📖 What is OSPF Interface Priority?
A value between 0 and 255 assigned to an OSPF interface that determines its eligibility to become a DR or BDR.
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Sensei Says:
"The default priority is 1. An interface with a priority of 0 will NEVER become a DR or BDR. If priorities are tied, the highest Router ID wins the election."
📚 Certification: Certified Network Associate (200-301)
🔑 What are the Key Concepts of OSPF Interface Priority?
- ▸ 0-255 value range
- ▸ DR/BDR election influence
- ▸ Priority 0 means non-participant
🎯 How does OSPF Interface Priority appear on the 200-301 Exam?
Configuring an interface with priority 0 so a low-end branch router never becomes the DR.
Setting priority to 255 to ensure a core router wins the DR election.
❓ Frequently Asked Questions
What happens if two routers have the same OSPF priority?
The router with the higher OSPF Router ID wins the election.
Can you change the priority to force an immediate DR change?
No, OSPF elections are non-preemptive. You must restart the OSPF process for the new priority to take effect.