Policy Testing - Juniper JUNOSE SOFTWARE FOR E SERIES 11.0.X - BGP AND MPLS CONFIGURATION GUIDE 2009-12-30 Configuration Manual

set dampening

Policy Testing

You can analyze and check your BGP routing policies on your network before you
implement the policies. Use the test ip bgp neighbor and test bgp ipv6 neighbor
commands to test the outcome of a BGP policy. The commands output displays the
routes that are advertised or accepted if the specified policy is implemented.
NOTE: You can use the standard redirect operators to redirect the test output to
network or local files. See the section JUNOSe System Basics Configuration Guide.
BGP routes must be present in the forwarding table for these commands to work
properly. If you run the policy test on incoming routes, soft reconfiguration (configured
with the neighbor soft reconfiguration in command) must be in effect.
NOTE: The output of these commands is always speculative. It does not reflect the
current state of the router.
test bgp ipv6 neighbor
Routes previously suppressed by a route map that are unsuppressed by this
command are not automatically advertised; you must use the clear ip bgp
command to perform a hard clear or outbound soft clear.
Example
host1(config-router)#neighbor berlin5 unsuppress-map inmap3
Use the no version to restore the default values.
See neighbor unsuppress-map.
Use to enable BGP route flap dampening only on routes that pass the match
clauses of, and are redistributed by, a particular route map.
BGP creates a dampening parameter block for each unique set of dampening
parameters such as suppress threshold and reuse threshold used by BGP. For
example, if you have a route map that sets the dampening parameters to one
set of values for some routes and to another set of values for the remaining
routes, BGP uses and stores two dampening parameter blocks, one for each set.
Example
host1(config)#route-map nyc1 permit 10
host1(config-route-map)#set dampening 5 1000 1500 45 15
Use the no version to delete the set clause from a route map.
See set dampening.
Chapter 1: Configuring BGP Routing
Configuring BGP Routing Policy
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