Nicely which was a feature i didnt recognize in any respect! And so in accordance with cisco file
"Interface condition alterations arise whenever interfaces usually are administratively brought up or maybe decrease or maybe if a great user interface alterations condition. As soon as a great user interface alterations condition or maybe flaps, course-plotting standards usually are alerted on the reputation on the avenues that will are influenced by the particular change throughout condition. Each user interface condition change needs just about all impacted equipment inside the network to help recalculate finest paths, put in or maybe get rid of avenues from the course-plotting dining tables, then publicise legitimate avenues to help peer routers. A good shaky user interface that will flaps excessively might cause some other equipment inside the network to eat considerable degrees of system running means and also bring about course-plotting standards to forfeit synchronization with the condition on the flapping user interface. inches
http: //www. cisco. com/en/US/docs/ios/12_0s/feature/guide/s_ipevdp. html#wp1027129
Ip celebration dampening we can configure timers that will dampen the particular user interface so getting rid of the idea from the course-plotting process until the user interface is usually dependable once again.
These kind of timers usually are:
Restrain tolerance -- As soon as a great int goes up and down it's given a penalty value, the ideal penalty charges make fish an int is usually permitted to subject to is usually that timer, once the value is usually arrived at user interface is defined throughout dampen condition
50 percent time period -- whenever a great user interface halts flapping the particular penalty is usually reduced through fifty percent after each and every period of time of this value is usually put together.
Recycle tolerance -- once the option is just about to become disseminated once again inside the network is usually allowed as long as the particular reuse tolerance remains a confident value. Beliefs cover anything from 1 to help 20k, default is usually 1000
Maximum restrain time -- This is actually the utmost period of time a great user interface can certainly stay dampened
This illustration configures user interface dampening on Ethernet user interface 0/1 and also pieces the particular fifty percent lifestyle to help 40 moments, the particular reuse tolerance to help 2000, the particular restrain tolerance to help 15000; and the utmost restrain time and energy to 100 moments:
user interface Ethernet 0/1
dampening 40 1000 10000 100
R4#show interfaces ethernet 0/1 dampening
Ethernet0/1
Flaps Charge Supp ReuseTm HalfL ReuseV SuppV MaxSTm MaxP Reboot
0 0 BOGUS 0 40 1000 10000 100 10078 0
R4#
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