Knackered network

  • Thread starter Thread starter Craig
  • Start date Start date
C

Craig

I have 6 windows 2000 servers including 1 running dhcp
and 2 running dynamic dns, and about 350 workstations all
on the same network.

I am experiencing a problem whereby some of the
workstations cannot communicate on the network where
their ip address has been allocated from dhcp.

Ipconfig /all command shows that all configuration
settings are correct but cannot ping anything.

Some other workstations can communicate normally except
for with certain servers, i.e. web server.

If I delete the lease from the active leases list in dhcp
and renew on the workstation it sometimes fixes the
problem.

Also, most workstation rebuilds will fail unless their
computer account is deleted from the network first.

Any help gratefully received.
 
Hi Craig,

Thank you for the posting.

Based on your description, the client has obtain the IP correctly but they
cannot ping.

In order to verify this issue, please check the following:

1. Are their IPs all in the same network segment with the same Submet Mask,
Default Gateway and DNS?
2. What's the exact results of ping? Request timeout or unknown host?
3. Can they ping via IP? Can they ping via computer name? Are the results
the same?

Considering this issue, we are providign you with the following two
suggestions:

Suggestion one:

ipconfig /release
ipconfig /renew

Suggestion two:

Manually configure static IP for those problem clients

If the above two suggestions work, it indicates the problem client did not
obtain correct IP from the dhcp server when the problem occurred and you
may need to check the dhcp server configuration.

If you can ping IP but cannot ping computer name, the cause lies in the DNS
server.

Hope the above information and suggestion helps and answers your question.
If anything is unclear or if there is anything further we can help you with
from our side, please let me know.

Sincerely,

Cherry Qian
MCSE2000, MCSA2000, MCDBA2000
Microsoft Partner Online Support


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Good morning, Craig!
Are all the workstations on the same IP subnet (/23, presumably), or are
they different subnets and routed?

If they're on the same subnet, I'd add another DHCP server for half of the
subnet, so each will have DHCP and DDNS. If they're routed, I'd suggest
putting a DHCP server with DDNS on that subnet. You might also add WINS and
the appropriate entries to hosts/lmhosts to help resolve servers.

HTH,
Kara
 
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