MS NLB on ASA

ggonsoulin · ‎12-19-2007

I have a question maybe someone can answer:

Currently a PIX running 6.3(5) will work with Microsoft NLB running in unicast mode because it won't reject arp entries that are multicast ethernet with a unicast ip entry. All flavors of cisco routers I know of will reject arp updates like this from a MS server running NLB.

My question is will MS NLB unicast still work on ASA's running 7/8 code?

Thanks.

tstanik · ‎12-26-2007

The ASA is similar to a Cisco router in terms of ARP operation. So that means the static arp entry should work. This means you can still use unicast ip for NLB with ASA 7/8 code. All you need to do on the ASA is to simply map the internal ip to the public address.