arp gets wrong MAC address

[Seing]

Hello,

I have a Win2k server that sends emails to a smtp server.
These 2 servers are on the same subnet so smtp traffic
between them should not cross the router. However, when I
do a arp -a on the Win2k server, the IP address for the
smtp server shows the mac address of the router gateway
instead of the smtp server. Is there a reason why this is
happening? Obviously this is causing connectivity issues
between them.

My temporary solution is to delete the arp entry using
arp -d IP_ADDR and add a static entry to it. This seems to
work. The server has been running for 2 years and this
problem started happening recently. Is there a better
solution than using static arp entry? TIA.

Seing

 

[Alan Wood [MSFT]]

Hi Seing,
Could we get an IPConfig /all and ARP -a off both systems you are
reffering to?

If not who bout the IPaddress and subnet masks although I preffer the
output of IPCONFIG /all

Thanks!

Alan Wood[MSFT]

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