HWECC and its technical principles


HWECC is a protocol stack developed by Huawei based on the OSC, ESC or extended channels for communication between NEs.
It is a Huawei proprietary protocol stack and is the most applicable and advanced ECC communication solution for Huawei transmission devices. The HWECC protocol stack distinguishes NEs by IDs and creates routes automatically. Because of this feature, HWECC protocol is easy to use. The HWECC solution is selected preferentially for providing DCN communication when only Huawei equipment, which supports the HWECC protocol, is used on a network.
It uses the shortest path first algorithm to establish ECC routes. For ECC packet forwarding, the NMS exchanges information with gateway NEs using the TCP/IP protocol, and the gateway NEs communicate with their subtending NEs using the HWECC protocol. ECC packets are forwarded based on NE IDs. In this manner, the communication between the NMS and subtending NEs is achieved.

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Principles of HSB
The AR supports the HSB function. HSB implementation involves data synchronization and traffic switching. Data synchronization is performed to ensure consistent information on the master and backup devices when the two devices are working normally. Traffic switching is performed to ensure non-stop service forwarding when the master device fails or recovers. The principle for data synchronization is to establish active and standby channels between devices that back up each other. Session entries of the master device can be synchronized to the backup device through the channel at one time, in real time, or periodically. The principle for traffic switching is based on negotiation between the master device and the backup device using VRRP. When the master device fails, a new master device is elected based on VRRP priorities and the traffic is switched to the master device. For details, see “HSB Configuration�?in AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 V200R008 CLI-based Configuration Guide - Reliability.

802.11ac and its configuration
802.11ac and its configuration (for V200R005 and later versions). 1. Prerequisites: Software version: V200R005 and later versions Hardware model: AP3030DN, AP4030DN, AP4130DN, AP8030DN, AP8130DN, AP9130DN, AP5030DN, AP5130DN, AP2030DN, AP7030DE, AP9330DN STA: 802.11ac-compliant 2. Configuration: [Huawei] wlan [Huawei-wlan-view] radio-profile name test [Huawei-wlan-radio-prof-test] channel-mode fixed //Manually configure the channel. [Huawei-wlan-radio-prof-test] 80211ac guard-interval-mode short //Change the mode to short preamble to increase rate. [Huawei-wlan-radio-prof-test] undo legacy-station enable //Reject access of traditional 802.11a/b/g STAs (supported in V200R005). [Huawei-wlan-view] quit [Huawei-wlan-view] ap xx radio 1 //Enter the AP view. Or, [Huawei] interface wlan-radio 0/0/1 //Enter the radio interface for Fat APs. [Huawei-Wlan-Radio0/0/1] channel 80mhz xx xx can be set to 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, or 161. Radio 0 of the AP2010 and AP8130DN supports the 2.4 GHz and 5 GHz frequency bands but can only work on one frequency band at a time.

802.11n and its configuration
802.11n and its configuration. As the core of the 802.11n physical layer, multiple-input multiple-output (MIMO) technology enables 802.11n to send multiple radio signals during wireless transmission and form multiple spatial streams using multipath effect. Therefore, the data transmission speed is greatly increased. In addition, MIMO helps 802.11n obtain diversity gain and multiplexing gain, effectively extending the coverage distance and improving the transmission rate. The 802.11n standard defines one to four spatial streams for MIMO technology. For example, two spatial streams improve the transmission rate by two times, and four spatial streams by four times, reaching 600 Mbit/s. The number of spatial streams varies on different products. 802.11n can operate on both 2.4 GHz and 5 GHz frequency bands. Delay will occur at the receiving end when wireless signals are transmitted in space because of multipath. If subsequent data blocks are transmitted fast, these data blocks will interfere with original ones. The general inverter (GI) is used to avoid such interference. The common GI is 800 us, while the short GI defined in the 802.11n standard is 400 us, which increases the physical connection rate by 11%. Currently, the mainstream AP products are all 802.11n-compliant. Configuration: [HUAWEI]wlan [HUAWEI-WLAN-view]radio-profile name test [HUAWEI-WLAN-radio-prof-test]channel-mode fixed //Manually configure the channel. [HUAWEI-WLAN-radio-prof-test]80211n guard-interval-mode short //Change the mode to short preamble to increase rate [HUAWEI-WLAN-radio-prof-test]undo legacy-station enable //Reject access of traditional 802.11a/b/g STAs (supported in V200R005). [HUAWEI-WLAN-radio-prof-test]quit [HUAWEI-WLAN-view]ap xx radio 1 //Enter the AP view. Or, [HUAWEI]interface wlan-radio 0/0/1 //Enter the radio interface for Fat APs. [HUAWEI-WLAN-radio-0/0/1]channel 40mhz xx xx can be set to 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, or 161. Note: 1. You are not advised to configure the 40 MHz mode on the 2.4 GHz frequency band. 2. The security profile must be configured as WPA2 + CCMP, because WEP is incompatible with 802.11n, and TKIP may affect the user access rate.

Principle of BSSID generation
Centralized BSSID management allows an AC to automatically assign a unique BSSID to each VAP. You only need to configure a carrier ID and an AC ID for an AC. Then the AC automatically assigns a BSSID to each VAP. The BSSID allows you to rapidly locate a VAP on a network. A BSSID is generated based on the AC ID, carrier ID, and WLAN ID.

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