Cisco 7604 Configuration Guide - Page 153

Redistributing Routes Between OSPF Processes

Page 153 highlights

Chapter 8 Configuring IP Routing and DHCP Services Configuring OSPF hostname(config-router)# network 10.0.0.0 255.0.0.0 area 0 Redistributing Routes Between OSPF Processes The FWSM can control the redistribution of routes between OSPF routing processes. The FWSM matches and changes routes according to settings in the redistribute command or by using a route map. See also the "Generating a Default Route" section on page 8-18 for another use for route maps. Note Note: The maximum number of route entries for all types of routes (connected, static and dynamic) supported by FWSM is 32768, or 32K. To redistribute static, connected, or OSPF routes from one process into another OSPF process, perform the following steps: Step 1 Step 2 Step 3 To create a route map, see the "Defining a Route Map" section on page 8-5. If you have not already done so, enter the router configuration mode for the OSPF process you want to redistribute into by entering the following command: hostname(config)# router ospf process_id To specify the routes you want to redistribute, enter the following command: hostname(config-router)# redistribute {ospf process_id [match {internal | external 1 | external 2}] | static | connect} [metric metric-value] [metric-type {type-1 | type-2}] [tag tag_value] [subnets] [route-map map_name] The ospf process_id, static, and connect keywords specify from where you want to redistribute routes. You can either use the options in this command to match and set route properties, or you can use a route map. The tag and subnets options do not have equivalents in the route-map command. If you use both a route map and options in the redistribute command, then they must match. OL-20748-01 The following example shows route redistribution from OSPF process 1 into OSPF process 2 by matching routes with a metric equal to 1. The FWSM redistributes these routes as external LSAs with a metric of 5, metric type of Type 1, and a tag equal to 1. hostname(config)# route-map 1-to-2 permit hostname(config-route-map)# match metric 1 hostname(config-route-map)# set metric 5 hostname(config-route-map)# set metric-type type-1 hostname(config-route-map)# set tag 1 hostname(config-route-map)# router ospf 2 hostname(config-router)# redistribute ospf 1 route-map 1-to-2 The following example shows the specified OSPF process routes being redistributed into OSPF process 109. The OSPF metric is remapped to 100. hostname(config)# router ospf 109 hostname(config-router)# redistribute ospf 108 metric 100 subnets The following example shows route redistribution where the link-state cost is specified as 5 and the metric type is set to external, indicating that it has lower priority than internal metrics. hostname(config)# router ospf 1 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 8-11

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8-11
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
Chapter 8
Configuring IP Routing and DHCP Services
Configuring OSPF
hostname(config-router)#
network 10.0.0.0 255.0.0.0 area 0
Redistributing Routes Between OSPF Processes
The FWSM can control the redistribution of routes between OSPF routing processes. The FWSM
matches and changes routes according to settings in the
redistribute
command or by using a route map.
See also the
“Generating a Default Route” section on page 8-18
for another use for route maps.
Note
Note: The maximum number of route entries for all types of routes (connected, static and dynamic)
supported by FWSM is 32768, or 32K.
To redistribute static, connected, or OSPF routes from one process into another OSPF process, perform
the following steps:
Step 1
To create a route map, see the
“Defining a Route Map” section on page 8-5
.
Step 2
If you have not already done so, enter the router configuration mode for the OSPF process you want to
redistribute into by entering the following command:
hostname(config)#
router ospf
process_id
Step 3
To specify the routes you want to redistribute, enter the following command:
hostname(config-router)#
redistribute
{
ospf
process_id
[
match
{
internal
|
external 1
|
external 2
}] |
static
|
connect
} [
metric
metric-value
]
[
metric-type
{
type-1
|
type-2
}] [
tag
tag_value
] [
subnets
] [
route-map
map_name
]
The
ospf
process_id
,
static
, and
connect
keywords specify from where you want to redistribute routes.
You can either use the options in this command to match and set route properties, or you can use a route
map. The
tag
and
subnets
options do not have equivalents in the
route-map
command. If you use both
a route map and options in the
redistribute
command, then they must match.
The following example shows route redistribution from OSPF process 1 into OSPF process 2 by
matching routes with a metric equal to 1. The FWSM redistributes these routes as external LSAs with a
metric of 5, metric type of Type 1, and a tag equal to 1.
hostname(config)#
route-map 1-to-2 permit
hostname(config-route-map)#
match metric 1
hostname(config-route-map)#
set metric 5
hostname(config-route-map)#
set metric-type type-1
hostname(config-route-map)#
set tag 1
hostname(config-route-map)#
router ospf 2
hostname(config-router)#
redistribute ospf 1 route-map 1-to-2
The following example shows the specified OSPF process routes being redistributed into OSPF
process 109. The OSPF metric is remapped to 100.
hostname(config)#
router ospf 109
hostname(config-router)#
redistribute ospf 108 metric 100 subnets
The following example shows route redistribution where the link-state cost is specified as 5 and the
metric type is set to external, indicating that it has lower priority than internal metrics.
hostname(config)#
router ospf 1