Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 112

JUNOSe 11.1.x BGP and MPLS Configuration Guide
route-map
set as-path prepend
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Configuring BGP Routing Policy
results of the new policy, you must use the clear ip bgp peer-group command
to perform a hard clear or outbound soft clear of the peer group. You cannot
merely perform a hard clear or outbound soft clear for individual peer group
members because that causes BGP to resend only the contents of the Adj-RIBs-Out
table.
Example
host1(config)#rneighbor 192.168.5.34 route-map nyc1 in
Use the no version to remove the route map.
See neighbor route-map.
Use to define the conditions for redistributing routes from one routing protocol
into another, and for filtering or modifying updates sent to or received from
peers.
Each route-map command has a list of match and set commands associated
with it.
The match commands specify the match criteria the conditions under which
redistribution is allowed for the current route map.
The set commands specify the set actions the redistribution actions to perform
if the criteria enforced by the match commands are set.
Use route maps when you wish to have detailed control over how routes are
redistributed between routing processes.
The destination routing protocol is the one you specify with the router command.
The source routing protocol is the one you specify with the redistribute command.
A clause with multiple values matches a route having any of the values; that is,
the multiple values are logical ORed.
If you specify a BGP peer group by using the peerGroupName argument, all the
members of the peer group inherit the characteristic configured with this
command unless it is overridden for a specific peer.
Example
host1(config)#route-map nyc1 permit 10
Use the no version to delete the route map.
See route-map.
Use to modify an AS path for BGP routes by prepending one or more AS numbers
or a list of AS numbers to the path list.
The only global BGP metric available to influence the best-path selection is the
AS-path length. By varying the length of the AS path, a BGP speaker can influence
the best-path selection by a peer farther away.
Example