What are two reasons that will prevent two neighbor routers from forming an OSPFv2 adjacency?
There may be several reasons why two routers running OSPF will fail to form an OSPF adjacency, including these: The subnet masks do not match, causing the routers to be on separate networks. OSPF Hello or Dead Timers do not match. OSPF network types do not match.
Which three requirements are necessary for two OSPFv2 routers to form an adjacency?
Which three requirements are necessary for two OSPFv2 routers to form an adjacency? (Choose three.) The OSPF hello or dead timers on each router must match. The link interface subnet masks must match. The OSPFv2 process ID must be the same on each router.
What values must match between two Neighbouring routers to form an OSPF adjacency?
OSPF Adjacency Requirements, The devices must be in the same area. The devices must have the same authentication configuration. The devices must be on the same subnet. The devices hello and dead intervals must match.
What are the factors that affect the establishment of a neighbor relationship by OSPF?
Gotcha’s With OSPF Neighborship OSPF must be enabled on the interfaces on each router that are connected to the same layer 2 network (w/ the network command). The neighboring primary IP addresses and masks must be in the same subnet. Authentication must pass. Interfaces must be in the same area. Areas must have the same area type (stubby, NSSA, etc)
What is a purpose of the OSPFv3 Type 8 and Type 9 LSAs?
LSA Type 8: Link LSA. Link Local scope: LSA is only flooded on the local link and is further used for the LINK- LSA. LSA Type 9: Intra-Area LSA. Area Scope: LSA is only flooded throughout a single OSPF area.
Which router is elected as the DR?
Two rules are used to elect a DR and BDR: router with the highest OSPF priority will become a DR. By default, all routers have a priority of 1. if there is a tie, a router with the highest router ID wins the election.
What are three characteristics of VTP?
What are three characteristics of VTP? (Choose three.) In the default VTP mode, VLANs can be created and modified on a switch. Switches in VTP server mode store VLANs in the vlan. VTP-enabled switches exchange three types of advertisements: summary routes, subnet advertisements, and advertisement requests from transparent bridges.
What are two requirements to be able to configure an EtherChannel between two switches?
What is a requirement to configure a trunking EtherChannel between two switches? The participating interfaces must be assigned the same VLAN number on both switches. The participating interfaces must be physically contiguous on a switch. The participating interfaces must be on the same module on a switch.
Which technological factor determines the impact of a failure domain?
70 Cards in this Set
|The ” backbone ” area interconnects with all other OSPF area types.||backbone|
|Which technological factor determines the impact of a failure domain?||the role of the malfunctioning device*|
Do OSPF neighbors have to be directly connected?
OSPF is another inter-AS dynamic routing protocol. Since an autonomous system is formed by a connected set of routers it is true that routers that participate in EIGRP or OSPF are always connected. Neighbors are the routers that are directly accessible through directly connected interfaces.
How do I know if OSPF is working?
To display general information about Open Shortest Path First ( OSPF ) routing instances, use the show ip ospf command. Use the show ip ospf command to display information about one or more OSPF instances.
What are two reasons for creating an OSPF network with multiple areas choose two?
1. What are two reasons for creating an OSPF network with multiple areas? ( Choose two.) to reduce SPF calculations* to reduce use of memory and processor resources* the use of multiple areas * Type 3 LSAs are generated without requiring a full SPF calculation.* Type 3 LSAs are used to update routes between OSPF areas.*
What could be reason for OSPF neighbors being stuck in 2 way?
Problem: OSPF Neighbor Stuck in 2-WAY ‚ Cause: Priority 0 Is Configured on All Routers. It is normal in broadcast media to have a 2-WAY state because not every router becomes adjacent on broadcast media. If all priorities are kept to the default, the router with the highest router ID becomes the DR.
Why do OSPF routers maintain neighbor adjacencies?
Establish neighbor adjacencies: OSPF -enabled routers must form adjacencies with their neighbor before they can share information with that neighbor. An OSPF -enabled router sends Hello packets out all OSPF -enabled interfaces to determine whether neighbors are present on those links.
Which two IP addresses does OSPF use for updates?
OSPF uses two IP multicast addresses on broadcast and point-to-point networks: 225.0. 0.5 for all OSPF routers and 224.0.