Comment by YLearn on Can the regulatory domain be configured on Cisco WAP571...
@Igrokit, there are separate regulatory domains with differing regulations on which frequencies/power levels can be using within their jurisdictions. Some of those require that this not be configurable...
View ArticleComment by YLearn on Usage of 192.168.xxx, 172.xxx and 10.xxx in private...
@Citizen, just like IPv6, it has to start somewhere and if enough people start pushing the idea, eventually the rest of the world will catch up to reality. Personally, whenever I interview potential...
View ArticleComment by YLearn on Why do we need machine learning for QoS classification...
What decides which DSCP value to assign to what traffic? Rather than manually configuring rules for marking traffic, why not have a program learn to do it for us?
View ArticleComment by YLearn on Lightweight AP won't join with Wireless Lan Controller
As an addition to user56700's requests, what do you see on debugs on the controller when the AP is trying to join? You also might try enabling more debugs on the AP to get additional messaging why it...
View ArticleComment by YLearn on Are there other protocols for enforcing AAA besides RADIUS?
@Notamachine, understood. Sometimes when someone mentions different implementations the follow up is "which one works best for..." types of comments. Just wanted to avoid that possibility. I would...
View ArticleComment by YLearn on How to analyze traffic made by device on local Wifi network
For 802.11 traffic, the 802.11 headers is all you really need to understand what is going on at the wireless level. If you are trying to analyze application traffic, then that would be encrypted. Even...
View ArticleComment by YLearn on PoE-safe Cable Tester
@JoelCoehoorn, get a $20 PoE tester and use it before you connect your $10 tester. If you are asking for $10 testers that are PoE safe, I have never seen one and don't expect it to exist.
View ArticleComment by YLearn on Trying to setup 5Gbps setup with APC and AP
It appears the WEC-8050 only has 4 Gig ports, so max of 4Gbps. If you are looking for a solution that can make use of your full 5Gbps, this isn't it. Btw, product recommendations are generally not on...
View ArticleComment by YLearn on What is "/mgmt/usr/bin/loginshell" in Cisco ACI?
It is one of many varieties commonly referred to as “jail shells” that provide a shell with limited access to the underlying system.
View ArticleComment by YLearn on Cisco IOS Sanitization: Any Way to Not Use NVRAM?
Instead of write memory (the default from your wr usage), have you tried doing the copy running-config flash0:/startup-config? This specifies the target for the copy command and so should not update...
View ArticleComment by YLearn on Fiber dBm transceiver power level at warning
Longer cables, attenuators, or mandrel wrapping are all solutions to lower receive power.
View ArticleComment by YLearn on Steps on troubleshooting a network
4. Check using a known working port.
View ArticleComment by YLearn on How to Change the Date on Cisco Catalyst 3750x Switch
I must point out that giving example of only using 2 NTP servers is problematic. General convention is that you use 4-5 NTP sources to provide minimal protection against falsetickers and/or sources...
View ArticleAnswer by YLearn for Airtime efficiency
How is airtime efficiency measured?Airtime efficiency with regards to 802.11 networking is some measure of how efficient the RF spectrum is utilized. There is no single standard for how to calculate...
View ArticleAnswer by YLearn for How many stack cables would be needed if we want to...
How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be...
View ArticleAnswer by YLearn for SFP/SFP+: Extender? F/F panel passthrough?
Is it possible to have a simple passive SFP/SFP+ bulkhead passthrough connector, with two female SFP/SFP+ sockets facing opposite directions and wired directly together, for a data cable entering a...
View ArticleAnswer by YLearn for Different Wi-Fi security levels under same private subnet
A company has a local subnet where everything shares the address space 192.168.0.0/8.Let me start out by stating that "shares the address space" does not equate to "shares the same subnet." Multiple...
View ArticleAnswer by YLearn for Patch Panel/Wiring Question
First of all I know older patch panels had two sides one side that you punch the Ethernet in and the other side is where the actual feeder/port of the Ethernet is, these new models have port on both...
View ArticleAnswer by YLearn for Why ICMP Destination Port Unreachable error messeage is...
Why ICMP Destination Port Unreachable error messeage is generated for unreliable UDP packets?My question would be why not? Per the RFCs, this is action is allowed. I would even go further and suggest...
View ArticleAnswer by YLearn for How does access point changing populate MAC addresses in...
Let us assume that I have a large corporate WLAN network with many access points having the same SSID. The WLAN access points are connected to each other by learning Ethernet switches....My question...
View ArticleAnswer by YLearn for How does Deep Packet Inspection work with encrypted...
As you point out, traditional DPI methods have limited ability to deal with encrypted traffic completely. They can still address encrypted traffic at a surface level at the very least, but it does tend...
View ArticleAnswer by YLearn for Cisco ISE and WLC 802.1x Non-Dynamic VLAN Placement
Looking through the configuration I now see the problem. It was also hinted at in the screenshots you provided, but I missed it until I saw it in your configuration.WLAN 1, your normal production WLAN...
View ArticleAnswer by YLearn for Why does Nmap not detect a host which is active and...
Looking at nmap documentation, you will find the following statements (emphasis added):If none of these host discovery techniques are chosen, Nmap uses a default which is equivalent to the -PE -PS443...
View ArticleAnswer by YLearn for Do all computers on a wifi network have the same Network...
If I have multiple computers on the same wifi network, is it correct that they will have the same network ID, but different host IDs?Often, but not necessarily. A WLAN operates at L2, so it really...
View ArticleAnswer by YLearn for SFP-10G-LRM compatible with Single Mode Fiber?
Generally speaking, any transceiver type that begins with "L" (for example: LR, LX, or LH) are designed to get their best range over SM fiber.In some cases they may also be used on MM fiber, typically...
View ArticleAnswer by YLearn for How does MU-MIMO allow multiple users to talk at the...
But knowing this how MU-MIMU avoids collisions?MU-MIMO makes use of multiple spatial streams and beamforming. It is actually a pretty complex operation that is taking place so maybe the best thing I...
View ArticleAnswer by YLearn for meraki bridge mode: dhcp is untagged
I believe I have found the problem based on how you have described your configuration, but your description wasn't sufficient to provide the information I needed to notice the problem. I ended up...
View ArticleAnswer by YLearn for Nmap differences between scanning with -Pn or without
Scan with -Pn it's ok, not include any ICMP packet, but the other scan, why it's trying to check the 120, 443 and 80 port when I'm say explicitly check just the 9000?First, there is no check of a 120...
View ArticleAnswer by YLearn for ISE as RADIUS server or not in EAP-TLS authentication
Does the ISE server act as a RADIUS server to a Switch proxying a supplicant certificate, or does it use some other protocol? This is for EAP-TLS based authWhenever you have an EAP based...
View ArticleAnswer by YLearn for How to determine BSSID from MAC Address
As I know BSSID is derived from MAC Address, but I have no idea how it is derived and what pattern is used.It is possible, but not any sort of requirement. It is simply often just easier for vendors to...
View ArticleAnswer by YLearn for Functionality differences between an Wireless Access...
When wireless devices communicate with each other, does the WAP have a MAC table and do the packet forwarding itself? In other words, do the data packets travel back and forth to the switch, which...
View ArticleAnswer by YLearn for Passive parabolic 2.4 GHz WiFi antenna to directional...
Would it be possible to take the signal from a passive parabolic/helical WiFi antenna (2.4g) on the hill between to the two buildings, amplify it if needed, and send it with a directional antenna to...
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Answer by YLearn for How do I know which product IOS my router has
So My question is, how do I find that product ID "SASR1K1XU-313S" if possible in my current routers CLI.You likely won't. This is simply a software license component that is only one part of what you...
View ArticleAnswer by YLearn for c9300 command state
It looks like you have the required packages in place (assuming the contents of your packages.conf file reflect these packages).The settings that look problematic to me after a quick look are the...
View ArticleAnswer by YLearn for Cisco Nexus 5500 7.3.(3)N1(1) tcl script
Any ideas?Yes. Looks like your ping syntax is wrong. To verify, exit the TCL shell and trying running the same ping command from your script substituting in an appropriate value: ping vrf XYZ...
View ArticleAnswer by YLearn for Lightweight AP won't join with Wireless Lan Controller
The software version that you are running on your WLC is not compatible with the 3700 series access points. You need to upgrade your code to at least 7.6.100.0 which is what Cisco indicates is the...
View ArticleAnswer by YLearn for Why did Netflix choose to use CIDR blocks of...
they seemed to choose to use 100.64.0.0/10 as their private network space, rather than 10.0.0.0/8 (or a subspace from it).What's the purpose? I don't see any obvious benefit, but I may miss some key...
View ArticleAnswer by YLearn for Standards for network design / installation diagramming...
My question is very simple, is there a universally recognized standard for NEWTORK design CAD symbols which will cover all possible or frequent components ( firewall, switch, router, wifi antenna, DB,...
View ArticleAnswer by YLearn for Why can't I do a reverse DNS lookup on this IP address?
Short answer: There is not requirement that IP addresses provide a reverse lookup, so there are many IP addresses that do not have any reverse DNS lookup zone associated with them.Long answer: DNS was...
View ArticleAnswer by YLearn for Where does an access network begin and end?
There may be further information about Figure 1.4 in the book itself. There may also be supplementary information in an associated publication such as a study/class guide or downloadable supplemental...
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Answer by YLearn for Four layer-2 addresses in 802.11 frame header
The distinction to understand is that while an 802.11 device is transmitting to a receiving device, either one (or both) of these devices may not be the actual source or destination of the L2 traffic....
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