08-05-2017 12:33 AM - edited 03-08-2019 11:37 AM
Hello, I'm currently having an issue with being able to ping the IP address 8.8.8.8 with my host computer. I am using a 3550 Cisco switch and a 2621xm Cisco router with the Host computer connected to the switch along my router's 0/1 interface connected to the switch my router's 0/0 interface connected into my ISPs modem and the modem is connected to the internet.
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08-06-2017 02:50 AM
Hello
So its looks like you have L2/l3 connectivity so check the cabling
The rtr fa0/1 needs to be in a up/up state for you lan users to be able to reach internet.
res
paul
08-05-2017 02:01 AM
Hi,
There could be a lot of variables at play here.
Can you hit the outside world from the router itself? Can your host hit its default gateway which i assume is the routers 0/1 interface? Do you have the required NAT configuration?
I would start from the router itself, get connectivity working from there and then focus on the LAN side.
If you are able to post the router config this would help also.
Thanks
08-05-2017 04:34 AM
My apologies, my Cisco router can ping the outside world and my Host computer can ping its default gateway (interface 0/1).
The router's configuration is as so:
Building configuration...
Current configuration : 1931 bytes
!
version 12.2
service config
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
!
ip subnet-zero
!
!
no ip domain lookup
ip name-server 8.8.8.8
ip name-server 4.2.2.2
ip dhcp excluded-address 192.168.0.100
ip dhcp excluded-address 192.168.0.102
ip dhcp excluded-address 192.168.0.103
ip dhcp excluded-address 192.168.0.104
ip dhcp excluded-address 192.168.0.105
ip dhcp excluded-address 192.168.0.106
ip dhcp excluded-address 192.168.0.107
ip dhcp excluded-address 192.168.0.108
ip dhcp excluded-address 192.168.0.109
ip dhcp excluded-address 192.168.0.110
ip dhcp excluded-address 192.168.0.200
ip dhcp excluded-address 192.168.0.201
ip dhcp excluded-address 192.168.0.202
ip dhcp excluded-address 192.168.0.203
ip dhcp excluded-address 192.168.0.204
ip dhcp excluded-address 192.168.0.205
ip dhcp excluded-address 192.168.0.206
ip dhcp excluded-address 192.168.0.207
ip dhcp excluded-address 192.168.0.208
ip dhcp excluded-address 192.168.0.209
!
ip dhcp pool CLIENT
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.200
dns-server 8.8.8.8
!
ip audit notify log
ip audit po max-events 100
!
!
!
voice call carrier capacity active
!
!
!
!
!
!
!
!
!
mta receive maximum-recipients 0
!
!
!
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.0.200 255.255.255.0
ip nat inside
duplex auto
speed auto
!
ip nat inside source list 100 interface FastEthernet0/0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 10.0.0.1
ip http server
!
!
access-list 100 remark ==[Control NAT Service]==
access-list 100 permit ip 192.168.0.0 0.0.0.255 any
access-list 100 remark ==[Control NAT Service]==
!
call rsvp-sync
!
!
mgcp profile default
!
dial-peer cor custom
!
!
!
!
!
line con 0
logging synchronous
speed 115200
line aux 0
line vty 0 4
!
!
end
and thank you for the speedy reply!
08-05-2017 04:39 AM
Hello
no ip route 0.0.0.0 0.0.0.0 10.0.0.1
ip route 0.0.0.0 0.0.0.0 fa0/0 dhcp
res
Paul
08-05-2017 04:48 AM
Hello Paul, I've eliminated the original IP route, but when I attempt to implement your configuration I receive the following message:
Router(config)#ip route 0.0.0.0 0.0.0.0 fa0/0 dhcp
^
% Invalid input detected at '^' marker.
08-05-2017 04:57 AM
Hello
Strange ?
interface FastEthernet0/0
ip address dhcp
ip nat outside
duplex auto
speed auto
Is this correct?
could you post
ip route 0.0.0.0 0.0.0.0 fa0/0 ?
res
Paul
08-05-2017 05:01 AM
Yes, that is correct. I was able to post "IP route 0.0.0.0 0.0.0.0 fa0/0" too, but I have just checked to see if a connection to the outside world can be made from my host and it cannot.
08-05-2017 05:07 AM
Hello
Dont you have an option to apply DHCP at the end of that default route?
hence why i asked to post the output from:
IP route 0.0.0.0 0.0.0.0 fa0/0 ? - Just to see what options you have.
Also
ping 8.8.8.8 source fa0/1
res
Paul
08-05-2017 05:07 AM
I am so sorry, I've been up for a while now.
Here is that output:
Router(config)#ip route 0.0.0.0 0.0.0.0 fa0/0 ?
<1-255> Distance metric for this route
A.B.C.D Forwarding router's address
name Specify name of the next hop
permanent permanent route
tag Set tag for this route
<cr>
08-05-2017 05:10 AM
Hello
Sh ip route
ping 8.8.8.8 source fa0/1
res
Paul
08-05-2017 05:15 AM
show ip route:
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, FastEthernet0/0
Router#ping 8.8.8.8 source fa0/1
^
% Invalid input detected at '^' marker.
!--- This is the only output avalible
Router#ping 8.8.8.8 ?
<cr>
08-05-2017 05:32 AM
Hello
remote the static completely and then post
sh ip int brief
sh ip route
sh arp
sh ip nat translations
res
Paul
08-05-2017 05:52 AM
I've never actually remotely accessed my router before, so i really don't know how to. I'm sorry.
08-05-2017 05:56 AM
Hello
08-05-2017 05:56 AM
oh, were you asking me to remote into the router using vty?
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