Table of Contents
What is the passive-interface in OSPF?
A passive interface is one for which the address information is advertised as an internal route in OSPF, but on which the protocol does not run. To configure an interface in OSPF passive traffic engineering mode, include the traffic-engineering statement.
What does the network command do in OSPF?
The network command is used to identify which device interface will be included within the OSPF process and to what area the interface will be assigned to. The correct usage of the network command is vital for the operation of the OSPF network.
What is passive-interface RIP?
Router(config-router)#passive-interface serial0/0/0. Sets the interface as passive, meaning that routing updates will not be sent out this interface. NOTE: For RIP, the passive-inter-face command will prevent the inter-face from sending out routing updates but will allow the interface to receive updates.
How do I set a default route in OSPF?
To generate a default route, you use the default-information originate command. This command presents two options: You can advertise 0.0. 0.0 into the OSPF domain, provided the advertising router already has a default route.
Which two commands are required for basic OSPF configuration?
14. Which two commands are required for basic OSPF configuration? Explanation: The “Router ospf [process-id]” command enables OSPF routing protocol in the router and the “[Wildcard-mask] area [area-id]” command is used to select the interfaces that we want to include in the OSPF process.
What does no passive-interface mean OSPF?
So,”no passive-interface vlan2″ means that the OSPF peering is over vlan 2 with the neighboring router. more info: In Open Shortest Path First (OSPF), hello packets are not sent on an interface that is specified as passive.
What is passive-interface of router?
–> Passive Interface is a feature used by routing protocol to stop sending updates on the particular interface. –> Basically this command is applied on the router interface which is connected to LAN or Loopback. –> Routing updates are only understood by the routers.
Is passive an interface?
Passive mode means that the interface is advertised into the link-state protocol, but the interface does not send or receive protocol control packets, such as IS-IS hello and link-state PDUs.
Why would you disable OSPF on an interface?
To enhance OSPF adaptability and reduce resource consumption, you can set an OSPF interface to “silent.” A silent OSPF interface blocks OSPF packets and cannot establish any OSPF neighbor relationship. However, other interfaces on the router can still advertise direct routes of the interface in Router LSAs.
What is a passive OSPF interface?
OSPF Passive Interface. When you use the network command in OSPF, two things will happen: All interfaces that have a network that falls within the range of the network command will be advertised in OSPF. OSPF hello packets are sent on these interfaces. Sometimes it’s undesirable to send OSPF hello packets on certain interfaces.
What happens when I use the network command in OSPF?
When you use the network command in OSPF, two things will happen: All interfaces that have a network that falls within the range of the network command will be advertised in OSPF. OSPF hello packets are sent on these interfaces.
How to prevent OSPF hello packets on certain interfaces?
If someone on the computer starts an application that replies with OSPF hello packets then R1 will try to become neighbors. An attacker could advertise fake routes using this technique. To prevent this from happening, we can use the passive-interface command. This command tells OSPF not to send hello packets on certain interfaces.
How to start OSPF process in ospfddoes?
To start OSPF process you have to specify the OSPF router. As of this writing, ospfddoes not support multiple OSPF processes. Command: router ospf Command: no router ospf Enable or disable the OSPF process. ospfddoes not yet support multiple OSPF processes. So you can not specify an OSPF process number. OSPF Command: ospf router-id a.b.c.d