Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 226)

198 Multi-Service IronWare Routing Configuration Guide
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Adding additional parameters
NOTE
If you specify a metric and metric type, the values you specify are used even if you do not use the
always option.
The route-map parameter overrides other options. If set commands for metric and metric-type are
specified in the route-map, the command-line values of metric and metric-type if specified, are
ignored for clarification.
The route-map rmap parameter specifies the route map reference.
The corresponding route-map should be created before configuring the route-map option along
with the default-information-originate. If the corresponding route-map was not been created
beforehand, then the an error message will be displayed stating that the route-map must be
created.
OSPF distribute list
This feature of Multi-Service IronWare configures a distribution list to explicitly deny specific routes
from being eligible for installation in the IP route table. By default, all OSPF routes in the OSPF route
table are eligible for installation in the IP route table. This feature does not block receipt of LSAs for
the denied routes. The Layer 3 Switch still receives the routes and installs them in the OSPF
database. The feature only prevents the software from installing the denied OSPF routes into the IP
route table.
The OSPF distribution list can be managed using ACLs or Route Maps to identify routes to be
denied as described in the following sections:
• Configuring an OSPF Distribution List using ACLs
• Configuring an OSPF Distribution List using Route Maps
Configuring an OSPF distribution list using ACLs
To configure an OSPF distribution list using ACLs:
• Configure an ACL that identifies the routes you want to deny. Using a standard ACL lets you
deny routes based on the destination network, but does not filter based on the network mask.
To also filter based on the destination network's network mask, use an extended ACL.
• Configure an OSPF distribution list that uses the ACL as input
Examples
In the following example, the first three commands configure a standard ACL that denies routes to
any 10.x.x.x destination network and allows all other routes for eligibility to be installed in the IP
route table. The last three commands change the CLI to the OSPF configuration level and configure
an OSPF distribution list that uses the ACL as input. The distribution list prevents routes to any
10.x.x.x destination network from entering the IP route table. The distribution list does not prevent
the routes from entering the OSPF database.
Brocade(config)# ip access-list standard no_ip
Brocade(config-std-nacl)# deny 10.0.0.0 0.255.255.255
Brocade(config-std-nacl)# permit any
Brocade(config)# router ospf
Brocade(config-ospf-router) # area 0
Brocade(config-ospf-router) # distribute-list no_ip in