Increase ARP cache entries Lifespan for PVS 6.1 Servers

The default lifespan of ARP cache entries was lowered from 10min in Windows Server 2003 to a random value between 15 and 45sec in Vista/W2K8. As a result, the PVS bootstraps are twenty times more likely to experience a timeout during a Vista/W2K8 boot.

The workaround is to increase the ARP cache entry lifespan for PVS-bound NIC’s:

1. Open a command shell window. At the command prompt, enter the following command:
netsh interface ipv4 show interfaces

2. To set the ARP cache entry lifespan to 600 seconds, enter the following command:
netsh interface ipv4 set interface <PVS interface number> basereachable=600000

3. To verify the new setting, enter the following command:
netsh interface ipv4 show interface <PVS interface number>

The “Base Reachable Time” should be set to 600,000 ms, and the “Reachable Time” – to a value between 300,000 and 900,000 ms.

Source:

http://support.citrix.com/servlet/KbServlet/download/20493-102-666335/ReleaseNotes.pdf

http://support.microsoft.com/kb/949589

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