Disabling Split Horizon; Tuning Eigrp - Cisco Nexus 3000 Series Configuration Manual
Nx-os unicast routing configuration guide,
nx-os release 5.0(3)u1(1)
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Also See for Nexus 3000 Series:
- Command reference manual (356 pages) ,
- Configuration manual (182 pages) ,
- Installation manual (112 pages)
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Chapter 4
Configuring EIGRP
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
Disabling Split Horizon
You can use split horizon to block route information from being advertised by a router out of any
interface from which that information originated. Split horizon usually optimizes communications
among multiple routing switches, particularly when links are broken.
By default, split horizon is enabled on all interfaces.
To disable split horizon, use the following command in interface configuration mode:
Command
switch(config-if)# no ip split-horizon eigrp
instance-tag
Example:
switch(config-if)# no ip split-horizon eigrp
Test1
Tuning EIGRP
You can configure optional parameters to tune EIGRP for your network.
You can configure the following optional parameters in address-family configuration mode:
Command
default-information originate [always |
route-map map-name ]
Example:
switch(config-router-af)#
default-information originate always
distance internal external
Example:
switch(config-router-af)# distance 25 100
metric maximum-hops hop-count
Example:
switch(config-router-af)# metric
maximum-hops 70
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
Configuring Advanced EIGRP
Purpose
Disables split horizon.
Purpose
Originates or accepts the default route with prefix
0.0.0.0/0. When a route-map is supplied, the
default route is originated only when the route map
yields a true condition. The map name can be any
case-sensitive, alphanumeric string up to 20
characters.
Configures the administrative distance for this
EIGRP process. The range is from 1 to 255. The
internal value sets the distance for routes learned
from within the same autonomous system (the
default value is 90). The external value sets the
distance for routes learned from an external
autonomous system (the default value is 170).
Sets maximum allowed hops for an advertised
route. Routes over this maximum are advertised as
unreachable. The range is from 1 to 255. The
default is 100.
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