S Commands
This chapter describes the Cisco NX-OS Open Shortest Path First (OSPF) commands that begin with S.
set forwarding-address
To set the Open Shortest Path First (OSPF) forwarding address for redistributed type-5 Link State Advertisements (LSAs), use the set forwarding-address command. To remove the address, use the no form of this command.
set forwarding-address
no forwarding-address
Syntax Description
This command has no arguments or keywords.
Command Default
No forwarding address is set as a default.
Command Modes
Command HistoryRoute-map configuration mode
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5.0(3)N1(1) |
This command was introduced. |
Usage Guidelines
This command is used by the OSPF to set the forwarding address for the redistributed type-5 LSAs. The value of the forwarding address specified by the autonomous system boundary router (ASBR) can be either 0.0.0.0 or nonzero. The 0.0.0.0 address indicates that the originating router (the ASBR) is the next hop.
If the ASBR redistributes routes and OSPF is not enabled on the next hop interface for those routes, the forwarding address is set to 0.0.0.0 .
All of the following conditions must be met to set the forwarding address field to a nonzero address:
•
OSPF is enabled on the ASBR's next hop interface.
•ASBR's next hop interface is non-passive under OSPF.
•ASBR's next hop interface is not point-to-point.
•ASBR's next hop interface is not point-to-multipoint.
For all other conditions, set the forwarding address to 0.0.0.0.
Examples
This example shows how to set the forwarding address:
switch(config)# route-map test1 10 permit
switch(config-route-map)# set forwarding-address
Related Commands
shutdown (OSPF)
To stop an Open Shortest Path First (OSPF) instance without removing the configuration, use the shutdown command. To start a stopped OSPF instance, use the no form of this command.
shutdown
no shutdown
Syntax Description
This command has no arguments or keywords.
Command Default
No process is stopped.
Command Modes
Command HistoryRouter configuration mode
VRF configuration mode
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5.0(3)N1(1) |
This command was introduced. |
Usage Guidelines
Entering the shutdown command stops a router process but does not remove any configuration parameters. The shutdown command is displayed in the running configuration file when enabled.
This command requires the LAN Base Services license.
Examples
This example shows how to stop an active OSPF instance:
switch(config)# router ospf firstcompany
switch(config-router)# shutdown
Related Commands
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feature ospf |
Enables OSPF on the router. |
router ospf |
Configures an OSPF instance. |
summary-address (OSPF)
To create aggregate addresses for the Open Shortest Path First (OSPF) protocol, use the summary-address command. To return to the default, use the no form of this command.
summary-address ip-prefix/length [not-advertise] [tag tag]
no summary-address ip-prefix/length [not-advertise] [tag tag]
Syntax Description
Command Default
None
Command Modes
Command HistoryRouter configuration mode
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5.0(3)N1(1) |
This command was introduced. |
Usage Guidelines
Use the summary-address command to create an aggregate address to replace a series of more-specific addresses. The metric used to advertise the summary is the smallest metric of all the more specific routes.
Use this command to help reduce the size of the routing table and allow an OSPF Autonomous System Boundary Router (ASBR) to advertise one external route as an aggregate for all redistributed routes that are covered by the address.
This command requires the LAN Base Services license.
Examples
This example shows how to configure the summary address 192.0.0.0 to include address 192.0.1.0, 192.0.2.0, 192.0.3.0, and so on. Only the address 192.0.0.0 is advertised in an external link-state advertisement.
switch(config)# router ospf 201
switch(config-router)# summary-address 192.0.0.0/16
Related Commands
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