2 DCE SERVER Mirror configuration

[DCIM_Support]

This question was originally posted on DCIM Support by Hojjat Saeidi on 2017-10-15

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I have 2 DCE 7.2.0 i want know How can i configuration mirror 2 dce server ?

can i do that like two server ?

(CID:126164008)

[DCIM_Support]

This answer was originally posted on DCIM Support by Steven Marchetti on 2017-10-16

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Hi Hojjat,

there can be no real "mirrror" configuration in DCE. You can have 2 systems monitor the same devices but if you make a change in one, it will not be reflected on another. It will simply be 2 separate systems. Please keep in mind that NetBots should not be monitored by more than 2 DCE servers. 

Steve. 

(CID:126164051)

[DCIM_Support]

This comment was originally posted on DCIM Support by spezialist on 2017-10-16

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Hi Steven Marchetti,

Please keep in mind that NetBots should not be monitored by more than 2 DCE servers.

Ok, then two questions about NetBotz and 2+ DCE-servers:

1. To which NetBotz devices this restriction applies (old NetBotz appliance, NetBotz-200 or new NetBotz-250)?
2. What happens if this restriction is not met? What is the catch?

Very thanks for the support.

(CID:126164174)

[DCIM_Support]

This comment was originally posted on DCIM Support by Steven Marchetti on 2017-10-16

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spezialist, Original NetBotz that communicate via HTTP or HTTPS to DCE have issues with surveillance when being monitored by more than 2 DCE servers. Keep in mind that unlike SNMP that polls the current data only, DCE polls a NetBotz device (non SNMP) for ALL data that has been logged since last contact. This can put a great deal of strain on the system if you're trying to monitor by 3 or 4 systems AND trying to use surveillance especially. As an example of what can happen:
http://www.apc.com/us/en/faqs/index?page=content&id=FA158397 

Steve

(CID:126164349)

[DCIM_Support]

This comment was originally posted on DCIM Support by spezialist on 2017-10-16

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Hi Steven Marchetti,

Thanks for the clarification: i.e., the above limitation applies only to old NetBotz appliances and the new NetBotz-250 and only if video surveillance is used. Since I have a practical case, when NetBotz-450 is monitored by three DCE-servers (every minute) for several years. And so far I have not seen any problems at all, since there is no video surveillance.

Very thanks for the support.

(CID:126164547)

[DCIM_Support]

This comment was originally posted on DCIM Support by Steven Marchetti on 2017-10-16

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@spezialist, There is no official limitation, Like most things in NetBotz, there has been no limitation coded in so you can keep doing it until you can't. This is just something we've seen and troubleshot so it's what we recommend. You can add the devices to as many servers as you want but if you end up running into issues, the first thing you'll probably want to do is lower the load. Once you start alerting a lot and sending clips and doping surveillance, things can get out of hand very easy.

There has been no official testing with a full complement of sensors and cameras and numerous DCE servers monitoring it then doing surveillance and setting all thresholds to alert in every different possible alert action. That's pretty much what they'd have to do to officially set limits and still if you have 50 temp sensors, it may react differently than if you had 50 state sensors...just too many potential combinations to test.

The 250 is an SNMP device and has no surveillance option so it does not fall into this category. The surveillance issue I noted could be version 2 NetBotz (320, 420, 500) or version 3 (355, 45x, 550/570) devices.

Steve

(CID:126164577)

[DCIM_Support]

This comment was originally posted on DCIM Support by spezialist on 2017-10-16

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Hi Steven Marchetti,

Ok, thanks for the detailed explanation. I think it will be useful in my work.

Very thanks for the support.

(CID:126164665)

[DCIM_Support]

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