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Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...

Hi all,I have a problem with cisco 6509 sup-2ge engine. When i'm trying to boot an IOS image from the bootflash device i received this errorWarning: Rommon NVRAM area is corrupted. Initialize the area to default valuesCat6k-MSFC2 platform with 131072...

I have been looking all over the internet searching for the airflow of the Cisco 4503 switch and I am not able to find it.There is the fan tray WS-X4593 with airflow from right to left, I want to know what is the total air flow (CFM) for these fans.A...

This is an example of the show ip cef command output from an Official Certification Guide:Switch# show ip cefPrefix                                   Next Hop                                  Interface0.0.0.0/32                              receive1...

I purchased 2 Cisco2650 (non MX version) from Ebay and to my surprise has IOS 12.4 (12) installed on both. I thought only the XM versions of 2600 series could support 12.4 and non-MX 12.3.Is the Cisco2650 actually 2650MX (It does not show/say MX anyw...

smcline06 by Level 1
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HiI would like to if users in a single vlan can be distinguished.For ex. some need internet and some dont.I have tried with access list but like to know if there are any other possiblities.Thanks in advance.

Have anybody heard about 3560 switches not processing certain packets at layer 3?From a 2960 I cannot reach a certain address ONLY. It  goes to the 3560 wireless 1410 bridges that never had a problem.This happened just as I enabled ip routing after 4...

hi all,i know on cat os system when you do config changes it directly saves to nvram but in IOS  device we used wr mem.Can someone explain me please why this happens?regardsmahesh

mahesh18 by Level 6
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I just want to say, i will be trying this out.  i just got a 881w off of ebay.  ill be using it for fun, and for a home router solution.isp(comcast)--->docsis3 modem--->881w~~~>wireless bridge in the computer room--->switch--->pc'sand isp(comcast)---...

Hi All,1. What is the cisco recommended config for access ports connecting to IP Phones, as regards to the loop protection, considering the scenario that a daisy chained PC cable can be looped back to the IP Phone? Will following suffice:spanning-tre...

Dear Friends,Just a few basic questions on dual-active setup in VSS:We have a scenario on 2 VSS chassis each of them having 1 6708 and 1 VS-720 supervisor. There are no 1G ports except the one on the supervisor.We are using 2 VSL links - one on 6708 ...

Please see the attached for diagram. My issue is that when we perform an IPerf test between two servers, somehow the traffic traverses via the firewall LAN interface ( I see the traffic on the firewall LAN interface spiking during the test) Why isn...

greycrx87 by Level 1
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