Configuring The Route Preference Of A Router - Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual

Configuring IP

Configuring the Route Preference of a Router

By default, the route preference of a router is in this order: local, static, OSPF, RIP, EBGP, and IBGP
(highest to lowest).
Use the ip route-pref
configure the route preference of an OSPF route, you must enter:
-> ip route-pref ospf 15
To display the current route preference configuration, use the
-> show ip route-pref
Protocol
------------+------------------------
Local
Static
OSPF
RIP
EBGP
IBGP
Configuring the Time-to-Live (TTL) Value
The TTL value is the default value inserted into the TTL field of the IP header of datagrams originating
from the switch whenever a TTL value is not supplied by the transport layer protocol. The value is
measured in hops.
Use the ip default-ttl
example, to set a TTL value of 75, you would enter:
-> ip default-ttl 75
The default hop count is 64. The valid range is 1 to 255. Use the
default TTL value.
Configuring Route Map Redistribution
You can learn and advertise IPv4 routes between different protocols. Such a process is referred to as route
redistribution and is configured using the
Redistribution uses route maps to control how external routes are learned and distributed. A route map
consists of one or more user-defined statements that can determine which routes are allowed or denied
access to the receiving network. In addition, a route map can also contain statements that modify route
parameters before they are redistributed.
When a route map is created, a name is given to identify the group of statements that it represents. This
name is required by the ip redist command. Therefore, configuring route redistribution involves the
following steps:
1
Create a route map, as described in
2
Configure redistribution to apply a route map, as described in
on page 15-24.
OmniSwitch AOS Release 8 Network Configuration Guide
command to change the route preference value of a router. For example, to
Route Preference Value
1
2
110
120
190
200
command to set the TTL value. Enter the command, followed by the TTL value. For
ip redist
"Using Route Maps" on page
show ip route-pref
show ip config
command.
15-21.
"Configuring Route Map Redistribution"
December 2017
IP Configuration
command:
command to display the
page 15-20