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devel:device_data_model [2007/07/03 19:44]
morten added data model mapping tables
devel:device_data_model [2007/07/04 07:48]
morten some ideas for future changes
Line 42: Line 42:
 | Commander ​     | netbox & module | | Commander ​     | netbox & module |
 | Member ​        | module ​         | | Member ​        | module ​         |
 +
  
  
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 HP has many products that stack in this way, they call it HP Switch Stacks. ​ Some Cisco devices also support this type of stacking, but they call it //​clustering//​. ​ According to Cisco documentation,​ physical 3750 switch stacks can also participate in switch clusters, making the chaos complete ;-) HP has many products that stack in this way, they call it HP Switch Stacks. ​ Some Cisco devices also support this type of stacking, but they call it //​clustering//​. ​ According to Cisco documentation,​ physical 3750 switch stacks can also participate in switch clusters, making the chaos complete ;-)
  
-NAV does not currently support Cisco Clustering (NAV 3.2).+NAV does not currently support Cisco Clustering (NAV 3.2). If a cluster is added to NAV, NAV will only see the commander device of the cluster. ​ For more information about Cisco Clustering, please go to [[http://​www.cisco.com/​univercd/​cc/​td/​doc/​product/​lan/​cat3750/​12119ea1/​3750scg/​swclus.htm|this page on Cisco'​s web site]].
  
  
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 | Commander ​     | netbox & module | | Commander ​     | netbox & module |
 | Member ​        | module ​         | | Member ​        | module ​         |
 +
 +
 +===== Future changes =====
 +
 +The way in which NAV supports HP switch stacks today is a bit contrived (read: hackish), and is, IMNSHO, implemented at the wrong code layer.
 +There are some ideas to change the way NAV models virtual stacks, which would also make it easier to implement support for Cisco Clustering. ​ These ideas concern themselves with modelling the members of such stacks as automatically generated netboxes with a dependency on the commander netbox. ​ This will enable NAV to view these members for what they are: Operationally independent devices, who happen to share an IP address with another device, but with a different SNMP community. ​
 +
 +Administratively,​ one still wishes to view a virtual stack as a whole, which means the bulk of changes would be in the web user interface to make sure these stacks are presented mostly as before.
 +
 +These ideas aren't fully fleshed out yet, but more work will be put into that around late August 2007.
  
devel/device_data_model.txt ยท Last modified: 2007/07/04 13:08 by morten