Service holding upon CAPWAP link disconnection

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Service holding upon CAPWAP link disconnection

1. Service holding upon CAPWAP link disconnection is applicable only to the direct forwarding mode.

2. WDS and Mesh networks do not support service holding upon CAPWAP link disconnection.

3. Security policies are open authentication and PSK authentication, without 802.1x or Portal authentication.



For V200R005, run the following commands:

[HUAWEI]wlan

[HUAWEI-wlan-view]ap id xx

[HUAWEI-wlan-ap-id]keep-service enable //Enable service holding upon CAPWAP link disconnection.

[HUAWEI-wlan-ap-id]keep-service enable allow new-access //Enable offline APs to allow access of new STAs.

[HUAWEI-wlan-ap-id]quit

[HUAWEI-wlan-view]radio-profile xx

[HUAWEI-wlan-radio-prof-xx]channel-switch announcement enable //Enable the channel switch announcement function.

[HUAWEI-wlan-radio-prof-xx]channel-switch mode continue-transmitting //Configure data transmission from STAs to continue on the current channel when the channel is switched. When an AP's channel needs to be switched, the AP notifies STAs of channel switching after a specified number of Beacon intervals, enabling the AP and STAs to switch the channel simultaneously. This prevents STAs from reassociating with the AP.



[HUAWEI-wlan-view]commit { all | ap id xx }



For V200R006, run the following commands:

[HUAWEI]wlan

[HUAWEI-wlan-view]ap-system-profile name ap-system1

[HUAWEI-wlan-system-prof-ap-system1]keep-service enable //Enable service holding upon CAPWAP link disconnection.

[HUAWEI-wlan-ap-id]keep-service enable allow new-access //Enable access of new STAs upon CAPWAP link disconnection.

[HUAWEI-wlan-ap-id]quit

[HUAWEI-wlan-view]radio-2g-profile name wlan-radio2g

[HUAWEI-wlan-radio-2g-prof-wlan-radio2g]channel-switch announcement enable //Enable the channel switch announcement function.

[HUAWEI-wlan-radio-2g-prof-wlan-radio2g]channel-switch mode continue-transmitting //Configure data transmission from STAs to continue on the current channel when the channel is switched.



Configure the preceding functions as required.

Other related questions:
How to check whether the CAPWAP link is set up?
Follow these steps : system-view [AC6605] diagnose [AC6605-diagnose] display capwap linkinfo

What are the timeout mechanism of CAPWAP links and timeout period calculation
Timeout mechanism of CAPWAP links: 1. The timeout of CAPWAP links is detected by using keepalive (UDP port 5247) and echo (UDP port 5246) packets. - The keepalive packets detect the status of Link Layer Protocols. - The echo packets detect the status of Link Control Protocols (LCPs). 2. The AP sends the keepalive and echo packets. The AC sends response packets when receiving the keepalive and echo packets. 3. After the CAPWAP enters the Run state, the AP periodically sends the keepalive and echo packets at almost the same time. This interval is configured on the AC. 4. If the AP does not receive response packets from the AC during a certain period of time, the CAPWAP link is considered faulty and enters the Down state. This interval is the timeout period. 5. If the AC does not receive the keepalive or echo packets from the AP during the timeout period, the CAPWAP link is considered faulty and enters the Down state. Timeout period calculation: The timeout of CAPWAP link mechanism uses a timer to calculate the timeout period. A timer in the system is a countdown tool. For example, the AP sends the keepalive packets every 30s. When the CAPWAP link enters Run state, the AP immediately sends a keepalive packet and repeatedly sends keepalive packets at an interval of 30s. The timeout of CAPWAP link period is also calculated using a timer. For example, when the CAPWAP link enters the Run state, the AP immediately sends a keepalive packet, and the timer starts a countdown of 120s. When the AC sends a response packet, the timer restarts the countdown of 120s. If the timer restarts the countdown and the AP does not receive any response packet from the AC, the CAPWAP link is faulty. The timeout period of echo packets is calculated in the same way as the timeout period of keepalive packets. The timer is updated immediately when an echo packet is received from the AP.

Solution if Fibre Channel links are intermittently disconnected
You can refer to the following case if Fibre Channel links are intermittently disconnected: 1. Issue Description What can I do if Fibre Channel links are intermittently disconnected? 2. Solution When the connection status of Fibre Channel links changes, you can view much information about connection between the storage system and host (or the storage system and switch) based on logs. Then you can check whether there are exceptions such as intermittent disconnection and whether the disconnection is caused by hosts or the storage system. If the disconnection is caused by hosts, check the links between the hosts and switch. If the disconnection is caused by the storage system, check the links between the storage system and switch. The following shows how the connections among the storage system, hosts, and switch are set up: a. Setting up connection between the storage system and hosts Note: The PLOGI command is used to set up connection at the FC2 layer while the PRLI command is used to set up connection to the FC4 layer. After the storage system is connected to host 0x00010b00 at the FC4 layer, a drive reports the linkup event of the port to the upper layer. b. Setting up connection between the storage system and switch Note: The commands FLOGI, PLOGI, RFT_ID, RFT_ID, RFF_ID, and SCR, are used to register the storage system on the switch. 0x000000d4 is PortID of the storage system while 0x22fffffe is PortID of the switch. After registered on the switch, the storage system can set up connection to the hosts. c. The storage system reports the linkup event. Note: A linkup event is reported after the connections between the storage system and hosts/switch are set up. d. The storage system reports the linkdown event. Note: An information TGT_LinkDown is displayed when the storage system is disconnected to the hosts or switch. e. Fibre Channel network nodes change. When the connection status of some nodes in a switch networking changes, the switch sends a registered state change notification (RSCN) to other nodes in the same domain. If the storage system receives RSCN, some hosts or storage systems are disconnected to the switch, or some new nodes are connected to the switch. Note: When the connection status of node 0x000101d4 changes, the switch sends RSCN to the storage system. In addition, the storage system sends GPN_ID to the switch to check whether node 0x000101d4 exists. If the storage system receives CT_RJT, node 0x000101d4 does not exist. Delete resources that connect to the node.

Can I hold a conference on the ViewPoint 8650C MCU when it is connected to two different and disconnected networks?
The ViewPoint 8650C MCU can be used to hold conferences when it is connected to two different and disconnected networks. However, the MCU must be deployed in GE1 port video firewall mode.

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