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configure Cisco 1841 routers over a leased line

Hi

I have been trying to configure 2 cisco 1841 routers at either end of a 2MB E3 leased line.

I have a main office at one location with a small LAN using address in the 192.168.16.0/254 range.

and another office at a differnet location using an address range of 192.18.2.0/254.

I currently have the routers set up as follows:

Main Office:

Interface FastEthernet0/0
  ip address 192.168.16.250 255.255.255.0
...
Interface Serial0/0
  ip address 192.168.17.1 255.255.255.252
...
ip route 192.168.2.0 255.255.255.0 192.168.17.2


BRANCH OFFICE

Interface FastEthernet 0/0
  ip address 192.168.2.250 255.255.255.0
...
Interface Serial0/0
  ip address 192.168.17.2  255.255.255.252
 ...
ip route 192.168.16.0 255.255.255.0 192.168.17.1


using the ping function on the routers I can ping each routers ip addresses from the other router however I cannot get machines in the branch office to ping any ip adresses in the main office.

I am very new to this so any help would be much appreciated.

Thanks

Chris.
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Brandon2k1
Asked:
Brandon2k1
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1 Solution
 
suggestionstickCommented:
Hi

Can you ping the main office servers/pc's from the branch office routers, and can you ping the branch office servers/pc's from the main office router

If you do a traceroute/tracert to the main office from a branch office server/pc, where do the packets go?
Do you have any other routers at the branch office?  
is the default gateway on server/pc's at the branch office set to 192.168.2.250 or to the IP address of another router?
if the answer is yes to the previous question, have you configured dynamic/static routes for the main office on that router?  
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Brandon2k1Author Commented:
I only seem to be able to ping the routers from each other, if i try a server in the main office, none of the packets get through.

both the main office and branch office have different gateways as they access the internet through other routers. However I had presumed all i would need to do was set up a static route. For example I am working on 1 pc in particular at the branch office, so I set a static route on the machine as follows:

route add 192.168.16.0 mask 255.255.255.0 192.168.2.250

however after adding this route i try a tracert and it gets to 192.168.2.250 and then just times out.

any further ideas?
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suggestionstickCommented:
Hi


Select one PC in the main office and add a route to this PC for the branch office Subnet, otherwise it will try and send the echo-reply packet out the default gateway for the main office.
retry your ping test (pinging the PC you configured the extra route on in the previous paragraph), if it works now try adding a static route for the remote sites on the default gateway route on each site.


Trevor
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suggestionstickCommented:
Hi Sorry

in the previous post, the last paragraph should read

retry your ping test (pinging the PC you configured the extra route on in the previous paragraph), if it works now try adding a static route for the remote sites on the default gateway router on each site.
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Brandon2k1Author Commented:
All of that makes sense and I would expect it to work so I will keep trying, however surely without doing any of that i should be able to ping the router in the main office from the PC i am working on in the branch office, however all I get is request timed out.
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suggestionstickCommented:
Hi

try pinging  192.168.17.1 from the PC (Branch) on which you have added "route add 192.168.16.0 mask 255.255.255.0 192.168.2.250"  after adding "route add 192.168.17.0 mask 255.255.255.252 192.168.2.250" on the same PC
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Brandon2k1Author Commented:
Thanks for all the help, think I have finally got there with your advice.

As a seperate side issue, we are very small office wise and currently only have 1 server, this is based in the main office. is it possible to join the PC's to the domain in the main office over this connection?
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suggestionstickCommented:
Hi

You can join branch PC's to the domain via the DC on the main site.

either add static routes to the default routers on each site for the other site (also make sure that the PC's can receive ICMP) i.e. on the branch default router add add a static route for 192.168.16.0/24 and on the main default router add a static route for 192.168.2.0/24

or

Add the route to each PC on the branch site for 192.168.16.0/24 with the /p option set (permanent) and add a route for 192.168.2.0/24 on the DC, also permanent

also note that to join the PC's to the domain, you must configure each PC's DNS  setting to the DNS server on your DC (and remain so once joined to the domain),

you could also setup another DC on the Branch side (nice to have an off site DC backup :) )

Trevor



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Brandon2k1Author Commented:
thanks very much.
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