D-Link DGS-6600-48TS Configuration Guide - Page 221
Specifying Passive Interfaces, Initiating OSPF Shutdown on a Specific VLAN Interface, Specifying
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Volume 4-Layer 3 Configurations / Chapter 23-Open Shortest Path First (OSPF) OSPF Configuration Commands Specifying Passive Interfaces An interface that is connected to a stub network that does not have any other routers inside can be specified as a passive interface. If the user specifies a passive interface, the OSPF process will neither send or receive OSPF messages on that interface. Use the following command to specify the interfaces that will not advertise OSPF routing updates: Command passive-interface INTERFACE-ID Explanation Specifies that the interface will not advertise OSPF routing updates. In the following example, the user specifies that VLAN interface 30 will not advertise OSPF routing updates: dgs-6600:2>enable dgs-6600:15#configure terminal dgs-6600:15(config)#router ospf dgs-6600:15(config-router)#passive-interface vlan30 dgs-6600:15(config-router)#end Initiating OSPF Shutdown on a Specific VLAN Interface The Switch allows a user to temporarily shutdown the OSPF protocol on a specific VLAN interface in a method that causes minimum disruption and informs neighboring routers that it will be unavailable. When this procedure is implemented, all traffic that has another path through the network will be directed down an alternate path. Use the following command to shutdown OSPF on a specific VLAN interface: Command ip ospf shutdown [INTERFACE-ID] Explanation Initiates an OSPF graceful shutdown on a VLAN interface. In the following example, the user initiates an OSPF protocol graceful shutdown on VLAN interface 5: dgs-6600:2>enable dgs-6600:15#configure terminal dgs-6600:15(config)#router ospf dgs-6600:15(config-router)#ip ospf shutdown vlan5 dgs-6600:15(config-router)#end Specifying the OSPF Cost on a VLAN Interface The interface cost reflects the overhead for sending a packet across an interface. The cost is inversely proportional to the speed of an interface. Thus, it is inversely proportional to the bandwidth of the link. The higher the bandwidth is, the less the cost is. The speed can be manually assigned or automatically calculated based on the bandwidth. The default referential bandwidth that has a cost value of 1 is 100Mbps. Based on this default referential bandwidth, the cost of an Ethernet interface will be 1. DGS-6600 Configuration Guide 221