Cisco Switching/Routing :: Unable To Login To 2960 Via Console Through Terminal Server
Oct 23, 2012
I have a set-up with multiple C2960 and C3750 switches. All these devices are being managed remotely. So basically I login to C2901, which is used as a Terminal Server, and reverse SSH to the console of each device. That's - I have assigned an IP to each port of the terminal server so that I can SSH directly to the desired device through via the mapped IP.
Now, recently I had to restart couple of switches - one C2960 and C3750. I initiated the reboot via console connection remotely. I could see the device logs for some time and then the logs stopped and there was no reaction from the console irrespective of any command I tried to enter.
I tried resetting the line on the terminal server, but that didn't work.
Now when I try to SSH the IP mapped to console of that particular device - i dont get any login prompt and there is no effect on device after giving any command. Although i can see the logs on the console session - but cant do anything.
I have a second way of connecting the device via inband- management, and checked the device config found it correct. It is same as other devices which are working correctly.
Both C3750 and C2960 are behaving exactly same - can see logs on console but see effect of even pressing enter - not getting login prompt as well.
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Mar 12, 2012
I have a strange issue that I am having an issue figuring out. I am trying to login to the 1941 router through the console port. When I enter the username and password, which I just set, it fails. I am able to login under a different login but when I try to enter the enable mode the enable password doesn't work, which I just set as well. I can login with the TACACS+ login from a SSH session. Here is the line config:
line con 0
exec-timeout 15 0
logging synchronous
[Code].....
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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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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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Nov 11, 2012
is it possible, to use a Catalyst Switch (in my case a 3560E) as a source for a console session to another Catalyst? In principle to use it as a console terminal server.
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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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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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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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Dec 12, 2012
I planed to configure a new catalyst 2960 switch with console cable.
During the boot, all seems ok. but from my terminal client, I can't have access to configuration mode.Keyboard or Terminal client is not sending commands to the switch.
The terminal is blocked on this line Compiled Tue 28-Sep-10 13:44 by prod_rel_team.what can I do to get access to the switch? [code]
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Jan 6, 2012
we have a cisco 2960 48 port tcl switch port and i've enable ssh on my switch and now :
1) how can i login to ssh ? how should create username for ssh ?
2) how can i disable telnet ?
3) how can i change main (master) password?
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Apr 22, 2012
I have a switch(6500) with 2 vlans(2 SUBNETS) and from the other side of my network i have 2 terminal servers.
I want to have a VIP in my 6500 switch which i have the 2 vlans and when the first vlan(network) try to connect to the VIP
my switch will forward to first terminal.When the second vlan try to connect to VIP the switch will forward to second terminal.
I'd like the switch to decide in wich terminal server will forwared the packet based on source network.
I am not sure how i can do this???I use VIP with SLB???I use NAT???PBR?
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Feb 28, 2012
I have 100+ 3750's that are running various IOS, some stacked and some not, and all seem to have the same problem.If I attempt to paste a configuration into the terminal session I get booted after about 10 to 15 lines. This happens when using SSH and Telnet. Telnet will go a little further before I'm booted. After I'm booted it sometimes takes a minute before I can log back into the switch. Any issues pasting configs into a 3750 via a VTY session?
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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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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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Dec 30, 2012
I configured the below config in Routers it is working good , but when i do the same in SWITCH-2960 , i am getting a problem not able to login to enable mode ... i am getting the basic login only ....
Error msg : % Error in Authentication.
Need to be configured at TAFE Network Devices: Code...
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May 22, 2012
I'm trying to connect a Cisco 2811 using an octal cable to a Juniper MX480 console port.Since the distance between Cisco 2811 and router is 20ft, im using couplers and a straight-through cable for the lack of slack. This wiring doesnt work, however in another city it works going straight from the Cisco 2811 octal cable to the router since they are in the same rack.
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Jan 11, 2012
I not able to access cisco 2811 router (AC operated) through console port when I try to access it by selecting COM Port, but I able to access by selecting the TCP/IP option.
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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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Jun 11, 2013
We created some local account for this switch but we unable to login when the TACACS Server down.
3750 Switch
aaa group server tacacs+ ACS
server x.x.x.x
server x.x.x.x
ip vrf forwarding Mgmt
ip tacacs source-interface GigabitEthernet0
[code]....
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Nov 1, 2012
I am having 2960 switch and one port is configured with a VLAN and connected with an unmanageable switch and further one more unmanageable switch was connected to the primary unmanageable switch…
The topology will be 2960 switch -> unmanageable Switch -> unmanageable -> PC connected
The issue I am facing most of the PC are getting IP addresses through DHCP server and very few 5 or 6 PC’s out are not getting the IP from DHCP server.If I switch of the switch and switch on the issue is resolved for those and it will raise for some other PC’s.
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May 1, 2013
i have a device connected to 2960 switch. It is an access port and i could ping the device from other switches , also from outside the lan. But i am not able to ping the device from 2960 switch alone. I suspected and checked the arp table and it was showing as incomplete. I created the manual arp entry and tried pinging but no luck.
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Sep 11, 2011
just want to confirm if I could use the 2x 10GE uplink ports of a cisco 2960 to connect to my Server directly?
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Jul 26, 2012
I have Cisco 2960 switches deployed in my environment along with radius server authentication. Now i need to assign some roles to particular users (shutdown port, description) so what i need to do for this task so not all users have same privileges.
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Feb 28, 2012
We had core(4503), distribution(3750), and access switches(2960) in our environment. Currently we configured the clock manually in each switch, but a reboot of the switch resets the clock also. We are planning to make a single switch as a NTP servers and others are clients to synchronise the correct time even after a reboot of the access switches.
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Feb 10, 2013
I need to buy a cheap Cisco switch with DHCP server.Can you confirm that 2960-24-S, 2960-24TC-S and 2960-48TC-S be a DHCP server?
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May 19, 2013
I am unable to connect a Wifi Modem wiith 2960 Switch having VLAN 1,Attached is the network diagram,what configurations i have to modified it,I need to Connect A Wifi Modem on VLAN 1 ,Connectivity is working fine between VLAN 10 and VLAN 1.What should be the next step to Connect Wifi Modem to VLAN 1 so that Users on VLAN 10 should connect to Internet.
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Feb 11, 2012
With out using any server, will DHCP be configured in cisco 2950/2960 switch?I man cisco it self should work as a dhcp server also.
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Apr 29, 2013
I am trying to copy IOS from my TFTP server which is on my laptop to cisco 2960 switch
I am able to ping to switch from my laptop, connectivity is fine, tftp server is running
Current Image on Switch --> C2960-LANBASE-MZ.122-25.SEE3.bin --> trying to upgrade to --> c2960-lanbasek9-mz.122-53.SE2
I am getting below error when trying to upgarde IOS:
2960-SW#copy tftp: flash:
Address or name of remote host []? 10.1.x.x
Source filename []? c2960-lanbasek9-mz.122-53.SE2
[Code].....
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Jun 24, 2012
I need to configure a Cisco 2960 switch as a DHCP server. The current IP address will be on a different seed than the DHCP addresses. i.e.
Switch IP = 10.1.2.3, GW = 10.1.2.1, Subnet = 255.255.255.0
DHCP addresses would be 192.168.1.1 - 200, GW=???? (10.1.2.3?) and subnet would be 255.255.255.0
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Jan 28, 2013
I am going to creat VLANs very 1st time therefore for test purpose I have following simple scnerio.I have created 2 VLANs , VLAN2 and VLAN3 on Cisco Catalyst 2960 series switch. Ports 1-12 is assigned to VLAN2 and Ports 13-24 are assiged to VLAN3. Now I have configured DHCP on Microsoft Server 2003 defining 2 scopes with following configurations.
Scope 1 for VLAN 2--- Range is 172.16.0.17 to 172.16.0.30 with subnet mask=255.255.255.240 . Server IP address 172.16.0.17
( Note: Address 172.16.0.17 is excluded from dhcp server Scope 1 and give to the MS server itself)
Scope 2 for VLAN 3----Range is 172.16.0.33 to 172.16.0.46 with subnet mask=255.255.255.240 .
Now in Cisco 2960 series switches, under Vlan 2 and Vlan 3, I have following configurations...
interface Vlan2
ip address 172.16.0.30 255.255.255.240
ip helper-address 172.16.0.17
interface Vlan3
ip address 172.16.0.46 255.255.255.240
ip helper-address 172.16.0.17
Now the problem is when i connect a client computer to any port from 1-12, It gets correct IP address from Scope 1 but when I connect a computer to any port from 13-24, it does not get the ip address.
Further I want to do inter VLAN comunication as well for that purpose i Have an ISR 2900 series router. What further configuration i will have to do on router for inter vlan communication.
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Nov 15, 2012
Does the 2960 switches with LAN-Lite support DHCP Server Port-Based Address Allocation?
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Mar 12, 2013
I wanted to update the F/w on my rev b dir 825, but unable to load the login console for admin, I haven't changed anything and the router was still on 2.07NA f/w
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Nov 12, 2012
I have 2 routers, one is an Apple AirPort Extreme with a static outside IP address, I also have a Cisco 871 with a static outside IP address. The Airport Extreme connects to a switch on the private network and has an IP address ending in .1. The Cisco 871 connects to the same Private network and it ends in .2. The 871 is setup as a VPN Server. now when clients connect to the VPN they can ping the VLan IP Address on the 871, but they can t ping any other hosts on the smae network. The hosts on the private network can ping the vlan on the 871.
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