Discussion:
Partial internet
(too old to reply)
john
2010-07-22 14:06:55 UTC
Permalink
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
JohnB
2010-07-22 14:44:19 UTC
Permalink
Start troubleshooting "near" and work out from there:
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
Post by john
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
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john
2010-07-22 16:38:31 UTC
Permalink
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with  5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
JohnB
2010-07-22 19:39:13 UTC
Permalink
From a command prompt do a "route print". Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.



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john
2010-07-22 20:01:50 UTC
Permalink
From a command prompt do a "route print".  Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
I did a route print however I could not see my gateway address (which
is static) at all.
JohnB
2010-07-22 20:29:30 UTC
Permalink
Post by john
I did a route print however I could not see my gateway address (which
is static) at all.
Are both the working PCs and non-working PCs all set to static IP?

Post an ipconfig from a working and a non-working PC.
Post by john
From a command prompt do a "route print". Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
I did a route print however I could not see my gateway address (which
is static) at all.



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john
2010-07-22 21:56:17 UTC
Permalink
Post by JohnB
Post by john
I did a route print however I could not see my gateway address (which
is static) at all.
Are both the working PCs and non-working PCs all set to static IP?
Post an ipconfig from a working and a non-working PC.
Post by john
From a command prompt do a "route print". Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
I did a route print however I could not see my gateway address (which
is static) at all.
I had a hard time converting the screen capture but for the working pc
is:

Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1


for the non-working its the same with IP of:

192.168.1.101

but it has blank for gateway.

BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
JohnB
2010-07-23 12:25:21 UTC
Permalink
Post by JohnB
Post by john
but it has blank for gateway.
Don't you think that's your problem?

That's why you're getting "destination host not found". That's an
indication that there is no known route to the remote network. If a PC
sends a packet that is to a different subnet, in this case the interenet, it
forwards that packet to it's default gateway. If there is no DG defined,
then there is no known route to the remote network.

Why does it show as blank, if you are using DHCP on that PC as you said?
Post by JohnB
Post by john
I did a route print however I could not see my gateway address (which
is static) at all.
Are both the working PCs and non-working PCs all set to static IP?
Post an ipconfig from a working and a non-working PC.
Post by john
From a command prompt do a "route print". Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am
missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
I did a route print however I could not see my gateway address (which
is static) at all.
I had a hard time converting the screen capture but for the working pc
is:

Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1


for the non-working its the same with IP of:

192.168.1.101

but it has blank for gateway.

BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.



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john
2010-07-24 14:22:37 UTC
Permalink
Post by JohnB
Post by JohnB
Post by john
but it has blank for gateway.
Don't you think that's your problem?
That's why you're getting "destination host not found".  That's an
indication that there is no known route to the remote network.  If a PC
sends a packet that is to a different subnet, in this case the interenet, it
forwards that packet to it's default gateway.  If there is no DG defined,
then there is no known route to the remote network.
Why does it show as blank, if you are using DHCP on that PC as you said?
Post by JohnB
Post by john
I did a route print however I could not see my gateway address (which
is static) at all.
Are both the working PCs and non-working PCs all set to static IP?
Post an ipconfig from a working and a non-working PC.
Post by john
From a command prompt do a "route print". Does the first line list your
router under gateway?
Post by JohnB
- do those PC's have valid a Valid IP config for that subnet, i.e. the
address, Subnet mask and gateway.
- can you ping the default gateway (the router)
- If yes, can you ping an IP address on the internet, for ex. 4.2.2.2
I have a small network , 2k3, with 5 computers. They all can ping
each other and can use each other's resoruces. The problem is that the
two computers on the right of the server cannot connect to the
internet. Is any setup on the modem or router that I am missing?Would
really appreciate any input on this.
It does have a valid ip configuration. I can ping the router with no
problem, but this is where it stops. I cannot ping internet addresses
at all.It gives "destination host unreachabel" message.
I did a route print however I could not see my gateway address (which
is static) at all.
I had a hard time converting the screen capture but for the working pc
Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1
192.168.1.101
but it has blank for gateway.
BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
I know its my problem. I don't know what to do about it.
JohnB
2010-07-26 12:26:14 UTC
Permalink
Post by john
I had a hard time converting the screen capture but for the working pc
Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1
192.168.1.101
but it has blank for gateway.
BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
Just to be clear:
- are both of the above PCs are set to DHCP?
- But when you do IPconfig from the non-working PC, the gateway field is
blank?

If you set the non-working PC to static, with a gateway, can it reach the
internet?

If the gateway is blank in ipconfig, you can try resetting TCPIP:
http://support.microsoft.com/kb/299357
Post by john
I know its my problem. I don't know what to do about it.
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john
2010-07-26 15:48:17 UTC
Permalink
Post by JohnB
Post by john
I had a hard time converting the screen capture but for the working pc
Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1
192.168.1.101
but it has blank for gateway.
BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
- are both of the above PCs are set to DHCP?
- But when you do IPconfig from the non-working PC, the gateway field is
blank?
If you set the non-working PC to static, with a gateway, can it reach the
internet?
If the gateway is blank in ipconfig, you can try resetting TCPIP:http://support.microsoft.com/kb/299357
Post by john
I know its my problem. I don't know what to do about it.
Yes when I give it static ip with a gateway they work. I am just
baffled as to why the gateway is blank when using DHCP. How would I
reset TCP/IP?
JohnB
2010-07-26 16:22:10 UTC
Permalink
This is the command to reset TCPIP: netsh int ip reset resetlog.txt
But I don't think that's going to help, if it is working correctly with
static IP. There must not be a problem with TCPIP on that PC.

What's the OS on the problem PC?

One thing you could try is connect the problem PC directly to the cable
modem - power cycle the cable modem - and see if the PC gets a DHCP address
that includes the default gateway.

I don't believe you ever said; is DHCP coming from the 2k3 server or the
router?
Are you sure DHCP is only enabled on one of those, and not both?
Post by JohnB
Post by john
I had a hard time converting the screen capture but for the working pc
Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1
192.168.1.101
but it has blank for gateway.
BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
- are both of the above PCs are set to DHCP?
- But when you do IPconfig from the non-working PC, the gateway field is
blank?
If you set the non-working PC to static, with a gateway, can it reach the
internet?
If the gateway is blank in ipconfig, you can try resetting
TCPIP:http://support.microsoft.com/kb/299357
Post by john
I know its my problem. I don't know what to do about it.
Yes when I give it static ip with a gateway they work. I am just
baffled as to why the gateway is blank when using DHCP. How would I
reset TCP/IP?



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john
2010-07-27 15:56:31 UTC
Permalink
This is the command to reset TCPIP:  netsh int ip reset resetlog.txt
But I don't think that's going to help, if it is working correctly with
static IP.  There must not be a problem with TCPIP on that PC.
What's the OS on the problem PC?
One thing you could try is connect the problem PC directly to the cable
modem - power cycle the cable modem - and see if the PC gets a DHCP address
that includes the default gateway.
I don't believe you ever said; is DHCP coming from the 2k3 server or the
router?
Are you sure DHCP is only enabled on one of those, and not both?
Post by JohnB
Post by john
I had a hard time converting the screen capture but for the working pc
Ip: 192.168.1.103
mask: 255.255.255.0
gateway: 192.168.1.1
192.168.1.101
but it has blank for gateway.
BTW all pc's wirth the exception of the server are set to obtain IP
and DNS automatically.
- are both of the above PCs are set to DHCP?
- But when you do IPconfig from the non-working PC, the gateway field is
blank?
If you set the non-working PC to static, with a gateway, can it reach the
internet?
If the gateway is blank in ipconfig, you can try resetting
TCPIP:http://support.microsoft.com/kb/299357
Post by john
I know its my problem. I don't know what to do about it.
Yes when I give it static ip with a gateway they work. I am just
baffled as to why the gateway is blank when using DHCP. How would I
reset TCP/IP?
OS on the working and non-working is XP SP2. I tried connecting
straight to a non-working PC and it did get a default gateway, but
when I put it back the way it was , DG was blank again. DHCP comes
both from Sever2k3 and modem, but that wouldn't explain why one PC has
no problem and the other two do.
Brian Cryer
2010-07-30 11:52:13 UTC
Permalink
Post by john
OS on the working and non-working is XP SP2. I tried connecting
straight to a non-working PC and it did get a default gateway, but
when I put it back the way it was , DG was blank again. DHCP comes
both from Sever2k3 and modem, but that wouldn't explain why one PC has
no problem and the other two do.
Sorry, come in late on this discussion.

DHCP won't come from both the server and the modem. If you have DHCP enabled
on the modem then the server will probably shut its DHCP down. This is good
because you don't want both devices allocating IP addresses. Enable it at
one or the other but not both.
--
Brian Cryer
http://www.cryer.co.uk/brian
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