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JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
ip split-horizon
ip summary-address
match-set summary prefix-tree
maximum-paths
218
Configuration Tasks
Use to configure the split horizon feature and poison reverse features for the
interface. Enabled by default, split horizon prevents the RIP router from
advertising routes from the originating interface.
Poison reverse routing updates are disabled by default; when enabled, they set
the metric for routes originating on the interface to infinity, thus explicitly
advertising that the network is not reachable. This helps to prevent routing loops.
In most configurations, you will want to accept the default condition.
Example
host1(config-if)#no ip split-horizon
Use the no version to disable split horizon and enable poison reverse routing
updates.
See ip split-horizon
Use to specify an IP address and network mask to identify which routes to
summarize.
You can optionally specify a metric associated with the summary address. The
default metric is 1.
Example
host1(config-router)#ip summary-address 4.4.0.0 255.255.0.0 5
host1(config-router)#ip summary-address 4.3.0.0 255.255.0.0 6
Use the no version to stop summarization for the specified routes.
See ip summary-address
Use to specify a prefix tree that summarizes routes for a particular route map.
Use the ip prefix-tree command to set the conditions of the prefix tree, including
which routes to summarize and how many bits of the network address to
preserve.
Example
host1(config-route-map)#match-set summary prefix-tree boston
Use the no version to disable the use of the prefix tree by the route map.
See match-set summary prefix-tree
Use to control the maximum number of parallel routes that RIP can support.
RIP installs multiple equal-cost paths to a given destination only if each has a
different next hop.
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