[write_standby] update write_standby.py script #11650
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The initial value has to be present for the state machines to work. In active-standby dual-tor scenario, or any hardware mux scenario, the value will be updtaed eventually with a delay. However, in active-active dual-tor scenario, there is no other mechanism to initialize the value and get state machines started. So this script will have to write something at start up time. For active-active dualtor, 'active' is a more preferred initial value, the state machine will switch the state to standby soon if link prober found link not in good state. Signed-off-by: Ying Xie <ying.xie@microsoft.com>
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prsunny
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Aug 8, 2022
prsunny
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Aug 9, 2022
theasianpianist
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Aug 9, 2022
yxieca
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Aug 9, 2022
Why I did it The initial value has to be present for the state machines to work. In active-standby dual-tor scenario, or any hardware mux scenario, the value will be updtaed eventually with a delay. However, in active-active dual-tor scenario, there is no other mechanism to initialize the value and get state machines started. So this script will have to write something at start up time. For active-active dualtor, 'active' is a more preferred initial value, the state machine will switch the state to standby soon if link prober found link not in good state. How I did it Update the script to always provide initial values. How to verify it Tested on active-active dual-tor testbed. Signed-off-by: Ying Xie ying.xie@microsoft.com
skbarista
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Aug 17, 2022
Why I did it The initial value has to be present for the state machines to work. In active-standby dual-tor scenario, or any hardware mux scenario, the value will be updtaed eventually with a delay. However, in active-active dual-tor scenario, there is no other mechanism to initialize the value and get state machines started. So this script will have to write something at start up time. For active-active dualtor, 'active' is a more preferred initial value, the state machine will switch the state to standby soon if link prober found link not in good state. How I did it Update the script to always provide initial values. How to verify it Tested on active-active dual-tor testbed. Signed-off-by: Ying Xie ying.xie@microsoft.com
qiluo-msft
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Sep 1, 2022
Why I did it The initial value has to be present for the state machines to work. In active-standby dual-tor scenario, or any hardware mux scenario, the value will be updtaed eventually with a delay. However, in active-active dual-tor scenario, there is no other mechanism to initialize the value and get state machines started. So this script will have to write something at start up time. For active-active dualtor, 'active' is a more preferred initial value, the state machine will switch the state to standby soon if link prober found link not in good state. How I did it Update the script to always provide initial values. How to verify it Tested on active-active dual-tor testbed. Signed-off-by: Ying Xie ying.xie@microsoft.com
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Why I did it
The initial value has to be present for the state machines to work. In active-standby dual-tor scenario, or any hardware mux scenario, the value will be updtaed eventually with a delay.
However, in active-active dual-tor scenario, there is no other mechanism to initialize the value and get state machines started.
So this script will have to write something at start up time.
For active-active dualtor, 'active' is a more preferred initial value, the state machine will switch the state to standby soon if
link prober found link not in good state.
How I did it
Update the script to always provide initial values.
How to verify it
Tested on active-active dual-tor testbed.
Signed-off-by: Ying Xie ying.xie@microsoft.com