What is ID number on router?

The router identifier usually is the IP address of the local routing device. If you do not configure a router identifier, the IP address of the first interface to come online is used. This is usually the loopback interface. Otherwise, the first hardware interface with an IP address is used.

What is the procedure to select the router ID in OSPF?

If there is no OSPF Router ID configured, the highest IP address on any of the Routers Loopback Interfaces is selected as the OSPF Router ID. If there is no Loopback Interfaces configured, the highest IP address on its active interfaces is selected as the OSPF Router ID.

How is DR and BDR elected?

Routers in a broadcast or NBMA network elect the DR and BDR by router priority and ID. Routers with a router priority value higher than 0 are candidates for DR and BDR election. The election votes are hello packets. Each router sends the DR elected by itself in a hello packet to all the other routers.

Which criteria is preferred by the router to choose a router ID?

Explanation: The preferred order of criteria for Cisco routers to identify the router ID is: an explicitly configured router using the router-id rid command; the IP address of any configured loopback interface; and the IP address of any active interface on the router (it does not have to be an OSPF-enabled interface).

Which is elected first DR or BDR?

If no router is a DR or a BDR on a given subnet, the BDR is first elected, and then a second election is held for the DR. What are the criteria for the DR election process? The DR is elected based on the following default criteria: If the priority setting on an OSPF router is set to 0, it can never become a DR or BDR.

How is Dr chosen?

The election votes are hello packets. Each router sends the DR elected by itself in a hello packet to all the other routers. If two routers on the network declare themselves as the DR, the router with the higher router priority wins. If router priorities are the same, the router with the higher router ID wins.

Which of the following is the order of precedence for choosing the router ID?

The preferred order of criteria for Cisco routers to identify the router ID is: an explicitly configured router using the router-id rid command; the IP address of any configured loopback interface; and the IP address of any active interface on the router (it does not have to be an OSPF-enabled interface).

What is the highest OSPF priority?

The OSPFv2 router assigned the highest priority becomes the designated router, and the OSPFv2 router with the second-highest priority becomes the backup router. If you set the priority to 0, the device does not participate in DR and BDR election. The no form of the command restores the default value.

When electing the DR and DBR a router with the?

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. The router with the second highest OSPF priority or router ID will become a BDR.

How DR and BDR is chosen?

How OSPF DR is selected?

OSPF DR BDR ELECTION

1. Router with the highest OSPF priority will become a DR. Router with the second highest OSPF priority or router ID will become a BDR (By default, all routers have a priority of 1)
2. In case of a tie, Router with the highest router ID wins the election.