configures the local database
dhcp Configures system dhcp server.
exclusionlist Manages exclusion-list.
flexconnect Configure controller flexconnect parameters.
flow Configure flow.
guest-lan Configures the Wireless LAN Network.
icons Configures the ICON details.
interface Configures system interfaces.
ipv6 Configure IPv6 related parameters.
lag Enables/Disables Link Aggregation (LAG)
ldap Configures LDAP servers (ipv4 or ipv6).
license Configure software license parameters.
linktest Configures linktest frame size and number of frames to send.
load-balancing Configures Aggressive Load Balancing.
local-auth Configures Local EAP Authentication.
location Configure Location parameters
logging Configures Logger parameters.
loginsession Manage User Connections to the Switch.
macfilter Configure static MAC filtering.
mdns Configures mDNS Services/Profiles
--More-- or (q)uit
media-stream Configure Media Stream
memory Configures memory monitoring for certain types of errors/leaks.
mesh Config mesh ap parameters.
mgmtuser Manages local management user accounts.
mobility Configures the Inter-Switch Mobility Manager
msglog Configures the system msglog parameters.
netuser Configures network user policies and local network user accounts.
network Configuration for inband connectivity.
nmheartbeat Configures the network manager heartbeat Setting
nmsp Configure NMSP parameters.
oeap-acl Configures Access Control Lists for OEAP Split Tunnel.
paging enable or disable scrolling the page.
passwd-cleartext Enable or Disable the showing of passwd in cleartext
policy Configure native profiling policy.
port Configures port mode and physical settings.
profiling Enabling Local profiling update
prompt Change the system prompt.
qos Configure qos parameter.
radius Configures RADIUS Servers.
redundancy Configure WLC redundancy parameters
remote-lan Configures Remote LAN Connections.
rf-profile Configures RF Profile parameters.
rfid Configure options for RFID tag tracking
--More-- or (q)uit
rogue Configures rogue devices.
serial EIA-232 parameters and serial port inactivity timeout.
service Modify network based services.
sessions Configure CLI session parameters.
slot Configures the slot
snmp Configures SNMP.
split-tunnel-network-list Configure split tunnel network lists. Only become active in split tunnel mode 2.
stats-timer Configures system stats timer.
switchconfig Configure parameters that apply to the switch.
sys-nas Configures the system nas id.
syslog Configures the system syslog mode.
sysname Configures the system name.
tacacs Configures TACACS+ Servers.
time Configures system time or servers.
trapflags Enable or Disable trap flags that apply to the switch.
wgb Configure WGB related parameters
wlan Configures the Wireless LAN Network.
wps Configures WPS settings.
(Cisco Controller) >config time ?
manual Configures the system time.
ntp Configures the Network Time Protocol.
timezone Configures the system's timezone.
(Cisco Controller) >config time ntp ?
auth Configures the NTP authentication
interval Configures the Network Time Protocol Polling Interval.
key-auth Configures the NTP authentication key.
server Configures the Network Time Protocol Servers.
(Cisco Controller) >config time ntp server ?
<index> Enter NTP server index.
(Cisco Controller) >config time ntp server 1 ?
<IP Address> Enter NTP server's IP address. Use 0.0.0.0 or :: to delete entry
(Cisco Controller) >config time ntp server 1 123.1.3.2
(Cisco Controller) >show time
Time............................................. Mon Dec 12 15:47:14 2016
Timezone delta................................... 0:0
Timezone location................................
NTP Servers
NTP Polling Interval......................... 86400
Index NTP Key Index NTP Server NTP Msg Auth Status
------- ----------------------------------------------------------------------------------
1 0 123.1.3.2 AUTH DISABLED
The remote site has around 20 lightweight APs, so I've also verified if the WLC AP license would be able to support it.
(Cisco Controller) >show license summary
License Store: Primary License Storage
StoreIndex: 0 Feature: base Version: 1.0
License Type: Permanent
License State: Active, Not in Use
License Count: Non-Counted
License Priority: Medium
License Store: Primary License Storage
StoreIndex: 1 Feature: base-ap-count Version: 1.0
License Type: Permanent
License State: Active, In Use
License Count: 25 /25 (Active/In-use)
License Priority: Medium
License Store: Evaluation License Storage
StoreIndex: 0 Feature: base-ap-count Version: 1.0
License Type: Evaluation
License State: Inactive
Evaluation total period: 12 weeks 6 days
Evaluation period left: 12 weeks 6 days
License Count: 75 / 0 (Active/In-use)
License Priority: None
(Cisco Controller) >save config
Are you sure you want to save? (y/n) y
Configuration Saved!
After the faulty WLC was replaced and the APs got registered, the APs retained its hostname and static IP addresses. So I just re-configured the SSID and its security policies.
Transmission Power Rates - The original transmission amplitude (power) will have an impact on the range of an RF cell. An access poit transmitting at 30 mW will have a larger coverage zone than an access point transmitting at 1 mW if the same antenna is used. APs with too much transmission amplitude can cause many problems, as already discussed in this chapter.
Antenna Gain - Antennas are passive-gain devices that focus the original signal. An access point transmitting at 30 mW with a 6 dBi antenna will have greater range than it would if it used only a 3 dBi antenna. If you want to increase the range for the clients, the best solution is to increase the antenna gain of the access point.
Antenna Type - Antennas have different coverage patterns. Using the right antenna will give the proper coverage and reduce multipath and nearby interference.
Wavelength - Higher frequency signals have a smaller wavelength property and will attenuate faster than a lower-frequency signal with a larger wavelength. All things being equal, 2.4 GHz access points have a greater range than 5 GHz access points due to the difference in the length of their waves.
Free Space Path Loss - In any RF environment, free space path loss (FSPL) attenuates the signal as a function of distance and frequency.
Physical Environment - Walls and other obstacles will attenuate an RF signal because of absorption and other RF propagation behaviors. A building with concrete walls will require more access points than a building with drywall because concrete is denser and attenuates the signal faster than drywall.
Capacity performance considerations are equally as important as range considerations. Please remember that 802.11 data rates are considered data bandwidth and not throughput. The following are among many variables that can affect the throughput of a WLAN:
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) - The medium access method that uses interframe spacing, physical carrier sense, virtual carrier sense, and the random back-off timer creates overhead and consumes bandiwidth. The overhead due to medium contention usually is 50 percent or greater in legacy 802.11a/b/g networks. Medium contention overhead is usually 35 percent to 40 percent in 802.11n/ac networks.
Encryption - Extra overhead is added to the body of an 802.11 data fame whenever encryption is implemented. WEP/RC4 encryption adds an extra 8 bytes of overhead per frame, TKIP/RC4 encryption adds an extra 20 bytes of overhead per frame, and CCP/AES encryption adds an extra 16 bytes of overhead per frame. Layer 3 VPNs often use DES or 3DES encrytion, both of which also consume significant bandwith. Recent gains in processing capabilities and 802.11n/ac data rates have made encryption overhead much less of an issue in recent years.
Application Use - Different types of applications have variable effects on bandwith consumption. VoWiFi and data collection scanning typically do no require a lot of bandwidth. Other applications that require file transfers or database access are often more bandwidth intensive. High definition video streaming is also bandwidth intensive.
Number of Clients - Remember that the WLAN is a shared medium. All throughput is aggregate, and all available bandwidth is shared.
Layer 2 Retransmissions - As we have discussed throughout this chapter, various problems can cause frames to become corrupted. If frames are corrupted, they will need to be retransmitted and throughput will be affected.
I've configured the wrong admin account (named it wlc01) on a new WLC during the initial wizard configuration tool. So I added a new admin account and deleted old one via CLI. I also configured an NTP server on the WLC so it will automatically synchronize the time (and digital certificate) with the AP when building its CAPWAP (DTLS) tunnel.
(Cisco Controller)
Enter User Name (or 'Recover-Config' this one-time only to reset configuration to factory defaults)
User: wlc01
Password:*************
(Cisco Controller) >config ?
802.11-a49 Configures 802.11a 4.9 subband parameters.
802.11-a58 Configures 802.11a 5.8 subband parameters.
802.11-abgn Configures 802.11-abgn parameters.
802.11a Configures 802.11a parameters.
802.11b Configures 802.11b parameters.
802.11h Configures 802.11h parameters.
aaa Configures AAA related items.
acl Configures Access Control Lists.
advanced Advanced Configuration.
ap Configures Cisco APs
assisted-roaming Configures Assisted Roaming Global Parameters.
auth-list Configures ap authorization list.
auto-configure Single command to auto-configure.
avc Configures AVC (Application Visibility and Control).
band-select Configures Band Select.
boot Configures the default boot image.
ccx-lite Enable or disable CCX-lite feature
cdp Configure Cisco Discovery Protocol
certificate Configures SSL Certificates.
client Configures a client.
coredump Configures the Core Dump Setting
--More-- or (q)uit
country Configure the countries of operation.
cts Configure Cisco TrustSec SXP Protocol
custom-web Configures the custom web authentication page.
database Configures the local database
dhcp Configures system dhcp server.
exclusionlist Manages exclusion-list.
flexconnect Configure controller flexconnect parameters.
flow Configure flow.
guest-lan Configures the Wireless LAN Network.
icons Configures the ICON details.
interface Configures system interfaces.
ipv6 Configure IPv6 related parameters.
lag Enables/Disables Link Aggregation (LAG)
ldap Configures LDAP servers (ipv4 or ipv6).
license Configure software license parameters.
linktest Configures linktest frame size and number of frames to send.
load-balancing Configures Aggressive Load Balancing.
local-auth Configures Local EAP Authentication.
location Configure Location parameters
logging Configures Logger parameters.
loginsession Manage User Connections to the Switch.
macfilter Configure static MAC filtering.
mdns Configures mDNS Services/Profiles
--More-- or (q)uit
media-stream Configure Media Stream
memory Configures memory monitoring for certain types of errors/leaks.
mesh Config mesh ap parameters.
mgmtuser Manages local management user accounts.
mobility Configures the Inter-Switch Mobility Manager
msglog Configures the system msglog parameters.
netuser Configures network user policies and local network user accounts.
network Configuration for inband connectivity.
nmheartbeat Configures the network manager heartbeat Setting
nmsp Configure NMSP parameters.
oeap-acl Configures Access Control Lists for OEAP Split Tunnel.
paging enable or disable scrolling the page.
passwd-cleartext Enable or Disable the showing of passwd in cleartext
policy Configure native profiling policy.
port Configures port mode and physical settings.
profiling Enabling Local profiling update
prompt Change the system prompt.
qos Configure qos parameter.
radius Configures RADIUS Servers.
redundancy Configure WLC redundancy parameters
remote-lan Configures Remote LAN Connections.
rf-profile Configures RF Profile parameters.
rfid Configure options for RFID tag tracking
--More-- or (q)uit
rogue Configures rogue devices.
serial EIA-232 parameters and serial port inactivity timeout.
service Modify network based services.
sessions Configure CLI session parameters.
slot Configures the slot
snmp Configures SNMP.
split-tunnel-network-list Configure split tunnel network lists. Only become active in split tunnel mode 2.
stats-timer Configures system stats timer.
switchconfig Configure parameters that apply to the switch.
sys-nas Configures the system nas id.
syslog Configures the system syslog mode.
sysname Configures the system name.
tacacs Configures TACACS+ Servers.
time Configures system time or servers.
trapflags Enable or Disable trap flags that apply to the switch.
wgb Configure WGB related parameters
wlan Configures the Wireless LAN Network.
wps Configures WPS settings.
(Cisco Controller) >config mgmtuser ?
add Creates a local management user.
delete Delete an existing management user.
description Sets the description for a management user.
password Configures a password for a management user.
telnet Configures telnet privilege for a management user.
(Cisco Controller) >config mgmtuser add ?
<username> Enter name up to 24 alphanumeric characters.
(Cisco Controller) >config mgmtuser add admin ?
<password> Enter password up to 24 alphanumeric characters.
(Cisco Controller) >config mgmtuser add admin Mypassword123 ?
lobby-admin Creates a management user with lobby ambassador privileges.
read-only Creates a management user with read-only access.
read-write Creates a management user with read-write access.
(Cisco Controller) >config mgmtuser add admin Mypassword123 read-write
(Cisco Controller) >show mgmtuser
User Name Permissions Description Password Strength Telnet Capable
----------------------- ------------ --------------------- ------------------ ----------
admin read-write Strong Yes
wlc01 read-write Strong Yes
(Cisco Controller) >config mgmtuser delete wlc01
Deleted user wlc01
(Cisco Controller) >config ?
802.11-a49 Configures 802.11a 4.9 subband parameters.
802.11-a58 Configures 802.11a 5.8 subband parameters.
802.11-abgn Configures 802.11-abgn parameters.
802.11a Configures 802.11a parameters.
802.11b Configures 802.11b parameters.
802.11h Configures 802.11h parameters.
aaa Configures AAA related items.
acl Configures Access Control Lists.
advanced Advanced Configuration.
ap Configures Cisco APs
assisted-roaming Configures Assisted Roaming Global Parameters.
auth-list Configures ap authorization list.
auto-configure Single command to auto-configure.
avc Configures AVC (Application Visibility and Control).
band-select Configures Band Select.
boot Configures the default boot image.
ccx-lite Enable or disable CCX-lite feature
cdp Configure Cisco Discovery Protocol
certificate Configures SSL Certificates.
client Configures a client.
coredump Configures the Core Dump Setting
--More-- or (q)uit
country Configure the countries of operation.
cts Configure Cisco TrustSec SXP Protocol
custom-web Configures the custom web authentication page.
database Configures the local database
dhcp Configures system dhcp server.
exclusionlist Manages exclusion-list.
flexconnect Configure controller flexconnect parameters.
flow Configure flow.
guest-lan Configures the Wireless LAN Network.
icons Configures the ICON details.
interface Configures system interfaces.
ipv6 Configure IPv6 related parameters.
lag Enables/Disables Link Aggregation (LAG)
ldap Configures LDAP servers (ipv4 or ipv6).
license Configure software license parameters.
linktest Configures linktest frame size and number of frames to send.
load-balancing Configures Aggressive Load Balancing.
local-auth Configures Local EAP Authentication.
location Configure Location parameters
logging Configures Logger parameters.
loginsession Manage User Connections to the Switch.
macfilter Configure static MAC filtering.
mdns Configures mDNS Services/Profiles
--More-- or (q)uit
media-stream Configure Media Stream
memory Configures memory monitoring for certain types of errors/leaks.
mesh Config mesh ap parameters.
mgmtuser Manages local management user accounts.
mobility Configures the Inter-Switch Mobility Manager
msglog Configures the system msglog parameters.
netuser Configures network user policies and local network user accounts.
network Configuration for inband connectivity.
nmheartbeat Configures the network manager heartbeat Setting
nmsp Configure NMSP parameters.
oeap-acl Configures Access Control Lists for OEAP Split Tunnel.
paging enable or disable scrolling the page.
passwd-cleartext Enable or Disable the showing of passwd in cleartext
policy Configure native profiling policy.
port Configures port mode and physical settings.
profiling Enabling Local profiling update
prompt Change the system prompt.
qos Configure qos parameter.
radius Configures RADIUS Servers.
redundancy Configure WLC redundancy parameters
remote-lan Configures Remote LAN Connections.
rf-profile Configures RF Profile parameters.
rfid Configure options for RFID tag tracking
--More-- or (q)uit
rogue Configures rogue devices.
serial EIA-232 parameters and serial port inactivity timeout.
service Modify network based services.
sessions Configure CLI session parameters.
slot Configures the slot
snmp Configures SNMP.
split-tunnel-network-list Configure split tunnel network lists. Only become active in split tunnel mode 2.
stats-timer Configures system stats timer.
switchconfig Configure parameters that apply to the switch.
sys-nas Configures the system nas id.
syslog Configures the system syslog mode.
sysname Configures the system name.
tacacs Configures TACACS+ Servers.
time Configures system time or servers.
trapflags Enable or Disable trap flags that apply to the switch.
wgb Configure WGB related parameters
wlan Configures the Wireless LAN Network.
wps Configures WPS settings.
(Cisco Controller) >config time ?
manual Configures the system time.
ntp Configures the Network Time Protocol.
timezone Configures the system's timezone.
(Cisco Controller) >config time ntp ?
auth Configures the NTP authentication
interval Configures the Network Time Protocol Polling Interval.
key-auth Configures the NTP authentication key.
server Configures the Network Time Protocol Servers.
(Cisco Controller) >config time ntp server ?
<index> Enter NTP server index.
(Cisco Controller) >config time ntp server 1 ?
<IP Address> Enter NTP server's IP address. Use 0.0.0.0 or :: to delete entry
(Cisco Controller) >config time ntp server 1 123.1.3.2
(Cisco Controller) >show time
Time............................................. Mon Dec 12 15:47:14 2016
Timezone delta................................... 0:0
Timezone location................................
NTP Servers
NTP Polling Interval......................... 86400
Index NTP Key Index NTP Server NTP Msg Auth Status
------- ----------------------------------------------------------------------------------
1 0 123.1.3.2 AUTH DISABLED
The remote site has around 20 lightweight APs, so I've also verified if the WLC AP license would be able to support it.
(Cisco Controller) >show license summary
License Store: Primary License Storage
StoreIndex: 0 Feature: base Version: 1.0
License Type: Permanent
License State: Active, Not in Use
License Count: Non-Counted
License Priority: Medium
License Store: Primary License Storage
StoreIndex: 1 Feature: base-ap-count Version: 1.0
License Type: Permanent
License State: Active, In Use
License Count: 25 /25 (Active/In-use)
License Priority: Medium
License Store: Evaluation License Storage
StoreIndex: 0 Feature: base-ap-count Version: 1.0
License Type: Evaluation
License State: Inactive
Evaluation total period: 12 weeks 6 days
Evaluation period left: 12 weeks 6 days
License Count: 75 / 0 (Active/In-use)
License Priority: None
(Cisco Controller) >save config
Are you sure you want to save? (y/n) y
Configuration Saved!
After the faulty WLC was replaced and the APs got registered, the APs retained its hostname and static IP addresses. So I just re-configured the SSID and its security policies.
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