Telnet/FTP delayed response -intermittent

[Vimal Upreti <vimal@xxxxxxxxxxxx>]

Hi all,

Recently I'm facing a strange problem of delayed response of TELNET/FTP
in all the Alphaservers (8200/ES45/DS20E). There are 3 TruClusters of 2
Servers each & one standalone Alphaserver. 
When I telnet/FTP from some PCs or Alphaservers to other Alphaservers,
the response to get Login takes 30-35 Sec. while in some of the PCs or
Alpha, it takes fraction of Sec. to get Login prompt.
To troubleshoot the Network Problem, I connected few Alphaservers with a
Local Switch & checked TELNET/FTP, Still the response was very slow
(30-35 Sec).  

I have tried Telnet/FTP through IP Address, it takes the same time
i.e.-30-35 Sec. to get the Login.
Can somebody guide me to diagnose & rectify this problem.
Also, this site is badly affected by Blaster Virus

Thanks & regards.
Vimal Upreti