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Frequent Contributor II

IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

What is the diffrence between High Availability Inter-Controller Heartbeats and normal VRRP model MASTER-Standby Master?

Guru Elite

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

With HA, the AP creates a standby tunnel to the other controller allowing for sub-second stateful failover.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Frequent Contributor II

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

Ok thats like a Back-up LMS ?

Guru Elite

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

Similar, but HA is subsecond and client state is synched between controllers in an HA group.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Aruba

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

Tim is correct.   For some more details, have a look at the section in the 6.4 user guide that covers HA heartbeats:

 

http://www.arubanetworks.com/techdocs/ArubaOS_64_Web_Help/Web_Help_Index.htm#ArubaFrameStyles/VRRP/HighAvHeartbeats.htm

 

The inter-controller heartbeats only apply when using the new high availability models of 6.4; not traditional primary/backup LMS or VRRP primary LMS based deployments.

 

 

------------------------------------------------
Systems Engineer, Northeast USA
ACCX | ACDX | ACMX

Occasional Contributor II

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

Is it subsecond in total or only for the AP's?

Example: a controller, with 1000AP and around 3000users, fails and this HA feature is used, would all these be on the backup controller within 1 second?

 

Are there any test beds performed on this feature?

Guru Elite

Re: IN OS 6.4 what is High Availability Inter-Controller Heartbeats?

- The intercontroller heartbeat between the standby and the active controller occurs every 100 miliseconds

- After 5 missed heartbeats the standby controller will ask the APs to fail over to the standby controller

- How long it takes for the AP to failover  is usually a second or less.

- Users get disassociated from the AP when this happens and they have to reassociate after the AP comes up on the standby.

- How long it takes depends on the client, more than anything.

 



Colin Joseph
Aruba Customer Engineering

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