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Configuring OSPF Route Redistribution
This screen can be used to configure the OSPF Route Redistribution parameters. The
allowable values for each fields are displayed next to the field. If any invalid values are
entered, an alert message will be displayed with the list of all the valid values.
Configurable Data
Configured Source - This select box is a dynamic selector and would be populated by only those
Source Routes that have already been configured for redistribute by OSPF. However, the topmost
option in the select box would be "Create", and this allows the user to configure another, among the
Available Source Routes. The valid values are 'Static', 'Connected', 'RIP' ,'BGP' and 'Create'.
Available Source - This select box is a dynamic selector and would be populated by only those Source
Routes that have not previously been configured for redistribution by OSPF. This select box would
appear only if the user selects "Create" option as Configured Source. The valid values are 'Static',
'Connected', 'RIP' and 'BGP'.
Metric- Sets the metric value to be used as the metric of redistributed routes. This field displays the
metric if the source was pre-configured and can be modified. The valid values are (0 to 16777215)
Metric Type - Sets the OSPF metric type of redistributed routes.
Tag - Sets the tag field in routes redistributed. This field displays the tag if the source was
pre-configured, otherwise 0 and can be modified. The valid values are 0 to 4294967295.
Subnets - Sets whether the subnetted routes should be redistributed or not.
Distribute List - Sets the Access List that filters the routes to be redistributed by the destination
protocol. Only permitted routes are redistributed. If this command refers to a non-existent access list, all
routes are permitted. The valid values for Access List IDs are (1 to 199). When used for route filtering,
the only fields in an access list that get used are
Source IP Address and netmask
Destination IP Address and netmask
Action (permit or deny)
All other fields (source and destination port, precedence, tos, etc.) are ignored.
The source IP address is compared to the destination IP address of the route. The source IP netmask
in the access list rule is treated as a wildcard mask, indicating which bits in the source IP address must
match the destination address of the route. (Note that a 1 in the mask indicates a "don’t care" in the
corresponding address bit.)
When an access list rule includes a destination IP address and netmask (an extended access list), the
destination IP address is compared to the network mask of the destination of the route. The destination
netmask in the access list serves as a wildcard mask, indicating which bits in the route’s destination
mask are significant for the filtering operation.
Command Buttons
Submit - Send the updated configuration to the router. Configuration changes take effect immediately.
Delete - Delete the entry of the Source Route selected as Configured Source from the list of Sources
configured for OSPF Route Redistribution.