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Methods and apparatus for determining, verifying, and rediscovering network IP addresses
| Details |
Inventors: Scott, John A.;
Assignee: EMC Corporation (Hopkinton, MA)
Primary Examiner: Matar; Ahmad F.
Assistant Examiner: Winder; Patrice
Attorney, Agent or Firm: Clapp, Esq.; G. D.
A method and apparatus for assigning a network address of a target server/host system in a network system having server/host systems interconnected by network links. The apparatus includes a first part residing in a management server/host system and a second part residing in the target server/host system and each part includes a plurality of network address sub-mechanisms and an address manager mechanism for controlling operation of the network address mechanisms. The network address mechanism include, for example, a setup wizard mechanism, a reverse address resolution protocol mechanism, a unit-cast address discovery mechanism and a dynamic host configuration protocol mechanism. The address manager mechanism directs the operation of the network address sub-mechanisms through three modes of operation designated as the address discovery mode, the address verification mode and the operation mode, using each network address sub-mechanism cooperatively and in its own mode of operation, and in certain instances concurrently, to obtain a network address, a subnetwork mask and a gateway address for the target server/host system. |
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DETAILED DESCRIPTION The present invention is directed to an address discovery and verification apparatus for assigning a network address to a target server/host system in a network system wherein the network system includes a plurality of server/host systems interconnected by network links and the method of operation of the apparatus.
According to the present invention, the address discovery and verification apparatus, and the method for using the apparatus, includes a first part residing in a management server/host system and a second part residing in the target server/host system.
The first and second parts of the address discovery/verification mechanism each include a plurality of network address sub-mechanisms, including a setup wizard mechanism, a reverse address resolution protocol mechanism, and a unit-cast address discovery mechanism, and an address manager mechanism for controlling operation of the network address mechanisms.
The address manager mechanism directs the operation of the network address sub-mechanisms through three modes of operation designated as the address discovery mode, the address verification mode and the operation mode.
In the address discovery mode, the address manager mechanism initiates concurrent operation of the reverse address resolution protocol mechanism, the setup wizard mechanism and the unit-cast address discovery mechanism to transmit reverse address resolution protocol requests and to monitor the network links for a reverse address resolution protocol response, to monitor the network links for a setup wizard configuration packet, and to monitor the network links for a uni-cast echo packet.
The address manager mechanism the directs the reverse address resolution protocol mechanism, the setup wizard mechanism or the unit-cast address discovery mechanism to extract a received network address from the first received of a reverse address resolution protocol response, a setup wizard configuration packet or a uni-cast echo packet.
The address manager mechanism directs the network address sub-mechanisms in obtaining a subnetwork mask and a gateway address
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