Operating System 64 Error:The specified network name is no longer available

[wdbradley]

We're seeing a lot of the above error when trying to copy a large (> 1MB) file to another computer by using either C$ or ADMIN$. This is even if you use the IP address, rather than the DNS name. This started as a failure by our Critical Patches scanner/deployer server (Shavlik's HFNetChkPro) to deploy needed patches, as it couldn't copy them.

Through experimentation, we've found that, in most cases you can connect and even map the C$ or ADMIN$, and even install DameWare for remote access (these are Win2K Pro w/SP4 or WinXP Pro w/SP1 or 2 computers), but, you cannot copy large files, or, in some cases, even install DameWare.

More experimentation proved that this error only occurs across VLAN/Subnets, not within a VLAN/Subnet.

We're on a ADS Domain (2003 version), use domain-based Windows DNS and DHCP. Our core switches are 6509's.

Any ideas?

Thanks!

[raju]

Hello,

As you said that this problem occurs between Vlan's .How many 6509's you have in your NW ?. If you have 2 6509's and this is happening with Vlan's which are active in different 6509's , then check the connectivity between both 6509's . We have similar setup as u said (win 2003 ADC with ADC integrated DNS and DHCP running in same DC. Try to copy between Vlan's which are active in same 6509 .

I have searched in Microsoft Technet also and it gave some results . Give a try in Microsoft site also , may be a bug or any Service pack update or patch update may be required.

Thanks

Raju

[wdbradley]

Thanks, I'll take a look and see...