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Questions tagged [802.1]

IEEE Standard for port-based Network Access Control

141 questions
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5 answers

What is the maximum length of a wifi access point's SSID?

I was wondering if anybody knew what the maximum string length of a browser's SSID is or where I could go to look for that sort of information. (From a spec of some sort)
leeand00
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3 answers

What happens when a consumer switch receives a VLAN-tagged Ethernet frame?

Suppose you connect a trunk port from a VLAN capable network switch to a (VLAN incapable) consumer-grade network switch via a direct cable. Now the former switch send the later switch a 802.1Q-tagged Ethernet frame. What should the later switch do?…
netvope
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4 answers

Do wifi packets go directly node to node?

I have two nodes on a wireless network. Node A is streaming data to node B. Most of the time it works fine, but sometimes there is packet loss and the stream is interrupted. To improve performance and reduce packet loss, should I move node A to be…
Richard
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17
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8 answers

What's the difference between a bridge and a switch?

I can't find any authoritative source that can concisely explain the difference between a bridge and a switch. As far as I can tell, most devices commonly referred to as "switches" fit the description of "bridge" as defined by the IEEE 802.1D…
Dan Moulding
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1 answer

linux 802.1x on a windows wired network

I'm looking to use my linux workstation on our company network, but i've been running into a few issues, specifically 802.1x i believe. I'm root on my machine and a windows domain admin so i should be able to access whatever i need to for this to…
Sirex
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9
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3 answers

Cisco and Linux and Vlans

I appear to have some fundamental misunderstanding of how VLANs work on Linux, and I'm hoping the good people here can educate me. Cast: One Cisco 3560, one VLAN, and one Linux box [1]. Cisco --------------- Linux ge0/1 eth0 The…
Darren H
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8
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3 answers

Load testing wireless LANs

Anyone have any suggestions for methods of load-testing wireless networks for enterprise network deployments? We've got a wide array of different wireless worst-case scenarios to support. rooms with either nobody or 300 people, each of whom have…
chris
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1 answer

Network Policy Server Granular Time Restrictions

I am configuring NPS as a RADIUS authentication source for my wireless clients. I am trying to differentiate between school hours and after hours as I need to connect certain users to a different network for after hours access to extra resources. I…
Littlejon
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7
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1 answer

What is the reason CSMA/CD can't be used on a wireless network?

I'm new to wireless networking and wondering why the same Collision Detection mechanisms used for Ethernet can't be applied to WiFi. I think I'm starting to understand, but not sure if I've got it: The physical characteristics of WiFi make it…
Ian Muscat
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4 answers

Wireless technology - which is better: more single radio APs or less dual radio APs?

We are currently talking to vendors of wireless solutions for a wireless deployment in a university campus with some 5000 students. One vendor is offering us a Cisco solution with a WLC 5508 controller and 69 2x2 MIMO Dual-band/Dual radio APs…
gert_78
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7
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3 answers

802.1x automatically validate certificate in windows clients

We're deploying a wireless networking using Windows Server 2008 NAC as a RADIUS server. When Windows XP or 7 clients connect they initally fail to connect. In order to enable the client to connect we have to add the network manually and un-check the…
Jona
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1 answer

802.1x computer authentication using hostname instead of cert

My configuration includes: Cisco ACS as RADIUS server, MS AD, MS PKI, Cisco 2960G switches. Workstations are 95% XP Pro SP3 fully patched, some 7 pro fully patched. Computer cert autoenrollment enabled and working. GPO for Resulting NIC settings…
Paul Ackerman
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2 answers

PXE in an 802.1X environment

My organization is about to implement 802.1X on our enterprise, but we currently use PXE-based OS deployment sequences in SCCM. I'm looking for a way to continue using PXE in an 802.1X environment. Our infrastructure uses Cisco network gear…
newmanth
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3 answers

Cisco Dot1x Port Authentication - VLAN selected based on what domain the user logs on to on computer?

Currently my company has been bought out by another. Due to this, another two companies users will be migrating into our office. It would be super handy if we could have the vlan chosen for the user based on what domain they try to login to using…
Lance
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6
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1 answer

Testing radius server from Mac OS X client

I have a radius server set up on a server running Ubuntu 11.04. I have configured my switch to use the authentication server's IP (192.168.1.2) for RADIUS / 802.1x authentication, and I created a connection to test connecting from my Mac OSX…
Calvin Froedge
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