UMN:CLI
User Manual
V5824G
398
The V5824G is basically configured not to compare MED values of the path information
that exchanges between the Confederation Peers. But just in case, it can be configured to
compare MED values of the path information that exchanges between Confederation
Peers.
To compare MED values on the exchange of path information between Confederation
Peers, use the following command.
Command
Mode
Description
bgp
bestpath
med
confed
[
missing-as-worst
]
Router
Configures the router to consider the MED in choosing
a path from among the paths on the exchange of
information between confederation peers.
bgp bestpath med missing-as-
worst
[
confed
]
To ignore MED values of paths on the exchange of information between confederation
peers, use the following command.
Command
Mode
Description
no bgp bestpath med confed
[
missing-as-worst
]
Router
Ignores MEDs of paths on the exchange of their
information between confederation peers.
no bgp bestpath med missing-
as-worst
[
confed
]
If there are several equal paths, one of them has no MED value. Because this path is
considered as
“zero” without MED value, it will be chosen the best path. But the path
would be the worst one if it has no MED value after
missing-as-worst
is set.
After
missing-as-worst
parameter is configured in the system, the path will be
recognized as the worst path without MED value.
10.1.2.7
Graceful Restart
Graceful restart allows a router undergoing a restart to inform its adjacent neighbors and
peers of its condition. The restarting router requests a grace period from the neighbor or
peer, which can then cooperate with the restarting router. With a graceful restart, the
restarting router can still forward traffic during the restart period, and convergence in the
network is not disrupted. The restart is not visible to the rest of the network, and the
restarting router is not removed from the network topology.
The main benefits of graceful restart are uninterrupted packet forwarding and temporary
suppression of all routing protocol updates. Graceful restart thus allows a router to
exchange path information with the neighboring router.
To configure graceful restart specifically for BGP, use the following command.
Command
Mode
Description
bgp graceful-restart
Router
Sets to use graceful restart in BGP protocol.
no bgp graceful-restart
Disables the restart time value setting.
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