ES-3100 Series Switch Support Notes 
 
 
 
All contents copyright (c) 2006 ZyXEL Communications Corporation.   
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A clustering member listens on UDP port 263. When a clustering member 
receives a request with the matching signature, it answers with a HDAP 
Discover Response. In the response, the clustering member provides identity 
information about itself. 
 
Step 3: 
 
 
HDAP_SET_ADDR_REQ (Master device) packet request is used for a 
clustering manager to assign an IP address and subnet mask to a clustering 
member. 
 
Step 4: 
 
 
HDPA_SET_ADDR_RSP (Slave device) packet response is for a clustering 
member to acknowledge a "Set Address" request. The hardware address 
uniquely identifies the sender of this response. 
 
After the processes are done, the cluster master will be able to manage the 
Cluster manager 
(Master device) 
3. HDAP_SET_ADDR_REQ
(Address set / Password 
challenge) 
Cluster member
(Slave device) 
Cluster manager 
(Master device) 
4. HDAP