SAP Netweaver 7.0 Web Dispatcher HA Setup with Sun Cluster 3.2

Hi,
How to HA SAP web dispatcher, which is not mentioned in the guide 'Sun Cluster Data Service for SAP Web Application Server Guide for Solaris OS'.
Since I do not want to install central instance within the cluster, should I install two standalone web dispatcers within the two nodes, and then HA it? Or maybe just install it on the shared storage with CFS once?
And specifically, what kind of resource type should I use for it? SUNW.sapwebas?
Thanks in advance,
Stephen

Hi all.
I am having a similar issue with a Sun Cluster 3.2 and SAP 7.0
Scenrio:
Central Instance (not incluster) : Started on one node
Dialog Instance (not in cluster): Started on the other node
When I create the resource for SUNW.sap_as like
clrs create --g sap-rg -t SUNW.sap_as .....etc etc
in the /var/adm/messages I got lots of WAITING FOR DISPACHER TO COME UP....
Then after timeout it gives up.
Any clue? What does is try to connect or waiting for? I hve notest that it's something before the startup script....
TIA

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