CIsco 2921 router

[johnnyleano69]

Hi, I'm trying to set up some labs on my router and switch. I have been watching several videos on how to configure the ports on the router. I get to setting up DHCP and then when i do a "do ping 8.8.8.8" i get 0/5 succession rate. 

I ran debug mode but i also see that it says un-route able so i must be missing something. Please help 

[HawkJ]

Hi, 

 

Are there any routes when you type show ip route? 

 

What is your setup like? May I also know the DHCP command you used? 

[johnnyleano69]

Well let me be honest i am kind of new to the whole cisco world. 

So i cleared the cleared the configurations that were on it 

I think connected the ethernet cable from my modem to Interface g0/0

I then did 

router> enable

entered my password

router# config t

router#(config) int g0/0 

router#(config if)no shutdown 

router#(config if)ip address dhcp

router#(config if) exit

router#(config ) do ping 8.8.8.8 

thats when i got the error message 

 

[johnnyleano69]

i will get a screenshot to better show my issues

 

[HawkJ]

57 minutes ago, johnnyleano69 said:

i will get a screenshot to better show my issues

 

No problem. Everything looks right. Will you be able to post the results of the below commands? 
 

router> enable 

Type password

router# show ip interface brief

router# show ip route

 

First command will show if you got an IP on G0/0 interface. Second will show the routing table. 

[johnnyleano69]

thank u i will do that now 

 

[johnnyleano69]

 

 

 

So after a few more tries i finally got back around to the do ping .8.8.8.8 and it was successful with the connection 

but i reached another impass once i was trying to configure dhcp 

These screen shots were also taken with the ISP connection running through it because i needed to hop back on my computer to find more help 

 

[HawkJ]

14 minutes ago, johnnyleano69 said:

 

 

 

So after a few more tries i finally got back around to the do ping .8.8.8.8 and it was successful with the connection 

but i reached another impass once i was trying to configure dhcp 

These screen shots were also taken with the ISP connection running through it because i needed to hop back on my computer to find more help 

 

Interesting. 
 

So I see that G0/0 is configured as DHCP client but hasn’t received an IP from the upstream modem. 
 

And for the DHCP server pool, have you configured default router and DNS? 
 

After enable and pool selection, use commands

 

ip dhcp pool Base

default-router 192.168.2.1

dns-server 8.8.8.8

 

Default router sets the default router for DHCP clients. 
 

You can remove unwanted pools using “no ip dhcp pool base” command. 

[johnnyleano69]

im gonna keep worklng at it since i just woke up 

 

[HawkJ]

2 hours ago, johnnyleano69 said:

im gonna keep worklng at it since i just woke up 

 

Sure, let me know if you have any update. 

[johnnyleano69]

geez i think i am two steps back now. So i started it up and then i realized that it didn't save. 

So i reconfiged the g0/0 interface 

so i did 

router> enable

Router#config t
Router(config)#int g0/0
Router(config-if)#no shutdown
Router(config-if)#ip address dhcp
Router(config-if)#do ping 8.8.8.8
% Unrecognized host or address, or protocol not running.

Router(config-if)#exit
Router(config)#do ping 8.8.8.8
% Unrecognized host or address, or protocol not running.
 

router

[HawkJ]

4 hours ago, johnnyleano69 said:

geez i think i am two steps back now. So i started it up and then i realized that it didn't save. 

So i reconfiged the g0/0 interface 

so i did 

router> enable

Router#config t
Router(config)#int g0/0
Router(config-if)#no shutdown
Router(config-if)#ip address dhcp
Router(config-if)#do ping 8.8.8.8
% Unrecognized host or address, or protocol not running.

Router(config-if)#exit
Router(config)#do ping 8.8.8.8
% Unrecognized host or address, or protocol not running.
 

router

Oops. That isn’t good. Do remember to use command “copy run start” if you are planning to restart the system. 
 

In regards to the error, It is usually displayed when default gateway isn’t assigned yet. 
 

In terms of the DHCP client, I would suggest if you could set a static IP rather than using DHCP. Would make it easier for us. Would that be possible? 
 

int g0/0

ip address 192.168.1.2 255.255.255.0 (<- IP assigned from modem)

no shutdown

exit

Can you try after that?

[johnnyleano69]

50 minutes ago, HawkJ said:

Oops. That isn’t good. Do remember to use command “copy run start” if you are planning to restart the system. 
 

In regards to the error, It is usually displayed when default gateway isn’t assigned yet. 
 

In terms of the DHCP client, I would suggest if you could set a static IP rather than using DHCP. Would make it easier for us. Would that be possible? 
 

int g0/0

ip address 192.168.1.2 255.255.255.0 (<- IP assigned from modem)

no shutdown

exit

Can you try after that?

Router>enable
Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int g0/0
Router(config-if)#no shutdown
Router(config-if)#i
*Jul 17 07:13:04.603: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to dow
Router(config-if)#
*Jul 17 07:13:09.187: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Jul 17 07:13:10.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
Router(config-if)#ip address 192.168.2.1 255.255.255.0
Router(config-if)#exit
Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router(config)#
 

 

 

 

This is where i am at now 

 

[johnnyleano69]

17 minutes ago, johnnyleano69 said:

Router>enable
Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int g0/0
Router(config-if)#no shutdown
Router(config-if)#i
*Jul 17 07:13:04.603: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to dow
Router(config-if)#
*Jul 17 07:13:09.187: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Jul 17 07:13:10.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
Router(config-if)#ip address 192.168.2.1 255.255.255.0
Router(config-if)#exit
Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router(config)#
 

 

 

 

This is where i am at now 

 

Router(config)#Success rate is 0 percent (0/5)
                 ^
% Invalid input detected at '^' marker.

Router(config)#Router(config)#
                     ^
% Invalid input detected at '^' marker.

Router(config)#
*Jul 17 07:18:00.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state                                             to down
*Jul 17 07:18:01.187: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to down
Router(config)#
Router(config)#
Router(config)#
Router(config)#exit
Router#
*Jul 17 07:30:15.983: %SYS-5-CONFIG_I: Configured from console by console
Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int g0/0
Router(config-if)#no shutdown
Router(config-if)#ip address dhcp
Router(config-if)#exit
Router(config)#exit
Router#
*Jul 17 07:31:16.251: %SYS-5-CONFIG_I: Configured from console by console
Router#do ping 8.8.8.8
          ^
% Invalid input detected at '^' marker.

Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router(config)#
*Jul 17 07:32:07.187: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Jul 17 07:32:08.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state                                             to up
Router(config)#do
*Jul 17 07:32:18.251: %DHCP-6-ADDRESS_ASSIGN: Interface GigabitEthernet0/0 assigned DHCP address 192.168                                            .1.116, mask 255.255.255.0, hostname
do ping 8.8.8.8
                 ^
% Invalid input detected at '^' marker.

Router(config)#do ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/12/16 ms
Router(config)#
 

 

 

 

 

 

So i decided to check if connecting the router directly to my isp router would work and see what would happen 

 so it goes 

ISP Modem > ISP Router > Cisco 2921 Router > ( Then planning to set up a Cisco 2950 Switch with it as well ) 

 

 

I was wondering why this work instead of the original configuration i had which was 

ISP Modem > Cisco 2921 Router > (2950 Switch ) 

i feel like i cheated i process though.

It is for labs but maybe i was doing it wrong ?

 

[johnnyleano69]

This is what the set up basically looks like except i was running the ethernet from the back of the modem directly to the cisco router 

[HawkJ]

1 hour ago, johnnyleano69 said:

This is what the set up basically looks like except i was running the ethernet from the back of the modem directly to the cisco router 

Oh okay. And do you know if DHCP is ok for the Cisco router if you connect it directly to the modem? Or do they use like PPPoE? If you don’t know, we can extract some information from your current router and see if it’s DHCP or PPPoE or Static IP or if they are using something else for it. 

[HawkJ]

The reason why Cisco router is not working with the modem is probably because your ISP is expecting a different setting to DHCP from the Cisco router to connect to the internet

[Sir Asvald]

On 7/16/2020 at 4:04 AM, johnnyleano69 said:

Hi, I'm trying to set up some labs on my router and switch. I have been watching several videos on how to configure the ports on the router. I get to setting up DHCP and then when i do a "do ping 8.8.8.8" i get 0/5 succession rate. 

I ran debug mode but i also see that it says un-route able so i must be missing something. Please help 

If your Cisco router is behind your modem/Router

 

so like 

 

ip route 0.0.0.0 0.0.0.0 192.168.0.0 (IP address of your modem/router)

8 hours ago, johnnyleano69 said:

Router(config-if)#ip address dhcp

 

router

Can you type in

 

IP address dhcp set route

[johnnyleano69]

Well i think the ISP router already is configured to DHCP 

and yes i would like to find out more and what do i need to do to give u more information 

 

[johnnyleano69]

17 hours ago, HawkJ said:

The reason why Cisco router is not working with the modem is probably because your ISP is expecting a different setting to DHCP from the Cisco router to connect to the internet

Well i think the ISP router already is configured to DHCP 

and yes i would like to find out more and what do i need to do to give u more information 

[johnnyleano69]

16 hours ago, Sir Asvald said:

If your Cisco router is behind your modem/Router

 

so like 

 

ip route 0.0.0.0 0.0.0.0 192.168.0.0 (IP address of your modem/router)

Can you type in

 

IP address dhcp set route

i will do that right now 

 

[Sir Asvald]

4 hours ago, johnnyleano69 said:

i will do that right now 

 

Any luck?

 

[HawkJ]

5 hours ago, johnnyleano69 said:

Well i think the ISP router already is configured to DHCP 

and yes i would like to find out more and what do i need to do to give u more information 

The best way would be to connect the ISPs WiFi router to your laptop and try accessing the routers webpage using the browser. The default gateway on your laptop should be the IP of the ISPs WiFi router.