If a machine on the 192.168.0.x network does not have a default gateway or
static route, then when it receives a ping from a machine on the
192.168.30.x network, it doesn't know where to send the reply - it won't
automatically send it to the server. If the 192.168.0.x machine has a
default gateway, it will send the reply there. If it has a static route for
the remote network, it will send the reply to the gateway configured for the
route.
Doug Sherman
MCSE, MCSA, MCP+I, MVP
"Alan Siu" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Alright, I think I understand what happened. The machine on B network that
> doesn't have a gateway assigned won't respond to a ping request from a
> network and vice versa. After I configure every host with proper gateway,
> everything works. Why does a machine need a gateway to respond a ping
> request? Since the routing has been enabled, I thought windows server will
> be able to deliver the request to the network that attaches on both
network
> with proper ip and subnet mask assigned. I am not familiar with routing,
is
> there any good resources you can give me for reading.
>
> Thanks,
> Alan
>
>
> "Doug Sherman [MVP]" <(E-Mail Removed)> wrote in
> message news:%2326g2j$(E-Mail Removed)...
> > 1. Check firewall and/or security software settings and make sure they
> > are
> > not set to block ping.
> >
> > 2. Check default gateways and/or static routes on any machines which do
> > not
> > respond to ping. These machine must have a valid route back to the ping
> > source machine.
> >
> > Doug Sherman
> > MCSE, MCSA, MCP+I, MVP
> >
> > "Alan Siu" <(E-Mail Removed)> wrote in message
> > news:#iKYbN$(E-Mail Removed)...
> >> Hi,
> >>
> >> Thanks for replying. I did what you said by enabling RRAS LAN Routing
> > only.
> >> I have a pc with ip 198.168.30.21 and GW 192.168.30.10 (The 2nd NIC on
> >> the
> >> server). I was able to ping one machine on the 192.168.0.X network
> >> (192.168.0.107) after enabling the router but not the others.
Strangely,
> > The
> >> pc with ip 192.168.0.107 can ping back to 192.168.30.21, but not the
> >> other
> >> machine on 192.168.30.X network.Why? am I missing something?
> >>
> >> Thanks,
> >> Alan
> >>
> >> "Doug Sherman [MVP]" <(E-Mail Removed)> wrote
in
> >> message news:OWneFg%(E-Mail Removed)...
> >> > You need to do 2 things:
> >> >
> >> > 1. On the server enable routing. You can do this with RRAS or edit
> >> > the
> >> > registry:
> >> >
> >> > HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters
> >> >
> >> > Set the value for IPEnableRouter to 1.
> >> >
> >> > 2. The machines on the 192.168.0.x network need a default gateway of
> >> > 192.168.0.10; or configure a static on the 192.168.0.x machines:
> >> >
> >> > route -p add 192.168.30.0 mask 255.255.255.0 192.168.0.10
> >> >
> >> > Doug Sherman
> >> > MCSE, MCSA, MCP+I, MVP
> >> >
> >> > "Alan Siu" <(E-Mail Removed)> wrote in message
> >> > news:u7X6tS#(E-Mail Removed)...
> >> >> Hi,
> >> >>
> >> >> I have some windows networking question that I am not sure if it can
> >> >> be
> >> >> done.
> >> >>
> >> >> I have a windows 2003 server that has two NIC cards.
> >> >>
> >> >> First NIC has an ip 192.168.0.10 mask 255.255.255.0
> >> >> The second NIC has an ip 192.168.30.10 mask 255.255.255.0
> >> >>
> >> >> The First NIC card connected to a A switch that has 192.168.0.0
> > network.
> >> >> The Second NIC card connected to a B switch that has 192.168.30.0
> >> >> network.
> >> >>
> >> >> From a PC connected to B Switch with static ip 192.168.30.11 mask
> >> >> 255.255.255.0 and gateway 192.168.30.10, I was able to ping both ip
> >> > address
> >> >> on the windows 2003 server, but if I tried to ping any PC on the
> >> > 192.168.0.0
> >> >> network (ex. ip 192.168.0.100), I won't be able to ping them.
> >> >>
> >> >> I am not too familiar with routing, and I want the network stay that
> > way
> >> > and
> >> >> don't want to add any additional euqipment to the network. How can I
> > make
> >> >> any PC on the B switch to connect to any PC in the A switch? Do I
need
> > to
> >> >> add a route or something to the PC on the B switch in order to make
it
> >> > work?
> >> >> If yes, then can you show me how? Thanks a lot.
> >> >>
> >> >> Thanks,
> >> >> Alan
> >> >>
> >> >>
> >> >
> >> >
> >>
> >>
> >
> >
>
>
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