Re: subnetting help

[Stephane Bortzmeyer <bortzmeyer at gitoyen.net>]

On Tuesday 18 March 2003, at 0 h 57, 
Paul Ademola Ajayi <ademolaajayi72 at yahoo.com> wrote:

> pls I was given 64.110.88.0/25 from my uplink provider which I now subnet 
> into three /26, /27 and /28. I now need to create a route for those subnet,
> which I did this way 64.110.88.0 255.255.255.240 64.110.88.68, 64.110.88.0 
> 255.255.255.224 64.110.88.68 and the /26 is directly cooneted to 
> ethernet 0/0 becos my default is 0.0.0.0 0.0.0.0 serial0/0.
  ^^^^^^^^^^^^ 
  So, your router is a Cisco/IOS ?

> 64.110.88.68 is my linux box gateway router. 

I'm confused because the above interface names do not smell Linux.

I suggest that you post the actual config, because the data you give makes no 
sense. netmask is your friend. Example, Linux syntax :

ifconfig eth0 64.110.88.1 netmask 255.255.255.192 # /26
route add -net 64.110.88.64/27 gw X.Y.Z.W
route add -net 64.110.88.96/28  gw X.Y.Z.W
# route add -net 64.110.88.112/28  gw X.Y.Z.W # Reserved

And the same, IOS syntax:

ip subnet-zero
ip classless
interface Ethernet0
  ! /26
  ip address 64.110.88.1 netmask 255.255.255.192
ip route 64.110.88.64 255.255.255.224 X.Y.Z.W
ip route 64.110.88.96 255.255.255.240 X.Y.Z.W
! Reserved
! ip route 64.110.88.112 255.255.255.240 X.Y.Z.W

> route for my /25 or what? and my client complain of ip conflict, whta could be 
> the cause of this problem?

The main cause is that your network is not properly documented. I've read your message several times and it is stil difficult to understand its architecture. A nice ASCII diagram would help.





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