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Zorluk: KolayOSPFv2 Network Types and DR/BDR Selection

A network administrator configures an OSPFv2 interface on a Multiaccess Ethernet network with the command `ip ospf priority 0`. What is the impact of this configuration on the DR/BDR election process on that segment?

  1. The router interface is completely excluded from becoming either a Designated Router (DR) or Backup Designated Router (BDR).Cevap
  2. B
    The router interface will become the DR if it has a higher Router ID than all other routers on the multiaccess segment.
  3. C
    The router interface can only be elected as the Backup Designated Router (BDR) and cannot serve as the DR.
  4. D
    The router interface will immediately win the election because priority 0 is evaluated before numerical priorities 1 through 255.

Cevap

The router interface is completely excluded from becoming either a Designated Router (DR) or Backup Designated Router (BDR).
In OSPFv2 multiaccess networks, setting an interface's priority to 0 explicitly revokes its eligibility to participate in DR and BDR elections. The interface remains in the DROTHER state and forms adjacencies only with the elected DR and BDR.

Adım Adım Çözüm

1
Evaluate the function of OSPF interface priority values.
OSPF interface priority ranges from 0 to 255, where default priority is 1.
The priority value determines eligibility and preference during DR/BDR elections on broadcast multiaccess networks.
2
Analyze the specific behavior of priority 0.
Configuring `ip ospf priority 0` marks the interface as ineligible for DR/BDR roles.
A router with priority 0 will always transition directly to the DROTHER state upon adjacency establishment.

Anahtar Kavram

OSPF Interface Priority 0 and DR/BDR Ineligibility
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Konular

OSPFv2 Network Types and DR/BDR Selection

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