Are the MAC addresses the same on both networks? If they are, it might be confusing things.
Kurt On Wed, Dec 6, 2017 at 1:19 PM, Scott Schneider <sschnei...@inscapesolutions.com> wrote: > Time to bring in the experts, I’m stumped. > > > > I have a windows 2012 R2 server on VMware 5.1.0 with a SonicWALL NSA4500. On > the SonicWALL we have and internal and DMZ network, same with the vCenter > 5.1.0 > > The 2012 server was built on the internal network with an IP of 172.16.1.79. > The server is supposed to replace an old 2003 server in the DMZ. > > When on the internal network it pings fine and behaves normally. > > I shut down the 2003 server in the DMZ (it pings, gets out to the net and > does a normal arp –a) and duplicate the IP it uses 172.31.0.3 on the 2012 > server. > > On the VMware side I switch the network from INT to DMZ. I can ping the > server OK, get out to the net and do a normal arp -a, but the Websphere app > it runs doesn’t behave as expected. > > If I do an arp –a on the 2012 or 2003 server it shows the default gateway > 172.31.0.1 > > > > So I want to put it up on another IP in the DMZ and run the 2 servers in > parallel. I duplicate the SonicWALL rules and bring it up on IP 172.31.0.6. > I can’t ping or get out to the net. I try an arp –a and have no have default > gateway. Monitor sniffs from the SonicWALL show no traffic. > > OK I think I messed up the rules. I bring down another server using IP > 172.31.0.4 in the DMZ which can ping, do an arp –a and get out to the net > on. > > I assign the same IP 172.31.0.4 to the 2012 server and I still get no > connectivity. It only works if I bring it up on 172.31.0.3. I flushed the > arp cache on the SonicWALL each time I changed IP’s. > > What could be configed in the network on the 2012 server which could cause > this behavior? It works on the internal side 172.16.1.79 (or any other > internal IP) or with a 172.31.0.3 address in the DMZ but no other DMZ IP > will work on the 2012 server. > > > > Scott Schneider > Senior Network and System Administrator > > Inscape > T 905 952 4001 | C 705 716 4540 | Skype sschnei...@inscapesolutions.com > > inscapesolutions.com > >
