Loud Fans 2950 Switches Lab Environment
Feb 4, 2013
I'm having some serious sound problem with some 2950 Cisco switches that I have in my CCNA lab these switches sound like a jet I've gone in and made sure the fans are clean and I even replaced one they still are too loud. So I have a few options I can run them without a fan which I really don't want to do but I want to look at two other options. The first option would be to put a heat sink on the chip that's producing heat I also thought about cutting a whole in the top and mounting a 120mm fan.
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May 26, 2011
1) I have a Cisco SG300-28P. I plan to add a SG300-52. Would it be possible to manage the new switch through the SG300-28P web browser ?
2) There are 2 fans in the POE model SG300-28P. How many fans are they in the non POE switch SG300-52 ?
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Sep 16, 2012
We're setting up a Citrix Cloudstack/XenServer environment and having a heck of a time getting VLAN communication to work with the Cisco SG300-28 switches we've got. We have 4 hosts that are running physically connected to 2 SG300-28 switches.The Guest Network NICS are running on XenServer with a VLAN configuration. As you'll see below our problem lies in that the vm on Host1 (10.1.1.254) cannot communicate to the vm on Host2 (10.1.1.5).Our SG300-28 is currently in L2 mode with Trunked ports for the NICS. It's allowed the VLAN 133 as tagged. Here's the guest networking:here's how our SG300-28 are configured for VLAN traffic GE1,2,13,14 are the connected ports with VLAN133 being one of the tagged VLANS
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May 4, 2012
Are there any manuals on how to open the srw224g4p switch? I can't find anything the switch is making a lot of noise - sound like the fan.
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Jan 2, 2013
Is it possible to run VTP V3 on 2950 and 2960 switches. If so what version of IOS supports V3? Our 2960s are running 12.2(25r)SEE1, and 2950s are running 12.1(22)EA4a. Neither of which supports v3.
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Nov 13, 2012
What is the difference between the 2950 and 2950c switches? I tried finding it on the feature navigator but I couldn't. And I wasn't able to get anything from the Cisco website either. (I didn't really look through the long PDFs, I'm sure there is a more simple way to find the answer to this that I'm not aware of.)
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Dec 7, 2011
I have a etherchannel defined between 2 L2 switches using LACP as shown below. The etherchannel works fine, however when I hard code speed/duplex on both ends the etherchannel fails. What is causing this behaviour?
SW02:
interface Port-channel5
interface GigabitEthernet1/0/1
switchport mode trunk
[Code]....
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Apr 25, 2013
I have a server windows 2008 that I would like to have a nic teaming configuration, the server has two nics, each nic is connected to a different switch. One is connected to cisco 2960 and the other is connected to cisco 2950. I have read here in forums about nic teaming but using the same switch. I have not found using different switch. Is this possible?
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May 24, 2006
I am trying to implement IP SLA. Can I implement it on layer2 switches?
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May 14, 2012
have setup a small lab as per CBTNuggets. Everything was going well until I introduced a second switch to create a trunk. Now I cannot ping between my two switches. Both show operational mode as down:
SWITCH1#show interfaces f0/12 switchport
Name: Fa0/12
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
[code]....
I have tried to allow all vlans or vlan 1 specifically and the output of the above doesn't seem to change. I am wondering if there is something in the config-register that is preventing trunking, but I don't really know enough yet!
The output of my second switch is identical to this one, the only difference is that I have it configured as a vtp client.
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Feb 18, 2011
I have a number of class-'c's as a hand-off from my data center fiber to my 2960, which then sprawls the racks with about many 2950 switches, mostly 20 machines per switch. To allow machines on one 2950 to push data to another 2950 without routing back to my ISP's router(which costs money for bandwidth) isn't is possible to trunk one port on each 2950 to another 2950 and adding a addititional vlan8 to them. Then data jumps from 2950 to 2950 without going back to the 2960 or mainly not going back to my ISP's router. Is this the correct way to accoplish this with extra vlan and trunking the 2950's to each other or am I looking at this all wrong?
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Nov 12, 2012
I am aware that private-vlans are not supported on edge switches like 2960 series - so my question is would it be possibel to ceate private vlans on say just the core switch which would be a 3570 or 4506 that supports private vlans and then just trunk these to the edge like normal vlans?what I need to achive is to have edge port not able to communicate to each other even across switches - which cannot be done using 'protected' port so need the private vlan feature?
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Oct 18, 2011
which models of HP ProCurve or Dell PowerConnect support 64-bit IF-MIB counters, or for that matter any other manufacturer (Zyxel?) (snmpv2 or v3, OID .1.3.6.1.2.1.31.1.1.1.6)I believe pretty much any Cisco Catalyst above a 2950 do, however don't believe any of the SG series do. I realize I could pick up a 2960G for $1500-2k and be good to go, but I forsee a larger switch purchase in the future, but still could use a switch in the meantime that was able to allow accurate monitoring of closet uplink bandwidth?
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Dec 8, 2011
How do you enable multicast traffic on 2900 series switches?
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Aug 27, 2012
I have more than 20 Cisco switches in my office which is basically a soap manufacturing factory. The switches include Cisco 2950, 2960, 3560, 3750 etc. We have routers also which include 2821, 2951 etc. We also have Cisco WLC 2125 and LAP 1262 series. Sometimes all these devices management comes very tough to us.
We need to log on to different devices for troubleshooting/network management which sometimes becomes very tough to us. So I wonder if there any Cisco applications or tools by which we can centrally manage all these devices.
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Mar 7, 2012
I am looking into the possibility of using private vlan's for some dmz implementations however I do have what may be some very rudimentary questions. It seems straightforward how to configure the primary/secondary vlan configuration as well as associating them. However in my case I would be looking to configure the PVLAN on a 6500-vss platform acting as the router while all of the hosts which I would desire to have in the isolated vlan would be spread out across a number of older Cisco switches which only support "protected port" setup or Procurve switches all of which I do not have budget to replace with something newer. So in my scenario I would have a 6500 connected by trunk to multiple switches which only support a protected port setup such as a Procurve (top of rack) or a Cisco 2950. As the Procurve or 2950 would not support Private VLAN setup, do I then just configure the secondary vlan to be allowed across the trunk from the 6500, configure that vlan on the Procurve or 2950 (as vtp will not foward the info for the secondary vlan) and assign that vlan to the host port as well as setting it as a protected port and this will communicate just fine across the trunk to the router as well as stopping the protected port in top of rack switch 1 from being able to communicate to a protected port in top of rack 2,3,etc? If the above scenario is what needs to be done, do I just use a regular trunk or do I have to use a PVLAN trunk?
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Mar 20, 2012
I have two routers that have problems with the fans. It is a c3725 and c3845 (Fan 3). I would like to know/confirm what are the products of these fans:
c3845: CISCO3845FANASSY= Cisco 3845 Fan Assembly and Bezel
c3725: CK-3725-FAN (external product)
In c3845 can be exchanged only the Fan 3?
In c3725 the CK-3725-FAN work?
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Dec 12, 2011
Is there a chart to show what modules will fit what swithches for fiber applications ex 2950 and 3560 switches
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Apr 3, 2012
Basically I run 3 voice gateways on 2821 routers. In two of my routers I've had fan failures, one router has had two fans die and one has had just the one.
I was going to buy the offical Cisco fan replacement kit but then I thought with such as high failure rate I'd rather buy something else and better guarentee the service to my call centres.
So, what i'm asking is:
- Is there any reason why I cannot procure a standard 80mm 12V fan with a better rating (cooling and reliability) and install this in my 2821's?
I understand this may invalidate any warranties but mine have long expired.
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Jan 14, 2008
I have a 3725 router that is reporting the following syslog message:
%FAN-3-FAN_FAILED: Fans had a rotation error reported.
When I do a show environment all, I am getting the following message:
Fan status: Warning- low fan rpm condition detected.
Both the the fans are functional and are rotating fine. How do I repair?
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Apr 22, 2013
I've just plugged in 4 Nexus5548 switches and ran through the initial setup without any issues. However, the fans seem to be stuck on full speed. At the moment they're the loudest thing in the server room.
I know this isn't the most recent OS however I was hoping to avoid updating if necessary as I don’t have the service agreement linked to my account and can’t download the update without it. Is there anything else I can try first or anything I have missed?
Software BIOS: version 3.5.0 loader: version N/A kickstart: version 5.1(3)N1(1a) system: version 5.1(3)N1(1a) power-seq: Module 1: version v1.0 Module 3: version v2.0 uC: version v1.2.0.1 SFP uC: Module 1: v1.0.0.0 BIOS compile time:
[Code]......
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Apr 5, 2012
I have a 3750-48P when plugged in has fans that spin up, but no lights on the front of the chassis. Does this mean the power supply is bad? If its bad, why do the fans power up? Also, i am not receiving any data through the console.
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Nov 1, 2012
I am currently finalising my project in Uni and in the project planning section is asks if there are any ethical considerations to be made in my project. I am conducting penetration testing on a VIRTUAL network simulator (GNS3) using Metasploit toolkit. I am guessing I will need permission to download these tools onto the university network, would that count as an ethical consideration? If not, what would I say in this section? note, all of the data I am using in the project was created by myself, and there is no other human participation.
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Jan 5, 2012
I want to create a network with a bunch of routers and switches to be used as a test network for company employees to remotely login and learn networking.I don't want this network to interfere with the rest of the network in any way.I am basically trying to create a stub network or a passive network!!
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Aug 27, 2012
I have a small business environment that uses a domain controller and supports about 50+ PCs. Starting this morning multiple computers have lost their ability to obtain an IP address. We have rebooted our domain controller and tried various fixes on local machines with no luck.
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Nov 4, 2011
I have a peachtree application installed on a standalone system and needs three other systems to connect to the shared folder to work but each time I click on show workgroup computers, it shows me a blank page on one and only shows the other system on the other.Hence when i try to connect to the peachtree folder, it give error that the system is not accessible?
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Jan 23, 2013
Currently I'm with a pure Cisco shop, running every LAN Switched infrastructure (even in the HQ datacenter) with PVST+, I'm noticing in the documentation I've read and labs I've created that RSTP is... great, and I've observed that even the uplinkfast functionality seems to be build in by just enabling rapid-pvst. Of course I'll propose a migration plan, document the network, diagram it entirely and provide effective steps to implement the change, but that's assumed from any get'go.
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Oct 4, 2011
I'm trying to use RDC to connect to my home PC from work. I've tested everything on my laptop from another network and the connection works fine but the same settings don't seem to work when I'm at work.
I'm pretty sure I have everything set up correctly. Using the default port forwarded to the desired computer.
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Feb 11, 2012
I got a $7 per month plan on a server and I have a problems with FTP connection. I am trying to upload a 20MB file with multiple folders and files in it and the connection is very choppy and I literally was not able to do that since yesterday.
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Mar 11, 2012
i am using L3MPLS VPN services from a provider.They are doing QOS, like my Voice, Data, ICMP. all traffic is classified in their network and take different paths.Now sometime when we face voice issues, simple ICMP ping , TCP ping, will not give me insight if there are any packet losses, since Voice packets are taking someother path with in MPLS cloud due to DSCP marking of Voice pack to 46.is there any tool in which i can change DSCP value of my packets and test out network response? or any monitoring tool that can do this by default?i am looking for freeware at the moment or trial
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Nov 9, 2011
question 1. in the typical active directory environment and doing wireless/wired 802.1x authentication on endpoints, should ACS join as a domain computer?
question 2. for the endpoint (domain computer) join the domain, in this case is the endpoint will trust the ACS ( also domain computer) ?
question 3. what if there's a GPO policy to install the rootCA certificate toward the endpoints. In this case, ACS should issue the CSR and let the domain CA to signed as the identity certificate? Am i correct?
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Feb 27, 2011
I am using the "File exist"-check in my Dynamic Access Policies to be sure that VPN-computers are corporate. I would like to place the file in each users %APPDATA%-directory, but it seem that the ASA cannot use variables when specifying the path? Is there a way to do this or do I have to use a absolute path in the check?I am running a ASA 5520 with sw 8.4(1).
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Feb 25, 2013
I have a domain controller witch is in a C7000 enclosure, the ethernet switch in the rear of the enclosure has channeled the ports to our core switch ( Hp procurve 5400 series ) for better bandwidth.My problem is can I give this DC 1 nic and make it accessable to 2 vlans in my enviroment. ( how do I do this )The channeling of the ehternet switch in the rear of the C7000 enclosure makes it impossible to give just that one DC access to the 2 vlans , cause the other servers also go over this line.
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