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Cisco router 1921 login and configuration

Posted on 2014-10-14
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Last Modified: 2014-10-15
Hello all. . . I got a little situation here.

I have an Cisco 1921 router and a new ISP. Im not super good at configuring it.
The new ISP is:
Gateway: 152.115.80.137
netmask: 255.255.255.248
IP: 152.115.80.138

I am using putty to get into my router. . . But when i use the command "Enable" and "cisco" nothing happens????
How can i get access to my Cisco router?


Do i need to type in the ISP information somewhere in the router? Or should i just plug them togehter?
Im a bit lost, i really hope someone can help me with this.  Everything you can tell me about making the internet work with the new ISP and Cisco 1921 would be VERY much appreciated.

But first of all. I just need access so i can run the "show on" command.
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Question by:Mike Kristensen
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Author Comment

by:Mike Kristensen
ID: 40379472
cisco1921>show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0         unassigned      YES NVRAM  up                    up  
GigabitEthernet0/0.523     80.161.191.18   YES NVRAM  up                    up  
GigabitEthernet0/1         unassigned      YES NVRAM  administratively down down
FastEthernet0/0/0          unassigned      YES unset  up                    up  
FastEthernet0/0/1          unassigned      YES unset  up                    down
FastEthernet0/0/2          unassigned      YES unset  up                    down
FastEthernet0/0/3          unassigned      YES unset  up                    up  
Vlan1                      unassigned      YES NVRAM  up                    down
Vlan2                      217.60.128.65   YES NVRAM  up                    up  
Vlan3                      unassigned      YES NVRAM  up                    down
Vlan4                      unassigned      YES NVRAM  up                    down

This is what i have now.
Can someone tell me where to put in the new ISP information? At Vlan2? Should Vlan2 have the new Default gateway = 152.115.80.137?

And what is GigabitEthernet0/0.523     80.161.191.18  ?    It seems its from there the internet gets in? Should i change this IP? And to what?
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Otto_N earned 2000 total points
ID: 40379609
I assume that if you type "enable", the router prompts you for a password, but "cisco" just returns you to the "cisco1921>" prompt? (If you're in enable mode, where you can do configs, the prompt will change to "cisco1921#").  If this is the case, you have the incorrect password.  Either contact the person that initially configured the router, or do a password recovery (full procedure available here.)

Just some comments on the "show interface" command: VLAN 2 is the LAN segment on your local router, while Gi0/0 seems to be the trunk interface connecting to your ISP.  It seems that this interface is running 802.1Q trunking, and uses VLAN 523 in this trunk to connect to the ISP.  (You can confirm this, once you have the enable password, by doing "show run int Gi0/0" and "show run int Gi0/0.523.")  I'm not sure if these settings are compatible with your new ISP.  Should you enable trunking on the interface, and what VLAN ID should you use?  The question is also if the subnet you're assigned must be configured on the Gi0/0 uplink, or on the local LAN segment of your router.  This information should be provided by your new ISP, hopefully in some "quick set-up guide" for new customers.
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