global-threshold and global-weight of ip-monitoring

[caiyu]

i am confused about these 2 parameter: global-threshold and global-weight. what is the relationship between them?

if my configuration is like this, how these 2 parameters takes effect when remote ip unreachable?

here is my understanding: if 192.168.1.2 unreachable, it will trigger global-threshold 255 - 192.168.1.2 weight 255 = 0. Then failover will happen. but what is global-weight? it seems that it has no relationship with failover.

chassis {
    cluster {
        control-link-recovery;
        reth-count 2;
        redundancy-group 0 {
            node 0 priority 200;
            node 1 priority 100;
        }
        redundancy-group 1 {
            node 0 priority 200;
            node 1 priority 100;
            preempt;
            gratuitous-arp-count 4;
            hold-down-interval 90;
  ip-monitoring {
   global-weight 200;
   global-threshold 255;
   family {
   inet {
    192.168.1.2 weight 255;

[aweck]

In the config snipit above, global threshold determines how many monitored IPs (depending on individual weight) need to failover before before the global weight is deducted from the RG's priority.

[caiyu]

Hi Aweck,

thanks for your reply.

please correct if this understanding is wrong.

When IP: 192.168.1.2 is undetectable, RG1 threshold = global-threshold (255) - weight (255)= 0.  When RG1 threshold = 0, this cause RG1 node0 priority = node 0 priority (200) - global-weight (200) =0.  Since node0 RG1 priority is lower than node1, this cause RG1 cluster to failover from node0 to node1.

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aweck wrote:

In the config snipit above, global threshold determines how many monitored IPs (depending on individual weight) need to failover before before the global weight is deducted from the RG's priority.

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[aweck · Accepted solution]

That's it.

[h3cisco]

no no ,RG1 priority is not  node 0 priority (200) - global-weight (200) , It is from RG initially threshold 255 - global-weight=55 ,but RG priority is 55 will don't trigger failover , the RG priority must be reaches 0 , then the failover will take place.

So you need change the global-weight to 255 .

The attachment is the screenshot from 11.4 CG abouth IP-monitoring.

Hope it could help you .