[Serusers] failover and VRRP

[Steve Blair]

hgaillac-sip at yahoo.fr wrote:

>>I use NAGIOS to 
>>monitor SER to know when a server of applications on
>>that server have ...
>>    
>>
>
>Can you tell me more ?
>
>  
>
sipsak can be configured to respond with Nagios result codes. I think 
the option is -n. Nagios has been setup to execute sipsak with an input 
file that contains a specific notify message. This message has an event 
type of  "keep-alive". When my proxies see this event from our nagios 
host they respond with a 200  ok. This is sufficient to "verify" that 
the proxy is operational at a sip level or
so we like to believe :-)

Steve

>Harry 
>--- Steve Blair <blairs at isc.upenn.edu> a écrit :
>
>  
>
>>hgaillac-sip at yahoo.fr wrote:
>>
>>    
>>
>>>Hello,
>>>
>>>Ok SRV records point to proxy sip server but if
>>>      
>>>
>>this
>>    
>>
>>>one is down before or during connection !!!
>>>
>>> 
>>>
>>>      
>>>
>>During a connection doesn't matter in my
>>environment. I am running SER 
>>in a stateless
>>mode. Once the call is setup media flows between
>>endpoints and the proxy 
>>is out of the
>>connection. I am not using NAT either.
>>
>>    
>>
>>>             SER1
>>>DNS servers=== [?] =====sip agents
>>>             SER2
>>>
>>>How [?] can it provide H-A (heartbeat soft) between
>>>ser boxes.
>>>
>>> 
>>>
>>>      
>>>
>>Neither the SRV or VRRP can provide a heartbeat
>>between SER boxes. You'd 
>>need an application running on the SER boxes to do
>>that. I rely upon 
>>t_replicate to update the backup during
>>registration, I use NAGIOS to 
>>monitor SER to know when a server of applications on
>>that server have 
>>failed and I use an SRV record defined in each phone
>>to identify the 
>>proxy. This way the phone will failover on it's own
>>during call setup. 
>>Of course this doesn't help during a call but as I
>>said I am running SER 
>>in a stateless mode so the proxy "steps out" once
>>the call is setup.
>>
>>    
>>
>>>If one of these sip proxy failed during a call can
>>>      
>>>
>>we
>>    
>>
>>>redirect the call to the other proxy ?
>>> 
>>>
>>>      
>>>
>>I'm not sure how you would accomplish this.
>>
>>    
>>
>>>Regards
>>>Harry
>>>
>>>--- Steve Blair <blairs at isc.upenn.edu> a écrit :
>>>
>>> 
>>>
>>>      
>>>
>>>>Sorry. I don't do diagrams :-) Which piece of this
>>>>explanation is unclear?
>>>>
>>>>-Steve
>>>>
>>>>hgaillac-sip at yahoo.fr wrote:
>>>>
>>>>   
>>>>
>>>>        
>>>>
>>>>>Could you please send me a diagram ?
>>>>>
>>>>>Harry
>>>>>--- Steve Blair <blairs at isc.upenn.edu> a écrit :
>>>>>
>>>>>
>>>>>
>>>>>     
>>>>>
>>>>>          
>>>>>
>>>>>>VRRP for layer 3.  H-A woud depend upon your
>>>>>>availability requirements. 
>>>>>>In our case we use an SRV record to identify
>>>>>>multiple proxy servers each 
>>>>>>with their own priority and weight. Phones
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>>register
>>>>   
>>>>
>>>>        
>>>>
>>>>>>using the SRV name 
>>>>>>as the proxy address. Each proxy uses
>>>>>>            
>>>>>>
>>t_replicate
>>    
>>
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>>to
>>>>   
>>>>
>>>>        
>>>>
>>>>>>replicate 
>>>>>>registration data. So far this works for us.
>>>>>>
>>>>>>_Steve
>>>>>>
>>>>>>hgaillac-sip at yahoo.fr wrote:
>>>>>>
>>>>>>  
>>>>>>
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>>>>>Ok so vrrp for layer 2/3 but which solution for
>>>>>>>         
>>>>>>>
>>>>>>>              
>>>>>>>
>>>>H-A
>>>>   
>>>>
>>>>        
>>>>
>>>>>>>    
>>>>>>>
>>>>>>>         
>>>>>>>
>>>>>>>              
>>>>>>>
>>>>>>?
>>>>>>  
>>>>>>
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>>>>>Harry
>>>>>>>--- Steve Blair <blairs at isc.upenn.edu> a écrit
>>>>>>>              
>>>>>>>
>>:
>>    
>>
>>>>>>>
>>>>>>>    
>>>>>>>
>>>>>>>         
>>>>>>>
>>>>>>>              
>>>>>>>
>>>>>>>>Harry:
>>>>>>>>
>>>>>>>>Assuming you are talking about running VRRP
>>>>>>>>                
>>>>>>>>
>>in
>>    
>>
>>>>>>>>your routers and not 
>>>>>>>>on the Asterisk host itself then the answer is
>>>>>>>>                
>>>>>>>>
>>a
>>    
>>
>>>>>>>>qualified yes. VRRP by 
>>>>>>>>itself won't give you the transparency of an
>>>>>>>>                
>>>>>>>>
>>SRV
>>    
>>
>>>>>>>>record for identifying 
>>>>>>>>your proxy servers. It will allow you to have
>>>>>>>>automatic failover to 
>>>>>>>>backup gateways should the primary gateway
>>>>>>>>           
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>>>to/from
>>>>   
>>>>
>>>>        
>>>>
>>>>>>>>your "SER subnet" fail.
>>>>>>>>
>>>>>>>>-Steve
>>>>>>>>
>>>>>>>>hgaillac-sip at yahoo.fr wrote:
>>>>>>>>
>>>>>>>> 
>>>>>>>>
>>>>>>>>      
>>>>>>>>
>>>>>>>>           
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>>>>>>>>hello,
>>>>>>>>>
>>>>>>>>>Can we use VRRP when a SER is down ?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>           SER1 (master)
>>>>>>>>>sip agents == ||  === Asterisk Farm==sip/pstn
>>>>>>>>>   
>>>>>>>>>
>>>>>>>>>        
>>>>>>>>>
>>>>>>>>>             
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>>>>>gateway
>>>>>>>> 
>>>>>>>>
>>>>>>>>      
>>>>>>>>
>>>>>>>>           
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>>>>>>>>           SER2 (slave)
>>>>>>>>>
>>>>>>>>>Regards
>>>>>>>>>Harry
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>	
>>>>>>>>>
>>>>>>>>>	
>>>>>>>>>		
>>>>>>>>>   
>>>>>>>>>
>>>>>>>>>        
>>>>>>>>>
>>>>>>>>>             
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>>___________________________________________________________________________
>>>>>          
>>>>>
>>>>>>       
>>>>>>            
>>>>>>
>=== message truncated ===
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