24
loopback adapter on servers can be found in the “How to Add a Loopback
Adapter” section. In case the server is running Windows® 2003/2008, the route
created when adding a loopback adapter cannot be deleted; please make sure
the loopback adapter metric has a higher number.
2) If your service binds to any specific IP address, add the loopback adapter’s IP
address to that service.
The firewall configuration must be changed to point to the new farm address on the
WebMux. Since the WebMux always uses one IP address in the server LAN, the
farm address must be a different IP address in the server LAN in Out-of-Path Mode.
Out-of-Path Mode also allows for redundancy. The two WebMux units are
connected to each other through a straight or crossover Ethernet cable or with a
hub or switch in between.
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Under normal Out-of-Path operations, you will only need to set the external
gateway IP address for the WebMux. However, if you are going to have the
WebMux perform SSL termination, you must set a “server LAN gateway” IP in
the WebMux and have the servers’ default gateway point to that IP address.
Details About Out-of-Path Mode
Since firmware version 8.2.03, the WebMux bonds the “Internet” and “Server” ports in a Link
Aggregation Group. If you have switch that has “LAG,” “EtherChannel,” or “Port Channel”
capabilities, the “Internet” and “Server” interfaces will behave as a single interface and effectively
double the amount of data throughput. Prior to version 8.2.03, the “Internet” port was deactivated
in Out-of-Path Mode.
IPv6 Considerations
The WebMux can load balance IPv4 and IPv6 traffic in all above modes. Both IPv4 and IPv6 can
work in Layer 4. Simply specifying the IPv6 prefix will enable WebMux load balancing in IPv6 only.
Because IPv6 uses the colon (:) symbol in the address, there are special considerations needed
when using the IPv6 address in a web browser because the colon (:) is also used to denote a port
number (i.e. 192.168.12.21:24). Because accessing the WebMux unit’s web management requires
access to port 24, you cannot simply put the IPv6 address in the address bar of the browser like
you would for an IPv4 address. You must enclose the address in brackets ([]). For example, if the
IPv6 address of the WebMux is fec0::c0a8:c15, then you would enter http://[fec0::c0a8:c15]:24/ to
get to the web management.
There are also IPv6 versions of some basic networking tools such as ping6, traceroute6, and
tcpdump with the IPv6 flag, ip –f inet6, route –inet6, etc. in the CLI. Please be sure that network
software/client is indeed IPv6 capable or is the correct IPv6 version to use before assuming that
your network is not working.
Also, when adding an IPv6 address to your server’s NIC (network interface card), your server’s OS
might not automatically add a default gateway in its routing table for the IPv6 address. Please
double check the routing tables and make sure the proper entries are there. If your servers are not
