Cisco Switches :: SG300-20 - Password Lost After Firmware Update V1.2.7.76

Aug 31, 2012

I have a problem. Yesterday I have upgraded both my SG300-20 switches to firmware v1.2.7.76. Now I cannot login on of my switches, unknown username and password. I am absolutly sure I have the password, because they are the same and I just upgraded it. I have re-booted the switch, but without any luck.

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Cisco Switches :: SG300-20 Update To Lost OID

Feb 4, 2013

I use this oid to gather mac address: .
This has worked on all of our cisco switches (3560,SG300, etc...). When an SG300-20 was updated to the oid no longer exist.
snmpwalk -c public -v 2c switch .
iso. = No Such Instance currently exists at this OID
Should I downgrade the switch back to

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Linksys Wireless Router :: Wrt160n Lost Wifi Connectivity After Firmware Update

Dec 2, 2011

I updated the fimware on my WRT160N v3 and followed it up with a reset of the router.  I then restored the router settings that I had saved.  All the settings appeared to be good, but none of my wireless devices would connect.  I reneted the pass phrases (WPA2) but still nothing.  Tried to change the passphrase, still no good.  I then did a factory reset of the router from the setiings page and manually re-entered and save the settings, again nothing.  All of my devices are able to "see" the network and the correct SSID. 

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Cisco Switches :: VLAN Membership Lost After Reboot SG300-20

Aug 31, 2012

I have two Cisco SG300-20 switches. Both of them are configured in L3 mode. They have several VLAN's configured.
When I reboot my switches some VLAN membership settings are lost! I have already saved the settings over and over before rebooting, and even tried to save it to the backup memory and so on. Say for example I have changed port 9 to 14 from VLAN 101 to VLAN 105. I save the configuration, reboot the switch. And then the changes are lost. This is a big problem, because servers and my iSCSI network loose connectivity. They already have the latest firmware. This issue was there three firmwares before.
This issue pop-ups when I have a power loss, or I need to reboot/shutdown them manually. It may be off-topic but I also have the feeling that the performance of the switches goes down during uptime. A reboot solves the performance issue. I don't have a performance benchmark, but I can notice it on the performance transfer rate between clients and servers.

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Cisco Switches :: SG300 On 1.1 Firmware Has Double-Login On SSH

Jan 4, 2012

We just upgraded our Sg300 series switches to the new IOS so we can get CLI access. The upgrade went fine but it seems we have two login prompts, the first being completely unnecessary as you can just hit return to get by it. IE here is the progression: 
1. Connect SSH

2. Receive a "login:" prompt. Anything can be entered here, including just return

3. Login banner is displayed

4. Username Prompt is then displayed. Valid username required

5. Password Prompt displayed - Valid password required

6. Now at CLI 1. Connect SSH

I am trying to get rid of that first login prompt (IE Step 2) as it is causing issues with our configuration software. I have tried every line and authentication command I can think of, the only thing that gets rid of it is using none authentication which obviously we can't stay with. how did you get around it?

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Cisco Switches :: SG300-28P DHCP Server With New Firmware?

Jun 15, 2012

we are looking to use the new firmware's DHCP server feature to setup different DHCP scopes for 5 different VLANs configured on the switch. I see where to turn this on and setup the scope however I can't clearly see where I can assign the specified scope to each VLAN on the switch.

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Cisco Switches :: SG300-28 RADIUS Accounting Firmware And

Jan 27, 2012

I am using the CISCO SG300-28 with firmware version I enabled RADIUS authentication and accounting. Authentication is working but there are no accounting requests/replys (Accounting on, accounting off, accoun ting start, accounting stop) when running RADIUS in debug mode. I also did a packetcapture and there are no accounting packets.
So i updated the firmware image up to version When I now want to configure accounting in RADIUS settings then there isn't any option to set an accounting port.
Ich checked the data sheet of the switch and it says that accounting is supported:
802.1X: RADIUS authentication and accounting, MD5  hash; guest VLAN; unauthenticated VLAN, single/multiple host mode and  single/multiple sessions [URL]
I did a second packet capture with the new firmware image and there are still no accounting packets.
The RADIUS server is configured correct for accounting because when using another NAS like a WLAN-AP with DD-WRT accounting is workings. It is working with pfsense Captive Portal (an open source firewall and routing solution with a hotspot portal).

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Cisco Switches :: SG300-28P DHCP Server With New Firmware

Apr 9, 2013

we are looking to use the new firmware's DHCP server feature to setup different DHCP scopes for 5 different VLANs configued on the switch.  I see where to turn this on and setup the scope however I can't clearly see where I can assign the specified scope to each VLAN on the switch. 

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Cisco Switches :: SG300 Firmware Upgrade - How To Reload Using CLI

Jul 27, 2011

I've been having a problem with a brand new SG300-10 switch that I posted about yesterday. I checked the firmware and it was at and the lastest is So I backed up the current firmware and loaded the version and it seem to be CLI based only, with no web GUI.
If so is there an easy way to reload the using the CLI? There is nothing in the CLI docs that I can see unless it's buried.
The release notes for don't say it's CLI only either, maybe something just went wrong but the CLI seems to be functional.

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Cisco Switches :: SG300-28 In Boot Loop After Firmware Upgrade

Jun 22, 2012

After performing a firmware upgrade on an SG300-20 switch from ver  to the switch now boots up with the following error and resets:
30-Aug-2011 10:47:33 %L1Mngr-F-PARAMTOOLONG: csco-sb parameter %s is too long.
The attached file contains a full output of the console boot process. I have tried loading different versions from the console, but all produce the same error.

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Cisco Switches :: SG300 / Switching Firmware (Active Image)

Apr 16, 2013

I have a question regarding SG300 series small business switches.If I switch between the two possible images, will the configuration get lost or is the configuration the same independent of which image I choose?

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Cisco Switches :: Convert SRW2048 Software To SG300 Firmware?

Aug 14, 2011

I believe the SRW series is the same basic hardware as the SG300 series.Is there a way to upgrade the firmware on the SRW series using the SG300 firmware?
The SG300 firmware is much more usable. Also I'd rather have consistency as we have the older SRW2024/48 and the newer SG300 switches.

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Cisco Switches :: SG300-28Ps - Firmware / PoE Indicators No Longer Lit?

Mar 28, 2013

I installed the on a couple of SG300-28Ps.  On the Status and Statistics page, the PoE indicators no longer lit. Physically, on the front of the switch, they did still light.  I didn't yet reboot to factory defaults to see if that clears it, because I don't feel like entering the config again this early in the morning. But I am willing to test that, if needbe.
When reverting the image back to (tested) or possibly earlier, the ip default gateway must be re-entered (if it was configured). Even if ip-default gateway x.x.x.x shows up correctly on a 'show run', the switch will not obey it, and on the IPv4 settings page it will report the operational default gateway as blank. This came as a surprise becauset he switch suddenly wouldn't talk to the VPN anymore.

Logging onto the switch locally, going to the IPv4 settings, ticking the radio button back on User Defined and typing it back in cleared that up. It appears this cropped up because the syntax for specifying the default gateway changed in 1.3.x but it's still odd that the config shows correctly in console but not in the gui.

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Cisco Switches :: Firmware Update SRW2016?

May 6, 2013

I have tried to update the firmware of my srw2016 but after this update my switch wouldn't start again.

It shows this message in my console:
Exit from boot menu. Continue with flow.
Preparing to decompress...
Image in address: 0x0 - Check Sum error!
Please download a new image. 
Downloading code using XMODEM.

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Cisco Switches :: SG300-10 / SF302-08P - Missing Mirror Configuration On Firmware

Jan 21, 2012

I have several SG300-10 and SF302-08P switches running with L2-mode, and after I upgraded their firmware to, they began to record the following logs every one hour.

- Severity: Warning

- Description: %COPY-W-TRAP: The mirror-config file is illegal due to failure of previous copy operation/s to mirror-config.Also I found that I didn't see the Mirror Configuration file on the Configuration File Table in the Configuration Files Properties page. 

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Cisco Switches :: Slm2024 Firmware Update Failing?

May 5, 2011

I just purchased and installed this switch.  It has firmware version with boot version  I want to update te firmware to  Perhaps I am not doing something correct because when I try to update it I receive an error message that tells me the file is an illegal software format.  Here is what I did.  Under file format went to update firmware select http, update the chose the 2008.ros file.  Start the upgrade but it fails.

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Cisco Switches :: SG300-28 Don't Have Password To Login Device

Feb 19, 2013

i have a SG300-28 switch here but I do not have the password to login the device. From the startup config of the switch, I see the login password is encrypted. Are there anyway for me to access the device without reset it?

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Linksys Wireless Router :: 4200 - Firmware Update / Disable Password For Guest Account

Dec 7, 2012

I would like for Cisco to offer a firmware update for my 4200 so that the password for the guest account can be disabled.

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Cisco Switches :: Firmware Update Failed / Can't Access SRW2024

May 10, 2011

Have an SRW2024 that I was updating firmware and it got interrupted. Now I can't access the switch from either console or IP. Switch will not pass traffic. Is there a way to get this switch completely reset so I reconfigure and use it again?

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Cisco Switches :: Disable Password Expiration Requirement On SG300?

May 13, 2012

I have a dozen or so SG300 switches and a few months after configuring and deploying them, I have noticed that as I'm logging back into them, I'm being told that I'm required to change my password as it has expired.  The problem I have with this is that we pick a super complex password and stick with it because we have bots that telnet to the switches and pull configs and make config changes.  I do NOT wish to have this enforcement turned on for these switches and I think it should be an option but neither the Admin Guide, the command line, nor the GUI seem to have any mention of this "feature".  how to disable this feature?

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Cisco Switches :: SG300 Public Key Accepted But Still Prompted For Username Password

Feb 5, 2013

Trying to ssh from our QNAP to our switches and copy the running-config.These tests are on an SG-300. When ready well be doing the same thing on all of our 2960's. So maybe the SG300 is the problem.

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Routers / Switches :: Lost Password / How To Recover It

Jun 21, 2012

I lost my router password and how to recover?

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Routers / Switches :: Lost Network Password Key

Jul 17, 2011

I have tried to reset linksys router and tried to use the IP address with an error message. We need to add another laptop to our network

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Routers / Switches :: Lost Password Can't Connect Nook To Network

May 15, 2012

lost my password-can't connect my new nook to my network.

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Cisco Switches :: SG300-28 GUI Different Than Online SG300-48 Simulator

Aug 29, 2011

These are our first switches and seems like GUI is lot different than the online. Out intervlan routing is o not working. I am absolutely sure that I setup the switch in L3 mode since it allows me to create mutiple interfaces. I am hoping that this GUI issue is related to interVLAN routing.
Below is the blog I started for InterVlan issue [URL]
This is the link for online simulator and what I see in its IP tab. I know this switch is not SG300. [URL]
This is what I see on our switch.
Our switch version
switchd64684#show version                                                                                                                                              
SW version ( date  19-Jun-2011 time  18:10:49 )
Boot version ( date  08-Apr-2010 time  16:37:57 )
HW version    V01

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Cisco Switches :: SG300-28P And SG300-52 Web Managing - Fans

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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Cisco Switches :: SG300-28 Uplink To Another SG300-28?

Feb 8, 2012

Can I connect a single Cat5e cable between two SG300-28 and link them?  If so what must I configure?

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Cisco Switches :: Difference Between SG300-28P And SG300-52

Jul 25, 2012

I have SG300-28P that I am using as layer-3 switch. Recently I ran in to SG300-52 switch and even though loading same firmware doesn't give me option to do layer-3 switching. For SG-300 I see options in GUI to create vlan interfaces under IP information section, while SG300-52 has IP information option only under the management section.let me know if these are 2 different hardware types and L3 is not possible on SG300-52. If its possible to enable L3 switching on SG300-52?

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Cisco Security :: ASA-5512 Lost 3DES After Update

Jul 4, 2012

I recently applied a new activation key to an ASA5512 to add the 250 anyconnect essentials user.  However, after reboot, I lost the 3DES/AES license which now reads disabled.
how to re-install the 3DES key?
I cannot find the old "Get a FREE 3DES" activation link - it says http:403 error.

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Cisco Switches :: Replacing 3COM 4500 Switches With SG300-52?

Nov 21, 2011

I'm replacing 2 3COM 4500 Swithes with the SG300-52 Cisco switch. We have 3 VLANs, 10, 20, 100. The switch is set for Layer 3 and I have setup DHCP relay. what settings i should set on the Cisco for the following setups:
3COM Setup
interface GigabitEthernet1/0/1


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Cisco Switches :: SG300 Switches Have Poor Performance In Layer 3?

Jan 1, 2013

We have several of the SG300 Serices switches. We use them to route VLAN traffic to Remote Offices, Internet Connections, and WiFi Access Points.In one remote office we have a SG300-10 setup to route the HQ Network and the remote Office Subnet. The SG300 is Connected to HQ via Fiber and has multiple Tagged VLANs on it. If I do speed tests over the Fiber Link on the Incoming Tagged Netwotk I get Decent performance, 80Mbs. If I switch to a networtk that is not priginating from HQ, and have the SG300-10 route packet, I get dismal performance. 15-20Mbs.
I Fireded up a New SG300-28P FW v1.2.7.76. Added a the HQ VLAN 101 and new VLAN 1025 . Mapped some Tagged and untagged ports for each.  Switch was connected to HQ Network as untagged VLAN 101.  I put a laptop on an Untagged VLAN 101 port. Ran some tests, cam back with 750-850Mbs. Great.  Put the same laptop on a Tagged 101 Port, Configured the NIC for Tagged VLAN 101, Same test, same Speeds, 750-850Mbs.I then  Configured laptop for Tagged VLAN 1025. Connected to tagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!
I then  Configured laptop for Untagged VLAN 1025. Connected to unagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!It was only the Laptop and the Connection to the HQ net on the SG300-28P. Why is the performance of this unit soooooo poor when it needs to route?Other Switches have FW v1.0.0.27 or FW v1.1.2.0. They have Similar speed issues. All Configured for Layer 3.

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Cisco Switches :: SG300 Switches Can Be Used With Microsoft NLB In Multicast Mode

Dec 18, 2011

does the SG300 switches can be used with Microsoft NLB in Multicast mode?I know on traditional Catalyst switches you can statically "map" IP's to mac's and then to multiple ports but this doesn't seem to work correctly on the SG switches - it gives an error about the mac not being not Unicast?

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Cisco Switches :: VLAN Management Via SNMP On SG300-10 Switches

Aug 7, 2011

Any snmpset commands to add, modify and delete vlan table entries on SG300-10 switches? I checked url... however this information is apparently only valid for catalysts. The latest firmware is installed and the provided MIB files are used.

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