Intergraph WebScale User Manual page 56

WebScale™
services across the cluster. It also adds high availability because NetBIOS connections
are automatically retried when a cluster host fails. This feature supports browsing for
cluster-hosted shares that have been mounted as local drives using the net use
command. However, the cluster's NetBIOS machine name currently does not appear in
the Network Neighborhood folder.
To scale Microsoft (read-only) file or print services using WebScale, create a port rule
for port 139 with Multiple Hosts filtering mode and Single client affinity. Be sure that
the file shares or printers to be accessed by clients are identically available on all cluster
hosts. (To identify the host to which a client connects, you may want to place a special
file called hostname on each host's share that contains the name of the particular cluster
host.) On the client systems that will access the cluster, mount the desired cluster-
hosted shares or printers using the net use command. For example, to mount a file
share, use the following command, where x: is the clients' local drive for the share and
cluster is the cluster's NetBIOS machine name:
net use x: \\cluster\share_name
The cluster's NetBIOS machine name is the host name within the Full Internet name,
which is entered via the WebScale Setup dialog. In order for the clients to locate the
cluster via this cluster NetBIOS name (by resolving cluster NetBIOS name to the
cluster's IP address), you will need to create the appropriate static WINS or DNS entry;
please consult your Microsoft documentation for instructions on how to do this. The
cluster hosts will not advertise the cluster's NetBIOS name, but they will answer
requests made to it. The individual cluster hosts will continue to advertise and respond
to their respective NetBIOS machine names in addition to the cluster's machine name.
Note: Microsoft's NBT support only uses the first IP address on each NIC to which the
WINS Client is bound. To make use of the cluster IP address and retain normal access
to the cluster host with its dedicated IP address, you must have two NIC's in each
cluster host. This constraint is a limitation of NBT support, not of WebScale.
NBT support is enabled by default. You can disable it by changing the
NBTSupportEnable registry parameter value from 1 to 0.
Adjusting Multicast Parameters
WebScale uses one of two methods to enable the cluster NIC's on all cluster hosts to
simultaneously receive network traffic for the cluster's IP address(es):
When multicast support is enabled in the WebScale Setup dialog, WebScale adds
a multicast MAC address to the cluster NIC's on all cluster hosts. The cluster
NIC's retain their original MAC addresses.
Otherwise, WebScale instructs the cluster NIC's driver (via the Windows NT
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User's Guide