Cisco Switching/Routing :: CGS2520 Console Connection Triggers False Alarms?
Aug 13, 2012
Everytime the console port is plugged in, the alarm contacts (1-4) randomly assert (trigger) and then clear themselves in random orders. Nothing is plugged into the ALARM port and all Alarm setting are default. Below is the syslog message and Alarm Settings:
CGS2520-C#show env allSYSTEM TEMPERATURE is OKSystem Temperature Value: 45 Degree CelsiusPOWER SUPPLY 1A TEMPERATURE is OKPOWER SUPPLY 1B TEMPERATURE is DisabledPOWER SUPPLY 1A Temperature Value: 49 Degree
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Jan 5, 2013
Facing false alarm issues with ANM 5.2.1. Basically ANM is sending device down (ACE-30 module) messages occasionally, but in real the device has never went down.
Message:
ANM Server Host Name : anm-1
ANM Server IP Address : 10.9.20.1
Device ID : AGG-B:3
Component Name : AGG-B:3
Severity : info
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Dec 20, 2011
I've beating my head against the the above said problem for a quite a while. Our client has a very strict security policy and they require all standard protocol to comply with the expected behaviour. It was discovered that their 3750 switch running c3750-ipservicesk9-mz.122-25.SEE3 software and configured to sync its time with an external public NTP server triggers IPS signature - DNS Info leak. The problem is that the switch initiates the packet on UDP port 53 and not as I would expect on port 123 for NTP. Of course I can tune the IPS sensor and make it not to fire this signature but the client needs to know why it is happening and if it is faulty IOS software that doesn't comply to the rules.
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Feb 28, 2013
I have 2 3560 switches that are running 12.2(25)SEE2. Port security is enabled on some of the ports. Whenever there is a power failure, when power is restored, 1 port on each switch goes to err-disabled. The mac address that causes this is a valid address for that port. Below is the configuration on one of the ports.
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Jun 11, 2013
I have two 3560s that i would like to upgrade. But first i would like to make -absolutely- sure i dont wind up in a situation where i have to roll back over a console connection.to the day i still cant understand why oh why someone removed (or chose not to implement it everywhere) tftpdnld from rommon ;)
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Dec 18, 2011
I have a few new ASR 1001s throwing false environmental alerts.According to the logs, the inlet temp is in excess of 100 degrees C.When I telnet to the routers, they're well within tolerance (30-32C),Running 15.1(1)S and bug toolkit shows no related issues or caveats.
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Apr 10, 2013
We are using CISCO LMS 4.2.3 in our network in India, we are facing a issue regarding alarm generation for a protocol flap/down, especially when BGP / OSPF neighbourship got flapped.These flapping will result in the data service degradation , by which we came to know that some protocol flap may occurred at router end & then we go for the manual check by login into the router.after escalating the same to cisco we came to know that it is a bug of Cisco LMS. using any other method/technique to view the protocol down alarms automatically for cisco routers.
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May 10, 2012
I have 2691 router with following config
line console 0
login local
password xty
When i remove the login local from the line console i connect to console port and press enter it shows router prompt 2691Router> but i am unable to go to enable mode.If i telnet to router then i put username and pw then it goes straight to enable mode.
vty config is
line vty 0 4
exec-timeout 600 0
logging synchronous
login local
length 500
transport input telnet ssh
escape-character 3
Any reasons why i can not go to enable mode by console?
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Feb 16, 2012
So I have read about proper procedure involving the connection between a console cable and Hyper-terminal. I have also tried plugging into a network port to obtain an IP Address but nothing seems to work. When powering on the switch I see that it lights up, hear fans spin and assume it has booted properly. I'm using Hyperterminal on Windows Xp Pro SP3 and I've also tried minicom in Fedora.
And just FYI Hyperterminal was set to the proper:
Bits per second: 38400
Data bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
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Oct 26, 2011
1. How to check the history alarms in Router 7609?
2. How to check whether an Interface was down?
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Aug 9, 2012
I have a 6513 with redundant sup 720-3B's that I cannot get onto. In short, one of the power supplies failed, it still passes traffic but I can't console or ssh to the box. Other than the two sup 720's, I have a 4 port 10gig card, a 16 port GBIC Card and an IDS module. I have tried removing the 10Gig, IDS and one of the sup's but still don't get anything on the console. I have rebooted the entire chassis and don't get anything on my console while booting. I have tried changing the speed of my terminal to every setting available incase someone has changed it at some stage but to no avail. I have tried swapping sup's, using only one at a time in the chassis but not getting anything. Is there anything else I can try to get onto this chassis? The power supply is a 3000w with a 32amp input. The failed power supply had tripped a switch, when i brought it back up, the power supply came out but the output failed LED is on. My #questions are, is there anything else I can do to try get onto the console, and is the power supply goosed when the RED LED is lit? I have reseated the power supply also but the same result.
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May 30, 2012
I purchased an old cisco 831 for practical studies for a cisco certification. I purchased the console cable (serial/rj45) and a usb->serial converter cable. However when I open my terminal application (tera term) After I select the right com port (3) and make sure the connection settings are right. It will just sit idle and not show any data from the device. Was I sold a faulty device? It lights up and has three lights on.
Everytime I look at a manual or cisco video I am given the impression the terminal application will just automatically connect. But whenever I try I get nothing.
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Jan 4, 2012
i have 2811 router and i am coneccted via concole so i want to copy the 2811 ios to my PC is that possible?
how or give my the right decument to do this.
* idon't want to use TFTP becuse i have no ethernet connection to the router(only concole)
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May 19, 2013
I have installed a cisco 2911 router and the cisco usb console drivers on my pc, win 7 64 bit.however when I use putty and open the com port assigned it just goes blank, I am using the usb port on my laptop to connect and using the cisco usb console cable provided
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Apr 3, 2012
I have a 3560-24ps, and I'm having issues with it booting. When I power the device up all the front panel lights come on like normail, and then the system light starts flashing like normal, but after 5 - 6 seconds the system light goes off. I don't get any output from the console, and the fans still run.
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Jun 12, 2013
I cannot connect to the Cisco 2801 with console cable. what to do ?
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Dec 16, 2012
Is there a way to turn off 802.1x authentication messages to the console of a 3750 switch? The issue we have is that we like to monitor the terminal when remotely configuring our switches. However, every time a computer authenticates to the network we get messages and sometimes quite a few depending on the situation.
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May 3, 2013
I attached the terminal to the console port to watch the bootup sequense, but nothing appear the same cable used on athor switches and router without any issue.procedure to access the router noting that Giga ports not working also.
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Nov 13, 2011
I have a client whom has asked me to enable web management on some of his 2960 switches. I did not think this was going to be an issue, and so I told the customer I would set this up for him.
Much to my dismay, I have been able to get http and https enabled, and then authenticating locally for the HTTP access. I then come to the screen once authenticated which is shown below:
The issue is that when I select "Web Console", it gives me a "Web Page Cannot be found".
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Sep 27, 2012
I have 2 3750-x members in a stack running 12.2(58)SE2. I am able to console into the stack master, which happens to be the top switch, but not able to console into the 2nd member. I get the screen stating the console is available but never get the prompt to login. Is this expected behavior?On our stacks of 3750v2's, I'm able to console to any switch in the stack?
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Mar 18, 2013
I can't connect to the console of switch cisco sge2010, I tried several console cables and none worked for me, I followed step by step manuals and nothing.
Also try the web 192.168.1.254 according to the manual but when I connect from the laptop to do ping to the switch doesnt work.
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Feb 29, 2012
today I received a Cisco 1841 Router with a problem i have never seen before. Maybe this my 1st really,really broken Cisco Router. When I power the Router on, the fan and all lights turn on (green) and that's it. Nothing changes, also after minutes of wating. On console i don't get any messages and I already tried every BAUD rate possible. Switched the router off/on again and again. And no, it's obviously not a console problem of my computer, because i tried with different routers.
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Sep 10, 2012
I have stack of 2960 S switches.I can console only from Master not from memember switches is this default behaviour?
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Nov 3, 2011
My requirement is that I want to set same console password in 12 switch instantly...
All the 12 switch are connected to a cisco 6500 L3 switch..
So how can i do that.. i have cisco acs 4.1...
can i do that by cisco acs 4.1 if not tell me an software or command ...
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Dec 27, 2012
I have 2960 switch and i can't access it using my console cable .I can access other switches in my network ( 3560 & 2960 ) but i can't access only this switch.may be the console port in the switch damaged? or it's a bug ?? !!! although the switch is worked normally.
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Feb 7, 2013
I am not getting interface up/down logs in my switch console through show logging command. Switch model cisco WS-C4506-E and IOS :- cat4500e-ipbasek9-mz.122-53.SG3.bin. I have done below mention configurations, we can't configure logging level beyond informational. [code]
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Jun 30, 2012
I just purchased a used Catalyst 2900 XL switch and have not been succesful in connecting to the console via minicom 2.5 running on Ubuntu 12.04 or 11.10, I don’t even get junk charecters in the terminal or echo on input. The switch passes POST according to the LEDs on the front and the network ports are fucntional for switching purpouses.
I’m using a Prolific PL2303 USB-Serial adapter, which works with minicom to console into another device. I’ve tried every baud rate available and tried combonations of hardware flow control, software flow control, and niether.I’ve tested the pinout of the console cable and all pins map correctly according to Cisco spec.I’ve also tried Cutecom, putty, and screen. I have not tried HyperTerminal because I do not use windows.Is it possible that the previous owner disabled console access? Do I need to reboot the switch each time I test a different baud rate?
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Oct 23, 2012
I have a 3750X stack of 6 switches, I have a terminal server console server plugged into the console ports of all 6 switches. I am having a strange issue where I can connect to the master via the console, get a login prompt then I can log in, but when I try and connect to any of the members then I get a prompt "Press RETURN to get started" When I push return, it just loops back to the same prompt again:
switch-6 con0 is now available
Press RETURN to get started.
switch-6 con0 is now available
Press RETURN to get started.
I can connect to the stack via SSH fine etc. I am running 15.0(1)SE2. The stack is configured for TACACS+ auth via Cisco ACS.
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master f0f7.55ba.2700 15 1 Ready
2 Member f0f7.5541.da00 14 1 Ready
3 Member a493.4c1e.4b80 13 1 Ready
4 Member f0f7.5585.cb80 12 1 Ready
5 Member a44c.1120.8e80 11 1 Ready
6 Member a493.4cc0.fa80 10 1 Ready
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Feb 13, 2013
I have issue with Cisco Router 2801's Console Port. My student was doing a lab and he said during configuration, Console Port stopped responding. He was in middle of configuration, so now at present, only telnet is able to login on "R2>" user mode, enable password is not set, so getting "R2>en % No password set R2>" I have tried different terminal software but no output from Console Port, changed the Console Cables, replace with working console cables, change speed (baud) settings. Also tried to connect same console with "AUX" port and got same error mentioned above. AUX Port responds but I am not able to change mode (R2#) because of incomplete running-config. it seems "Console Port" is physically damaged.
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Dec 11, 2011
I have 2 Catalyst 2924 switch in a home lab. Both of them have developed the same problem at the same time (strange). I have tried all that I can think of. I can telnet to them but cannot access via the console port. On a telnet session I execueted a "write erase, reload" on one of them. As I anticipated this threw me out of the telnet session and I presently have no access to that switch.
The console cable is fine, works for all other devices.
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Feb 20, 2013
I want to configure my switch via console cable, the switch boots up normally, and there are no configurations present on the switch. However, anything I type does not appear on the terminal client. I used several terminal clients (TeraTerm, PuTTY, HyperTerminal), all latest versions as well as different PCs. I even forced the switch to rommon mode, still, anything I type does not appear on the terminal client.
Here's the output of TeraTerm:
Boot Sector Filesystem (bs) installed, fsid: 2
Base ethernet MAC Address: e8:40:40:06:f0:80
Xmodem file system is available.
The password-recovery mechanism is enabled.
Initializing Flash...
[code]....
After the last line, I can not type any command at all. I encountered this on three 2960 switches that we have here in our laboratory.
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Jan 25, 2012
I use a C2950-24 switch, with IOS 12.1(22)EA12 release.When I try to connect in console mode, I can see the "Press RETURN to get started!" message, but it's not possible to me to have the # prompt.An "authorization failed" message is displayed. And the same message is prompted.
I try to recover password by following the recovery procedure. After the boot command, I never see the message "Continue with the configuration dialog? [yes/no]: ".
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May 12, 2012
I've been assinged a task to connect our branch office with the head office, so that the IP Phones in the branch office can be connected to Cisco Call Manager at head office. To accomplish this they have given a Cisco 877 Adsl router a 10 Port 3-COM POE Switch and 3 Cisco 7911 IP Phones. Currently the there are 7 PC's Connected to 3 COM Switch which indeed is connected to a Internet router(Speedtouch). First I thought of connectiong the IP Phones to the Ethernet Port on Cisco 877 router but had to change my mind as the ports are non POE ports and I do not have adapters for IP phones. So I've decided to connect the Phones to 3 COM Switch and create VLAN's (DATA & VOICE) and pass the DATA traffic through Speed Touch and Voice traffic through the Cisco 877 router, but when I tried accessing the 3-COM Switch via Console I am getting Junk language( See the attachment for reference).
how can I pass through this Junk messeges and access the switch
[Code].....
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