Brocade BigIron RX Series Configuration Guide - Manual (Page 859)

BigIron RX Series Configuration Guide 781
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Configuring OSPF
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• set tag <tag-value>
NOTE
You must configure the route map before you configure a redistribution that uses the route map.
NOTE
When you use a route map for route redistribution, the software disregards the permit or deny action
of the route map.
NOTE
For an external route that is redistributed into OSPF through a route map, the metric value of the
route remains the same unless the metric is set by a set metric command inside the route map. The
default-metric <num> command has no effect on the route. This behavior is different from a route
that is redistributed without using a route map. For a route redistributed without using a route map,
the metric is set by the default-metric <num> command.
Disable or re-enable load sharing
The device can load share among up to eight equal-cost IP routes to a destination. By default, IP
load sharing is enabled. The default is 4 equal-cost paths but you can specify from 2 – 8 paths.
The router software can use the route information it learns through OSPF to determine the paths
and costs.
Figure 118 shows an example of an OSPF network containing multiple paths to a
destination (in this case, R1).
FIGURE 118 Example OSPF network with four equal-cost paths
In the example in Figure 118 , the BigIron RX has four paths to R1:
• BigIron RX ->R3
• BigIron RX ->R4
• BigIron RX ->R5
OSPF Area 0
H1
H2
H3
H4
R1
R3
R4
R5
R6
BigIron RX