21 nov. 2011

IP Event Dampening


IP Event Dampening
Suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network.

Works for
Connected routes
Static routes
RIP, OSPF, EIGRP, IS-IS, and BGP
HSRP

Enabling IP Event Dampening
enable
configure terminal
interface type number
dampening [half-life-period reuse-threshold] [suppress-threshold max-suppress [restart-penalty]]
end

Without arguments : default configuration parameters.

The following example configures interface dampening on Ethernet interface 0/0 and sets the half life to 30 seconds, the reuse threshold to 1500, the suppress threshold to 10000; and the maximum suppress time to 120 seconds:
interface Ethernet 0/0
 dampening 30 1500 10000 120

NTP - ACL

NTP - Network Time Protocol Packet types: -  Control messages : don't bother with this. -  NTP request/update messages: used for time sy...