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Cisco Employee

A question about HA with 1 master and 2 slaves

 

Hi experts,

 

 

Got another HA question here. For HA, if I’m using the layer 2 VIP method and I have one master and two slaves, the configurations are as below:

 

ha token      cisco

ha interval   4

ha failure-limit 10

ha vip address    10.74.205.83

ha vip broadcast-address 10.74.205.127

ha member nso_m

address         10.74.205.71

default-ha-role master

vip-interface   eth2

!

ha member nso_s1

address         10.74.205.72

default-ha-role slave

failover-master true

vip-interface   eth3

!

ha member nso_s2

address         10.74.205.74

default-ha-role slave

vip-interface   eth4

!

 

The question is about when I deactivate the master, slave 1 will become master and slave 2 (nso_s2) will become “none”. Is it normal that slave 2 will never be the slave under the new master even if I want to do it manually (like changing the HA configurations)?

 

best regards,

Gavin Lam

 

2 REPLIES 2
Highlighted
Cisco Employee

Re: A question about HA with 1 master and 2 slaves

 

Hi Gavin,

 

 

tailf-hcc does as little as possible automagically, by design. Is the master node goes down, the fail over master will become master, and that is it (alarms are generated etc ofc, screaming for manual intervention).

 

If you want s2 to become slave to the new master manual steps must be taken. There is an action for it, so no need to change configuration. I suggest you take look at the deployment guide, "section 5.1.6 - HA Disaster Recovery".

 

 

Wheter this is normal or not I cant say.

 

Highlighted
Cisco Employee

Re: A question about HA with 1 master and 2 slaves

 

Hi Simon,

 

 

Thanks, and the HA action that you are suggesting is “force-be-slave-to member <member name>”, it’s good enough to know and have this manual way to let the slave go under the new master again.

 

 

Best regards,
Gavin

 

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