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Questions tagged [wireless]

For questions about wireless networking (802.11), including any licensed or unlicensed RF medium used to provide point-to-point or point-to-multipoint network links.

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1answer
35 views

How a wireless access point reads all the available SSIDs

When a wireless access point is broadcasting its SSID (beacon frame) I assume it sends it on specific selected channel (channel 1-14 for 2.4 GHz network). But how do all the other access point ...
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17 views

How does a router know which IP's are available in a LAN network with multiple wireless routers [closed]

Suppose I have three wireless home routers connected with each other through LAN ports like this, router 1 LAN port to Router 2 lan port, router 2 lan port to router 3 lan port. Then lets say router ...
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12 views

Commercial WiFi to local network for RV / TinyHome [closed]

Attempting to connect ~6 devices to an enterprise wifi hotspot by creating a local network to reduce sign in problems for smart TVs and IoT, however the network in question (GoWifi) has a sign in ...
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2answers
41 views

Can I set up a WLAN with a WAP but without Internet?

I was able to set up a LAN with the following configuration : A main computer (Windows PC) with a DHCP and DNS server, who is configured to have a static IP address Three devices (embedded Linux) ...
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0answers
41 views

Does Wireshark capture all Wi-Fi traffic under the same access point even with WPA encryption?

I know that free unencrypted-Wi-Fi is dangerous since all the traffic in the same AP is visible. Does Wireshark capture all Wi-Fi traffic under the same access point even with WPA encryption?
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4answers
66 views

How 802.11 LAN will avoid packet collision in a wireless medium?

Say we have a router (capable of the 802.11 protocol standards) and some number of devices that are configured to communicate with this router. I have learnt about how devices/nodes use CSMA/CA to ...
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1answer
36 views

Passive parabolic 2.4 GHz WiFi antenna to directional antenna repeater

Please excuse my lack of proficiency in this subject. I am just begining my understanding of antennas, bridges, repeaters and the like. I have a somewhat standard situation of two buildings ...
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1answer
51 views

Why do wifi devices slow down as other devices start doing work?

I've been doing some testing lately on 802.11g and I'm very confused by the results. I'll go into the details below. First please understand I'm a software developer, but not a network engineer. I ...
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1answer
41 views

ARPs in WIFI Interface Monitor Mode

I set my WIFI interface to monitor mode. I did not expect to see any ARP requests. Can someone explain why there is ARP traffic?
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1answer
26 views

How does a transmitter re-modules a wave radio to get more distant devices?

I was told that a WiFi AP re-modulates its radio signal in order to enable it to better go through obstacles and noisy places, reaching more distant client's transceivers this way. Basically, the ...
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1answer
122 views

AP won't join WLC

I have a lightweight AP AIR-AP3802I-E-K9 that I'm trying to connect to my WLC, but it just won't. When I run a debug on the WLC, I can see the Join request from my AP, and I can see my WLC sending a ...
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2answers
63 views

Functionality differences between an Wireless Access Point and a Switch?

I have a WAP connected to a switch via a twisted pair cable. Aside from the communication medium to other nodes (electrical signal vs radio waves), do they operate the same way? Specifically: When ...
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1answer
43 views

IPerf3 UDP does not meet specified bitrate [closed]

We are currently performing tests over a wireless network and are having some issues trying to get the correct configuration of iperf3. Our server side command line is as follows iperf3 -s -p 5101 ...
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2answers
48 views

Airtime efficiency

How is airtime efficiency measured? How does one increase it, decrease power consumption, and minimize the amount of RF transmitted? cf. these comments
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1answer
42 views

link asa with core switch to wlc

have 4 switch 3560 POE-8 , 2 of them have been RESET, AND w l c 2100 RESET too, but there are firewall AND ONE switch. Keeps the OLD CONFIG. I try to restore the network to the same old ...
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2answers
103 views

Is it really necessary for APs to constantly send beacon frames (always be in “discovery mode”)?

Why do wireless APs constantly transmit (e.g., with a beacon interval of 10×/sec.), even when no devices are connected to them? Doesn't that just cause needless RFI? Is it really necessary to ...
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1answer
89 views

Cisco LAP1142, usable without WLC ? Alternatives to a WLC device?

The title pretty much says it all. A charity I volunteer for was given a whole bunch Cisco 1142 ligth-weigth AP's. (A demolition guy pulled them from the building he was taken down and donated them.) ...
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2answers
73 views

Why are there so many more dual-band (2.4 & 5 GHz) Wi-Fi APs than single-band, 5GHz-only ones?

Why are so many more dual band (802.11n 2.4GHz & 802.11ac 5 GHz) APs than single-band, 5GHz-only ones? Is this for backwards compatibility?
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1answer
39 views

Hide SSID to block probe requests from clients

According to this Answer clients are sending probe requests to discover wifi networks. If I hide the SSID the AP wouldn't need to handle these probe requests and therefore the workload would be lower....
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0answers
54 views

Set up multiple WAP4410N AP with same SSID

We are facing a WiFi connection issue in the prod environment at client place (a big hall, around 200ft x 150ft). Details: Environment: 4 Cisco WAP4410N Access points mounted on the pillars in the ...
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0answers
32 views

MU-MIMO with spatially separated antennas

Assume a MU-MIMO capable wifi access point with two external antennas. The antennas are placed in two different locations. It's not possible for a wifi signal to reach (via air) from one location to ...
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2answers
60 views

Calculating maximum distance for receiving LTE signal

I work for a large retailer who recently started adding outdoor Yagi antennas to try to boost their LTE signal for their LTE based modems at each store. I wanted to see if there was a way to calculate ...
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2answers
239 views

How to connect multiple devices with identical static IP into a wireless network

I've been searching StackExchange and the Internet for a while looking for a solution for my networking question. Some articles I found are here, here and here, but these don't need to deal with a ...
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1answer
99 views

ARP spoofing over WLAN

As I understand, in ARP spoofing (of any kind), there's a man in the middle that intercepts frames from a sender (Alice) by masquerading as a receiver (Bob) and passes this frame to the server by ...
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1answer
28 views

Range of SSDP messages [closed]

I am reading about SSDP from here and here. I understand that its purpose is to advertise and discover network services. My question: Is the broadcast range of a SSDP packet local (e.g.: in a WLAN) ...
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1answer
76 views

Get WLC running-config including ALL secrets as plaintext

Our WLC 5508 pair is going EOL. I need to migrate the complete configuration (including secrets) to a new pair of CT3504 WLCs. The problem I have is when I run show run-config commands, username / ...
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41 views

What spanning tree IEEE protocol does the Cisco 1252AG Aironet access point support?

Link to data sheet We're running Cisco IOS version 15.2(2)JA1. What version of the IEEE STP is supported on the Cisco Aironet 1252AG access points? We are using the "bridge X protocol ieee" command. ...
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15 views

How to save authorization infos on UniFi Network Controller?

We have two "Ubiquiti UniFi UAP AC LITE Router". They are great! But ex.: annually, I want to upgrade the firmware on them. For this, I quickly install an Ubuntu LTS in a virtual machine, install ...
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1answer
32 views

Stable connectivity in a high-density residential WiFi environment? [closed]

I live in a densely populated area and my devices see 10-20 wifi networks at any given time. Once in every few minutes a ping to my router goes up to the point of timeout and the device loses the ...
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1answer
99 views

Has anyone successfully deployed WLC 8.3+ anchored wlan with PSK and CWA?

There seems to be something broken with Cisco WLC 8.3.140 and 143. 8.3 was the first AireOS release training to add MAC Filtering (CWA) and PSK. ISE is serving as the RADIUS server (v2.2). I can get ...
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2answers
60 views

wifi and vlans problems

I was given the task to come up with network design to change the existing one that we have since we are running a single network in the company with no VLANs in place to separate de departments. On ...
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2answers
39 views

How many public static ips do one need if a PC is behind a wireless router?

If a PC is connected to internet through a wireless router. How many public static ips do one got to get from the ISP. Do the router and PC both require one static IP. What if I want to add more PC ...
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28 views

Does mandatory/supported data rate prevent low speed clients from joining?

Let's say i have configured my wireless environment with following data rates: 6 Mbit/s -> Disabled 9 Mbit/s -> Mandatory 12 Mbit/s -> Supported 24 Mbit/s -> Mandatory 36 Mbit/s ...
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2answers
122 views

Wireless Multipoint Bridging / Backhaul Gateway Antenna and AP Selection

My company is replacing an old wireless bridging system with new 802.11ac gear. Layout is a central building with 4 remote buildings within 180 degrees line of sight. Bridging only. I think that I ...
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1answer
44 views

How cellular networks gets internet? [closed]

Mobiles get internet but how? From the towers, we used to get signals and communicate with others like calling or a message but coming to the internet how in the terms of networking terms like radio ...
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0answers
46 views

What is the difference between Power control and Power allocation? [closed]

In the context of wireless communication (specifically device-to-device communication) what is the difference between Power control and Power allocation. I guess the latter is a form of resource ...
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1answer
67 views

RV260W as Access Point

We recently upgraded to a proper firewall, with some help from this community, and are now looking to repurpose our RV260w as a wireless access point. I tried already, but I was trying to use the WAN ...
3
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1answer
72 views

Effect of physical travel on wireless connectivity [closed]

Given a stationary wireless router and a wireless device traveling from point A to B--passing directly by the router along the path--is there a speed at which the wireless device could travel to cause ...
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0answers
51 views

RPL: questions on routing mechanism

I'm studying RPL and two questions came to my mind: 1: Both in storing and non-storing modes, if a node wants to send a packet to another node via P2P communication paradigm, then how does the ...
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1answer
54 views

Routing in Wireless Ad-Hoc Networks

Let's say I have a mesh of sensors forming a wireless ad-hoc network. If one sensor wants to send data to the sink, it will transmit a packet via WiFi for example. My assumption is that there's no ...
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0answers
104 views

AIR-AP1832I-E-K9C no CiscoAirProvision SSID is showing?

Just trying to setup a AIR-AP1832I-E-K9C but no CiscoAirProvision SSID is showing? Anyone know what to try as the Mobility Express manual only has 4 steps and I have done them all and can't go any ...
3
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1answer
112 views

Does IEEE 802.11 allow soft-combining?

Out of purely theoretical curiosity, I was wondering whether the IEEE specification for WIFI allows for ARQ with soft-combining. I found a number of publications describing the benefits of soft-...
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0answers
130 views

Ad hoc vs Mesh, which one to use? [closed]

Say we have four nodes (A, B, C, D) that are arranged in a chain-like topology. A <-------> B <-------> C <-------> D Only the adjacent nodes are in range of one another (A can ...
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1answer
55 views

What does a LoRa Gateway actually do?

I have tried researching this question but I'm not quite fully understanding the benefits or true reasoning for having a Gateway. If you have two LoRa RA-02 modules they can communicate with each ...
2
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1answer
69 views

Wireless Controller 5520 Creating a dynamic interface

I'm hoping to determine the least intrusive way to configuring my WLC. I am working through the GUI interface and have created a new dynamic interface [Controller-> Interfaces] When I went to ...
2
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2answers
2k views

Cisco 899G-LTE Cellular 0 interface in spoofing mode

I have a problem. After I've reseted my router configuration it doesn't get IP from LTE SIM card. Seems like my celullar0 interface is in spoofing mode. > Router#show interfaces cellular 0 ...
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2answers
74 views

Make devices visible under Access Point

In our network, all wired PCs have a direct access to internet (83.XX.XX.XX) and a secondary IP address on the same NIC in order to access a subnetwork (192.168.10.XX) with wired peripherals (scanners,...
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1answer
28 views

WAP power profile?

Context The company I work for provides for its workers an ethernet and, for temporary visitors, a limited bandwidth/time wifi. There is a new trend in France: Wifi and RF are the devil. Question ...
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1answer
311 views

will wireless devices' MAC address be saved on layer 2 switch?

So I know that basically switches work like this (assuming 2 PCs are connected via Ethernet port) - the switch will store the mapping of the 2 PCs' MAC address and the switch ports in which they ...
6
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1answer
330 views

Why do we have authentication before association in 802.11

Why does client authenticate before associating with the AP. What does open system authentication even achieve. I fail get an accurate reason from my web searches. Best reason I do get is unlike wired ...