Configuring A Passive Interface; Configuring Split Horizon With Poison Reverse; Configuring Route Summarization - Cisco Nexus 3000 Series Configuration Manual

Chapter 7 Configuring RIP
S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m

Configuring a Passive Interface

You can configure a RIP interface to receive routes but not send route updates by setting the interface to
passive mode.
To configure a RIP interface in passive mode, use the following command in interface configuration
mode:
Command
ip rip passive-interface
Example:
switch(config-if)# ip rip
passive-interface

Configuring Split Horizon with Poison Reverse

You can configure an interface to advertise routes learned by RIP as unreachable over the interface that
learned the routes by enabling poison reverse.
To configure split horizon with poison reverse on an interface, use the following command in interface
configuration mode:
Command
ip rip poison-reverse
Example:
switch(config-if)# ip rip poison-reverse

Configuring Route Summarization

You can create aggregate addresses that are represented in the routing table by a summary address. Cisco
NX-OS advertises the summary address metric that is the smallest metric of all the more-specific routes.
To configure a summary address on an interface, use the following command in interface configuration
mode:
Command
ip rip summary-address ip-prefix/mask-len
Example:
switch(config-if)# ip router rip
summary-address 192.0.2.0/24
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
Purpose
Sets the interface into passive mode.
Purpose
Enables split horizon with poison reverse. Split
horizon with poison reverse is disabled by default.
Purpose
Configures a summary address for RIP for IPv4
addresses.
Configuring RIP
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