|
On Friday 02 August 2002 22:10, Greg Woods wrote:
> OK, that's what I thought. So that means that if the router is doing
> dynamic ARP caching, then the director's ARP entry for the VIP will get
> overwritten with the real server's MAC. Dynamic ARP caching, if in fact
> this is what the router is doing, will break LVS DR.
I don't think a reply packet from a real server's VIP will generate ARP
traffic. The original ARP request is answered by the directord and the
realserver is not supposed to answer to any ARP request. That's basically
what the hidden patch is all about (or in the case of a win2k realserver,
using a loopback adapter for the VIPs), not replying to ARP requests.
The above of course only holds if the router doesn't try to update ARP entries
based on IP traffic that passes through it, instead of using only real ARP
traffic. But I don't expect a Cisco to violate standards and try to be
'smart' by bypassing the standard ARP mechanism.
--
Martijn
|
