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.

25 questions with no upvoted or accepted answers
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Two-factor authentication for Wi-Fi?

We have a new requirement to have two-factor authentication for a certain SSIDs in our enterprise. Currently we run PEAP-MSCHAPv2 to pass windows credentials to a RADIUS server (NPS running on a ...
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58 views

Cisco Prime: Accurate Wi-Fi association history?

I'm running Prime 3.7 with a 2504 WLC (8.5.151.0) and am finding that the client association history under Monitor -> Clients and Users -> [select a client] does not show associations that last less ...
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52 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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45 views

Cisco Wifi phones unregistration from CUCME

I have: two Cisco Wifi access points AIR-AP1832I-E-K9 (AP1 and AP2) and two Cisco wireless phones CP-8821 (P1 and P2). Phone P1 P1 usually connects to AP1 and never connects to AP2 except if it is ...
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344 views

Cisco ISE 1.3 and 1.4 - Sponsored guest approval email - single click approval possible?

When self-registering guests generate a request to their Sponsor, how can one create a REST-based link that can approve new Guests with a single click from the email message? Has anyone successfully ...
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1answer
342 views

How do I capture an 802.11 MPDU Delimiter field?

I would like to be able to capture an MPDU Delimiter that is part of an A-MPDU, and see the contents of those 4 bytes displayed on the image below. Is there a way to do this in, for example, ...
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85 views

MAC Layer Retransmissions during the same TXOP

Back in the day I was messing around with MadWifi and, if I remember properly, after a packet was transmitted if the sender did not receive an ACK in SIFS time after the completion of the transmission,...
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3answers
99 views

Have we failed a wireless survey for something that couldnt have been offered?

On a large campus wireless network (approx. 500 APs, 4-5000 connected devices) we have been asked to create an SSID for some specific equipment that can only work on the 2.4Ghz range. No problems with ...
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23 views

How does direct sequence n-bit chipping code recover bit in the event of interference?

Say for example my data stream was 1010.Using 4-bit chipping code, with a random sequence of 0100101101011001. The XOR'd data which the receiver receives is 1011101110101001. I understand that ...
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49 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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35 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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330 views

What is difference between WMM-PS, Power Save Poll, Power Save non-Poll, Unscheduled Automatic Power Save Delivery (U-APSD)?

I am study on Power Save Mechanisms. Could you please show me what is difference between WMM-PS, Power Save Poll, Power Save non-Poll, Unscheduled Automatic Power Save Delivery (U-APSD)? and how to ...
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162 views

Wireless guest vlan issue

I am trying to separate the traffic of a wireless controller using VLANs. I have a Cisco 4400 wireless LAN controller configured to connect to the guest VLAN on an HP ProCurve 5412zl switch. The ...
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51 views

What is the state of IEEE 802.21 adoption?

I am working on heterogeneous networking in wireless networks, and the IEEE Std 802.21 (Media Independent Handover) seems to tackle some of the problems I am facing. However, I could not find ...
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115 views

How do Wi-Fi access points discard frames on adjacent channels?

Naturally, Wi-Fi devices (access points, client adapters) receive frames that were sent on an adjacent channel as these overlap, i.e., they 'see' frames that were sent on a channel that the device ...
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47 views

Who are the low-bit and high-bit users?

I am currently studying UMTS where Beam-forming antenna release(?) beam for low-bit users and high-bit users. Who are those low bit and high bit users? As I understand it, the low and high bit ...
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241 views

Which MIBs support objects for 802.11 Client Associations with Client MAC addresses?

I am trying to find the MIBs given by IETF(through RFCs) or maintained by private access point manufacturers, which support Wifi 802.11 client associations. For example my Institute uses Airespace ...
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30 views

Does tcpdump work differently from Omnipeek?

I have been trying to analyze packets using tcpdump. I am trying to use a wireless card and capture packets through monitor mode, instead of promiscuous mode, since I want to see what kind of traffic ...
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34 views

How does mesh network handles seamless roaming?

When extending a WMN to a city-wide scale one of the problem it faces is seamless handoff. So, do I need to implement one of the ticket based authentication for it to work seamlessly or will IEEE 802....
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19 views

What should I be looking out for in a wireless router to support a large number of users?

I hope this is the correct place to ask this. I was placed in charge of the network of a small business. Previously, the number of wireless devices connected to the wireless router was under 20, and ...
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1answer
48 views

Trying to setup 5Gbps setup with APC and AP

I currently have a 5Gbps line being provided and want to set up an Access Point Controller (WEC-8050) with Access Points (WEA512i) and Cisco Catalyst 2960-x 48 port, is this possible? The APC and ...
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1answer
74 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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71 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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45 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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1answer
47 views

Is the auto-correlation of a frame transient based on the physical characteristics of a device?

I am currently studying ways to fingerprint Wi-Fi devices based on their physical characteristics and I was struck by a question after reading Section B of this paper http://www.ccs-labs.org/bib/...