Environment
Novell ZENworks 11 Configuration Management 
  Situation
L4 switch rule for Content causes inaccessible content.
From zmd-messages.log:
[CacheProxy] [] [Content server  https://switchserver.novell.com:80/zenworks-content/  is an L4 switch] [] [] 
[CacheProxy] [] [Servers behind l4 switch  https://switchserver.novell.com:80/zenworks-content/  are : zenpri1.novell.com , 192.168.0.111, zenpri2.novell.com , 192.168.0.112 , ] [] [] 
[CacheProxy] [] [Trying to determine if 192.168.0.111 is a fronted server behind  https://switchserver.novell.com:80/zenworks-content/ ] [] [] 
[CacheProxy] [] [192.168.0.111 is a fronted server] [] [] 
[CacheProxy] [] [Trying to determine if 192.168.0.112 is a fronted server behind  https://switchserver.novell.com:80/zenworks-content/ ] [] [] 
[CacheProxy] [] [192.168.0.112 is a fronted server] [] []
[CacheProxy] [] [Effective sources after GetEffectiveSourcesInL4SwitchZone are: https://switchserver.novell.com/zenworks-content/guid.zc , ] [] []
[CacheProxy] [] [Effective sources after GetEffectiveSourcesInL4SwitchZone are: https://switchserver.novell.com/zenworks-content/guid.zc , ] [] []
[ContentManager] [] [No effective sources available for content id guid.] [] [] 
[ContentManager] [] [(Thread 16) Content for id guid has 2 remote sources but none are effective][] [] 
Resolution
 This is fixed in version 11.1 - see KB 7008746 "ZENworks Configuration Management 11.1 - update information and list of fixes" which can be found at https://www.novell.com/support