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DES-7200 Configuration Guide Chapter 1 Protocol-Independent
Configuration
1-13
1.4.2.3 Reuse Threshold
When the interface stops flapping and the penalty decreases to a certain degree
(below the suppress threshold), the interface is considered having recovered to
stable state and the interface is hence unsuppressed.
1.4.2.4 Maximum Suppress Time
To avoid that a long-flapping interface cannot be reused due to excessive penalty,
the algorithm also defines a maximum suppress time. No matter how long the
interface will flap, the duration of interface dampening will exceed this maximum
suppress time.
1.4.3 Components Affected
When a layer-3 interface is not configured with dampening, or when an interface
is configured with dampening but is not suppressed, the behavior of routing
protocol or other layer-3 interface state related protocols will be the same as in
normal situations. When an interface is configured with dampening and is
suppressed, the upper layer protocol will consider the interface state as down; the
routing tables and upper layer routing protocols are immune to any further state
transitions of the interface until it is unsuppressed.
Caution
Dampening feature is currently not supported by the sub-interface and interface
templates on router products.
1.4.4 Protocol Specification
This is no matching specification, but the suppression algorithm used by this
feature is the same as the BGP route flap suppression algorithm described in
RFC2439.
1.4.5 Configure Dampening Parameters
Configure as per the following steps:
Command Function
DES-7200>enable
Enter privilege mode
DES-7200# configure terminal
Enter global configuration mode