Juniper JUNOSE, Configuration Manual

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The no command disables inbound soft-reconfiguration for peer 10.19.7.8, overriding
the configuration of the peer group to which the peer 10.19.7.8 belongs. The
configuration of an individual peer takes precedence over the configuration of the
peer group to which the peer belongs.
host1(config-router)# default neighbor 10.19.7.8 soft-reconfiguration inbound
The default version returns the peer to inheriting the peer group configuration.
Because inbound soft-reconfiguration is still enabled for lisbon, it is now also enabled
for peer 10.19.7.8.
host1(config-router)# default neighbor lisbon soft-reconfiguration inbound
Finally, this last command returns the peer group configuration to the default value,
disabling inbound soft-reconfiguration. The peer 10.19.7.8 inherits this value.
Example 2
For category C and D commands, the behavior of the no version of the command
is the same as the behavior of the default version of the command. The following
example illustrates this behavior and the inheritance concept for the neighbor timers
command.
By default, the BGP global keepalive timer is 30 seconds and the global hold-time
timer is 90 seconds.
host1(config-router)# neighbor eastcoast peer-group
host1(config-router)# neighbor 10.10.21.23 peer-group eastcoast
Peer group eastcoast and peer 10.10.21.23 both have the default timer values. The
peer group inherits the global timer values; the peer is a member of eastcoast and
inherits the timer values from the peer group.
host1(config-router)# neighbor eastcoast timers 15 40
Now peer group eastcoast has a keepalive timer of 15 seconds and a hold-time timer
of 40 seconds. Peer 10.10.21.23 inherits these values from the peer group.
host1(config-router)# no neighbor 10.10.21.23 timers
Now peer 10.10.21.23 has its timers reset to the global values of 30 and 90 seconds.
The configuration of an individual peer takes precedence over the configuration of
the peer group to which the peer belongs, which in turn takes precedence over the
global configuration.
host1(config-router)# default neighbor 10.10.21.23 timers
Nothing changes. For commands in categories C and D, the behavior of the default
version is the same as the no version. Peer 10.10.21.23 still has the global timer
values.
host1(config-router)# neighbor eastcoast timers 20 20
The eastcoast peer group now has timer values of 20 seconds. Peer 10.10.21.23 still
has the global timer values.
Basic Configuration
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Chapter 1: Configuring BGP Routing