(Supporting ADX v03.1.00) Owner's manual

196 Brocade Virtual ADX Graphical User Interface Guide
53-1003242-01
Routes
12
BGP4 Plus Routing
Clicking the BGP 4 Plus button at the bottom of the Routing panel displays the routing information
for interfaces using the BGP 4 Plus protocol.
This tab contains a table listing all active BGP4 Plus routes with their associated values.
Status The route status, which can be one or more of the following:
• A – AGGREGATE.The route is an aggregate route for multiple networks.
• B – BEST. BGP4 has determined that this is the optimal route to the destination.
If the “b” is lowercase, the software was not able to install the route in the IP route
table.
• b – NOT-INSTALLED-BEST. The routes received from the neighbor are the best BGP4
routes to their destinations, but were not installed in the IP route table because the
device received better routes from other sources (such as OSPF, RIP, or static IP
routes).
• C – CONFED_EBGP. The route was learned from a neighbor in the same confederation
and AS, but in a different sub-AS within the confederation.
• D – DAMPED. This route has been dampened (by the route dampening feature), and is
currently unusable.
• H – HISTORY. Route dampening is configured for this route, and the route has a history
of flapping and is unreachable now.
• I – INTERNAL. The route was learned through BGP4.
• L – LOCAL. The route originated on this device.
• M – MULTIPATH. BGP4 load sharing is enabled and this route was selected as one of
the best ones to the destination. The best route among the multiple paths also is
marked with “B”.
If the “m” is lowercase, the software was not able to install the route in the IP route
table.
• S – SUPPRESSED. This route was suppressed during aggregation and thus is not
advertised to neighbors. This field appears only if you enter the route option.
AS Path The ASs through which routes with these attributes have passed. The local AS is shown in
parentheses.
NOTE: If long values are truncated in display, the tooltip for the path will show the full path.
TABLE 56 BGP4 Plus routes and associated values
Column Content
Prefix BGP4 Plus address of the route's destination.
Mask Mask for te BGP4 Plus address.
Next Hop IP address of the next-hop router for this path.
MED The value of the route’s MED attribute. If the route does not have a metric, this field is
blank.
Local Pref The degree of preference for this route relative to other routes in the local AS. When the
BGP4 algorithm compares routes on the basis of local preferences, the route with the
higher local preference is chosen. The preference can have a value from 0–4294967295.
Weight The value that this device associates with routes from a specific neighbor. For example, if
the device receives routes to the same destination from two BGP4 neighbors, the device
prefers the route from the neighbor with the larger weight.
TABLE 55 BGP4 routes and associated values (Continued)
Column Content