Ruijie Networks I-Share+ Series Dimensioni

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Ruijie Networks –Innovation Beyond Networks

RG-Wlan FAQs V1.1

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Revision History

Date

Change contents

Reviser

2016.09.01

Initial Release

Amy & crystal

2017.02.01

Add 4.7 Typical Case on

Publication V1.1

Crystal

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1 Overview

This document provides a detailed description on the usage constraints of minimalist networks and the solutions to problems

that frequently occur during network deployment, in order to guide the after-sales personnel to deploy and implement minimalist

network solutions, thus improving deployment efficiency and quality.

Audience

Network Engineers

Network Administrator

Obtain Technical

Assistance

Ruijie Networks Websites : http://www.ruijienetworks.com

Ruijie Service Portal : http://case.ruijienetworks.com

Welcome to report error and give advice in any Ruijie manual to Ruijie Service Portal

Related Documents

RG-Wlan FAQs V1.1

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2 Introduction to the Index

This document collects the frequently asked questions (FAQs) about minimalist networks and provides answers by category.

Because the questions are not indexed, to search for a specific question, press the shortcut key Ctrl+Fin the document and

enter keywords of your question in the search box.

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3 Contents

1Overview ................................................................................................................................................1-3

2Introduction to the Index ........................................................................................................................2-4

3Contents.................................................................................................................................................3-5

4FAQ........................................................................................................................................................4-6

4.1 i-Share+...................................................................................................................................4-6

4.2 WIDS Features........................................................................................................................4-7

4.3 Wireless Environment............................................................................................................4-10

4.4BYOD.....................................................................................................................................4-12

4.5 Authentication........................................................................................................................4-12

4.6 Rogue AP ..............................................................................................................................4-14

4.7 Typical Case..........................................................................................................................4-16

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4 FAQ

4.1 i-Share+

Q1: Precautions for deployment

The product installation packages of the master AP and mini AP are not independently released but are released together as

a rack package. The rack package upgrade mode is similar to that of the common AP that is, released by the AC. The master

AP decompresses the version files and the mini AP is upgrade independently.

The i-Share+ AP occupies four licenses.

The i-Share+ AP supports 64 WLANs, with each mini AP supporting 8 WLANs.

By default, the i-Share+ AP supports 384 STAs. It supports up to 1024 STAs at maximum.

The gigabit uplink interfaces (interfaces 25 and 26) of the i-Share+ AP can only be accessed to the gigabit electrical interfaces

instead of 100M electrical interfaces. In addition, the rate of the uplink device must be set to gigabit or auto instead of 100M or

10M, and the duplex mode must be set to full duplex instead of half-duplex.

Q2: Does it fail to upgrade when a power failure occurs during the upgrade of the mini AP?

Answer: when mini AP is being upgraded, power failure is not allowed, otherwise mini AP may be damaged.

Q3: Can the wired interface of the mini AP be disabled by command?

Answer: Yes, you can run the no wired-interface enable command to disable it.

Q4: Do the wired interface and wireless interface support authentication separation?

Answer: Yes. The authentication mode is consistent with that of the wall-AP. You can configure the VLAN of the wired interface

using the wired-vlan.

Q5: Why can't the mini AP normally broadcast the SSID after capwap tunnel is successfully established between the

master AP and the AC?

Answer

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The versions of the master AP and the mini AP are inconsistent. As a result, the configurations cannot be normally delivered

to the mini AP.

Solution: Upgrade the i-Share+ AP to the recommended version.When the i-Share+ version is upgraded, the software versions

of the master AP and the mini AP are automatically synchronized. After the upgrade is complete, run the show version all slot

command to check whether the versions of the master AP and the mini AP are synchronized.

Q6: Why can't the uplink port of the i-Share+ AP normally negotiate with the peer device to enter the UP state?

Answer:

Cause 1: The gigabit uplink interfaces (interfaces 25 and 26) of the i-Share+ AP can only connect to 1000M electrical interfaces

and cannot connect to 100M electrical interfaces.

Solution 1: Ensure that the connected interface is a gigabit electrical interface. If the connected interface a 100M electrical

interface, the negotiation fails.

Cause 2: The rate of the uplink device must be set to gigabit or auto instead of 100M or 10M, and the duplex mode must be

set to full duplex instead of half-duplex.

Solution 2: The rate of the uplink device must be set to gigabit or auto.

4.2 WIDS Features

Q1: How to optimize WIDS when the Rogue Device Detection and containment does not work as good as expectation?

1. in a same channel

When the containment effect is not good as expectation, check whether the rogue AP and theWIDS AP use the same channel.

If not, configure them to use the same channel or specify a scanning channel (in ap-config mode, run scan-channels 802.11b

channels NUM1 NUM2…), and enable the contain of the specified channel (in ap-config mode, run countermeasures channel-

match).

2. Containment interval

The contain interval can be shortened (by default, the contain is performed once every 1s). In ap-config mode, run

countermeasures interval 100 to set the contain interval to 100 ms.

3. Unicast containment

If the contain effect is not obvious, enable the unicast contain. In the WIDS mode, run device unknown-sta dynamic-enable.

Run show wids unknown-sta to check whether any STA-MAC to be contained is learnt. You can also manually configure the

STA-MAC to be contained (device unknown-sta mac-address H.H.H). When unknown STA learning is enabled, the AP learns

the adjacent terminals. In contain mode, the contain packets are sent to the STAs using the bssid of the rogue AP. However,

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certain STAs can process the contain packets sent from the non-associated bssid, packet loss or offline state may occur.

Therefore, exercise caution when you use this function.

4. Maximum number of contains

By default, the device end can contain up to 30 rogue APs. If more than 30 rogue APs need to be contained, the maximum

number of contained APs should be increased. In ap-config mode, you can run countermeasures ap-max NUM (NUM ranges

from 1 to 256) to set the maximum number of contained APs.

5. Minimum signal strength for contain

When the contain mode is set to Rogue, by default, the contain signal strength is higher than that of the 25 dBm rogue AP. To

contain an AP with RSSI smaller than 25 dBm, you can configure countermeasures rssi-min NUM (NUM ranges from 0 to 75,

and the corresponding negative RSSI ranges from –95 to –20) in ap-config mode. In Rogue mode, the AP contains all APs not

on the friendly list. Therefore, exercise caution when you use this function.

Q2: Why doesn't the 40 MHz frequency band configured based on 802.11a take effect?

Answer: This issue may be caused by interference from other channels or incorrect channel configurations.

1. When the AP is enabled, if it detects that the channel interference is under protection, it may automatically adjust the

frequency band to 20 MHz.

2. The channel configurations maybe faulty. For the 802.11a channels, if the frequency band is set to 40 MHz, only channels

149 and 157 can be used.In China, the actual channel protection for channels 149 and 157 is channels 149+153 and

channels 157+161. If the working channel is 165, the switchover fails because no higher frequency band is available for

expansion. Therefore, when the frequency band is set to 40 MHz, the working channel should be set to channel 149 or

157.

Q3: Why is the bridge (WDS) throughput in fat AP mode of the AP620-H low?

Analysis methods:

1. Check whether the antenna interface is consistent with the connected radio interface.

2. Check whether directions of both antennas are aligned.

3. Check whether the signal RSSI reaches 50 or higher.

4. Check whether the bridging frequency band is 40 MHz.

5. Check whether the connection rate is 300 Mbit/s.

6. Check whether the MIMO antenna is correctly placed.

Solution:

1. Use the confirmed latest version.

2. Check the RSSI to determine whether the antenna is connected to the proper radio interface.

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On the root-bridge, run show dot11 ass all to check whether the RSSI is increased.

3. Launch a throughput speed testing as adjusting the antenna direction until it reaches the best performance.

4. If the co-frequency interference exists and the channel needs to be changed, use the 802.11na channels 149, 153, 157,

and 161.

5. Set the frequency band of the 802.11na channels to 40 MHZ

On the non-root-bridge, configure the corresponding radio interface.

interface dot11radio 1/0

radio-mode 11na_ht40plus

chan-width 40

channel 149

On the non-root-bridge, run show dot11 wireless 1/0 to check whether the frequency band is 40 MHz.

non-root#show dot11 wireless 1/0

WLAN ID : 0

Network Name (SSID): <NULL>

Interface.................... Dot11radio 1/0(intfcb 0x8fae800, wlan 0x8faec00)

VID.......................... 1

Mac Address.................. 001b.b120.3d0e

Operation Mode............... Access Point

802.11 State................. Associated

Beacon Period................ 100

RTS Threshold................ 2347

Fragement Threshold.......... 2346

Radio Mode................... 11na_ht40minus

Channel...................... 5765(153)

Noise Floor.................. -101 dBm

Channel width................ 40Mhz

Maximum Regulatory Tx Power.. 30 dBm

Maximum Tx Power............. 15 dBm

Minimum Tx Power............. 15 dBm

Tx power limit............... 60 dBm

Current Tx Power Level....... 17 dBm(Auto)

Protection Mode.............. 1(1-CTS/S, 2-RTS/CTS)

A-MPDU Max Length............ 0

Subframe Max Length.......... 0

A-MSDU Max Length............ 0

On the root-bridge, run show dot11 ass all to check whether the RSSI and rate are within the normal range.

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root#show dot11 associations all

INTF-IDX ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ ERP STATE CAPS HTCAPS

000:1b:b1:20:3d:0e 1 153 300M 66 120 10 27824 0x0 0x22b Es WPS

6. On the same AP, the antenna placement direction and the antenna polarization direction should be on the contrary.

Otherwise, the MIMO antennas mutually interference each other. Three antennas of the same AP should be separated

with a minimum distance of 20 cm. For example, when the outdoor pot antenna is polarized vertically, the antenna should

be placed horizontally.

4.3 Wireless Environment

Q1: Why is the AP delay increased when the RRM is enabled?

Answer: The RRM function requires thata working channel is switched over to another channel to receive and transmit neighbor

messages. After the switchover, all services of the working channel are interrupted. When you use this channel during this

period, the ping packet delay is increased. When the antenna signal is pool, packets may be lost. It is recommended that the

RRM function is disabled and used for channel adjustment only when no one is using the network.

Q2: What are limitations of the RRM channel adjustment function?

When the DCA algorithm of the RRM is enabled, the system selects an optimal channel and delivers the channel to the AP

according to the neighbor channel situations. When the AP channels are switched over, the STA is offline for a short period of

time.

By default, the DCA function of the RRM is performed only during 02:00–04:00. If the DCA operation period is changed to 20

minutes in the daytime or the DCA operation is frequently performed during the daytime, user experience is greatly affected. It

is recommended that the default configurations of the RRM remain unchanged.

Deployment limitations

When the dual-AC hot backup is deployed, the automatic RRM channel and power adjustment should be disabled. You can

manually set the AP channel and power.

Multi-WLAN deployment limitations

When 32 WLANs are configured, the management packets cannot be sent out but accumulated in the transmit queue. In

addition, certain network adapters are difficult to be associated.

Network causes: When 32 WLANs are configured, the AP sends 32 Beacon frames within one Beacon period (320 Beacon

packets are sent within 1s). When the STA sends a broadcast detection request frame, 32 detection response frames are

replied. Assume that the Beacon frame and detection response frame have 240 bytes (the actual frame size is larger than 240

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