Unmanaged switch outputs only 10MBs

Hello All,
I have a VDSL DLink router connected to a Cisco SF100D-08P. When I connect my laptop straight to the router I get 40MBPs which is my ISP's speed. When I connect the router to the switch and then the laptop to the switch I only get 10Mbps. Also my WIFI access point (also Cisco) that is connected to the switch gives me 10MBPS. Looks like port negoitiation between router and switch is not working well and settles on 10MBPS. I tried checking with difference cables, laptops etc.
Any ideas?
Thanks
Yoni

Hi Yoni, does your network connection status indicate you're connecting at 10 mbit ? Can you check the router status to see what the LAN port negotiated at with the switch ?
You may try to manually set your computer and/or the router LAN port to 100 full duplex to see if it fixes it.
-Tom
Please mark answered for helpful posts

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Best practice for unmanaged switch to cisco switch

In our environment, I have to allow some users to have a unmanaged switch which is connected to access port.
I put this configuration for each port which is connected to unmanaged switch (Netgear 8 port)
interface GigabitEthernet1/0/47
switchport port-security maximum 3
spanning-tree guard root
end
port-security maximum 3: only allow 3 mac
spanning-tree guard root: just in case to protect root bridge if someone put managed switch with lower bridge ID.
I connected one cable from unmanaged switch to another port to make a loop for test.
It showed that switch got "Loop-back detected" and put err-disable port automatically. So I don' t need to worry about this.
Apr 7 18:33:01.370: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet1/0/47.
Apr 7 18:33:01.370: %PM-4-ERR_DISABLE: loopback error detected on Gi1/0/47, putting Gi1/0/47 in err-disable state
Apr 7 18:33:02.373: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/47, changed state to down
Apr 7 18:33:03.379: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/47, changed state to down
LAB_HQ_Fiber(config-if)#
What are the option do you use usually to protect from unmanaged switch?
I am not able to use "spanning-tree bpduguard" because it will block a port
I can use "spanning-tree bpdufilter" to protect a STP area, but I don't think this is a big matter.

Hello
If you need to attached these kind of switches/hubs - Make sure you shutdown all unused ports on the managed switch so to limit any further unauthorized attachments looping back into the network from the unmanageable device, This way you can managed these unmanageable devices to a certain extent.
As for the stp root, you should manually set your stp priority on the managed switch to a low level anyway so as to not allow any other new device negotiate its self to become the root, and for the ports you are aware of that will have these devices attached, i would disable portfast and also advise against using bpdufilter as this negates the stp process.
Int range fa0/x -xxx
description unmanaged devices
no cdp enable
On all managed switches and on all ports you DONT expect to have unmanaged hubs/switches I would suggest to apply
spanning-tree loopguard default
udld enable
udld aggressive
int range fa0/x -xxx
description access ports
switchport port-security
switchport port-security aging type inactivity
switchport port-security violation restrict/shutdown
switchport port-security maximum 2
spanning-tree portfast
spanning-tree bpduguard enable
spanning-tree guard root
no cdp enable
One last thing I also wouldn't enable error recover either, as you would want to know the reason why your ports are erroring and not go chasing your tail as the reason why your having intermittent network issues.
res
Paul

Cisco sg 100d unmanaged switch not connecting to network

I have a Cisco sg 100d-08 unmanaged switched that had been working just fine for several months but now devices attached to the network thru are no longer on the network. All lights are on indicating the ports are active. Tried power recycle but no joy. When I replaced the switch with an old Belkin model everything works fine. Is there anyway to reset this unmanaged switch or do I now just have an expensive paper weight?

When the management interface is part of VLAN x
Make sure that the management interface vlan id is set to 0 (untagged ) If the native vlan on the switch trunk connected to controller is vlan x. If the native vlan is something else make sure to tag the mangement interface vlan with x.
Another interesting thing that might happen with switch having the following command enabled:
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In that case all trunk native vlan frames will be tagged , so you have to tag the management vlan on the controller as well in that case.
To be able to troubleshoot such connectivity problem, you should get the output of:
show run int
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I should tell you why the recommended action solved your issue based on the above explanation, and if you would like I can maitain the tag for you.
Please Don't Forget to rate correct Answers

SD205 (unmanaged) switch and VLANs

In addition to all my Cisco Catalyst (managed) switches, I have a bunch of Linksys SD205 unmanaged switches on my LAN.
I want to configure my network for VLANs, which means I will be changing all of my Cisco managed switches to a "trunking" configuration. This configuration is working correctly with the Cisco Catalyst switches
Question: can the SD205 function in this environment? I know I can't set any of the ports on the SD205 to be "trunking", but I would like to connect the SD205 to a Cisco port that is "trunked", so the devices on the SD205 can communicate to the rest of the world.
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Go to Solution.

No. An unmanaged switch does not support 802.1q. It will drop any ethernet frame that has been 802.1q tagged. The only frames which go through an unmanaged switch are untagged frames, i.e. the native VLAN of the port on the Catalyst.
If you want to use unmanaged switches you have to connect them to a port configured in access mode, member of a single VLAN. For example, you can configure a port on the Catalyst for access mode in VLAN 10 and connect an unmanaged switch to this port. Then all devices connected to the unmanaged switch will be VLAN 10. This is as much as you can do.
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[SOLVED]X11 video output only with ati open source drivers

Hi everyone,
my nvidia graphics card died recently and I replaced it with an ATI Radeon HD 4870, which in hindsight might have been a mistake.
I installed the catalyst driver at first, ran into some problems, finally decided to switch to the open source xf86-video-ati driver. Followed the ati wiki, but ended up with X11 video output only. Can't watch anything full screen, general performance is sluggish. The output of xvinfo is:
screen #0
no adaptors present
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Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection
Section "Module"
Load "dri2"
Load "dbe"
Load "record"
Load "glx"
Load "extmod"
Load "dri"
Load "drm"
EndSection
Section "Monitor"
#DisplaySize 470 300 # mm
Identifier "Monitor0"
VendorName "SAM"
ModelName "SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS"
EndSection
Section "Device"
### Available Driver options are:-
### Values: : integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "Dac6Bit" # [<bool>]
#Option "Dac8Bit" # [<bool>]
#Option "BusType" # [<str>]
#Option "CPPIOMode" # [<bool>]
#Option "CPusecTimeout" # 
Option "AGPMode" "8"
#Option "AGPFastWrite" # [<bool>]
#Option "AGPSize" # 
#Option "GARTSize" # 
#Option "RingSize" # 
#Option "BufferSize" # 
#Option "EnableDepthMoves" # [<bool>]
#Option "EnablePageFlip" # [<bool>]
#Option "NoBackBuffer" # [<bool>]
#Option "DMAForXv" # [<bool>]
#Option "FBTexPercent" # 
#Option "DepthBits" # 
#Option "PCIAPERSize" # 
#Option "AccelDFS" # [<bool>]
#Option "IgnoreEDID" # [<bool>]
#Option "DisplayPriority" # [<str>]
#Option "PanelSize" # [<str>]
#Option "ForceMinDotClock" # <freq>
Option "ColorTiling" "on"
#Option "VideoKey" # 
#Option "RageTheatreCrystal" # 
#Option "RageTheatreTunerPort" # 
#Option "RageTheatreCompositePort" # 
#Option "RageTheatreSVideoPort" # 
#Option "TunerType" # 
#Option "RageTheatreMicrocPath" # <str>
#Option "RageTheatreMicrocType" # <str>
#Option "ScalerWidth" # 
#Option "RenderAccel" # [<bool>]
#Option "SubPixelOrder" # [<str>]
#Option "ShowCache" # [<bool>]
#Option "DynamicClocks" # [<bool>]
#Option "VGAAccess" # [<bool>]
#Option "ReverseDDC" # [<bool>]
#Option "LVDSProbePLL" # [<bool>]
Option "AccelMethod" "EXA"
#Option "DRI" # [<bool>]
#Option "ConnectorTable" # <str>
#Option "DefaultConnectorTable" # [<bool>]
#Option "DefaultTMDSPLL" # [<bool>]
#Option "TVDACLoadDetect" # [<bool>]
#Option "ForceTVOut" # [<bool>]
#Option "TVStandard" # <str>
#Option "IgnoreLidStatus" # [<bool>]
#Option "DefaultTVDACAdj" # [<bool>]
#Option "Int10" # [<bool>]
#Option "EXAVSync" # [<bool>]
#Option "ATOMTVOut" # [<bool>]
#Option "R4xxATOM" # [<bool>]
Identifier "Card0"
Driver "radeon"
VendorName "ATI Technologies Inc"
BoardName "RV770 [Radeon HD 4870]"
BusID "PCI:1:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
Section "DRI"
Mode 0666
EndSection
Any ideas?
Last edited by Raisuli (2009-05-31 16:08:41)

I think I had XV with this stuff: xf86-video-radeonhd-git-r6xx-r7xx and drm-radeon-module-git-r6xx-r7xx

Unmanaged switch with CDP?

I am trying to find an unmanaged cisco switch that has cdp. Technically the switch doesn't have to be unmanaged, but I am looking for a cheep switch with only 5-10 ports that also has cdp. I can't be sure if the small cisco SD series switches, formerly s***sys, have cdp now or not.

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Toggle 'digital output only"--Is there a way to create a shortc

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Unmanaged Switches

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yes even nonmanagable switch also keep their MAC address table in order to perform the switching function...they are able to do all the normal switching function which we can able to do in our manageable switch...the only thing is you cannot configure it to make it work for your purpose...
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rate this post if it helps
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Dtt3500 and Audigy Gamer, digital output only 2 channel unless its D

Ok I recieved a response concerning my last comment but unfortunatly it did not answer my question at all. I have a DTT3500 and a sound blaster Audigy Gamer hooked up with the digital out to the /8 din adapter. I try the advanced 3d demo that came with the Audigy software and I only hear the front 2 channels, no center and no rears. The demo where you move the little icons and sound moves along with it. I have 5. activated in my windows control center along with audioHQ and digital out only is selected. my DTT3500 has 4./5. digital selected along with dolby digital/pcm audio and digital in. I am not getting the effect of multisurround at all. My center works and my rears work because playing music I can use all 5 speakers. When I use the analogue outputs I hear multisurround from the advanced 3d demo but my center doesnt work. The analogue setup sounds better but without a center channel its useless to me. Am I doing something wrong? I am using the adapter and digital DIN, what gives? The only reason I noticed I wasnt getting surround was while playing games nothing comes from behind you even on 5. games. The goldmine demo doesnt even work right, when the bird flys behind you it disappears but there is still sound from the rears. Analogue fixes this without a center but the manual and setup say to use the digital din. Do I just have a setting wrong? I would like to experiance the full capacity of multispeakers in my games.

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Unmanaged switch outputs only 10MBs

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