OSPF DR BDR

Created: Dec 25, 2018 17:35:00Latest reply: Dec 29, 2018 17:27:38 468 7 8 0

Router ID (RID): Indicates the IP address of the router. Election method: 1. Use the highest IP address of the loopback interface as the RID. 2. If no loopback address is configured, the highest IP address of all activated physical interfaces is used as the RID.

Broadcast multi-channel access: The broadcast network allows multiple devices to connect (or access) to the same network (that is, the broadcast nature of the network (Ethernet), indicating that the network supports simultaneous access of multiple devices), and sends a single data packet to all nodes on the network to provide the broadcast capability, for example, Ethernet. In OSPF, each broadcast multi-access network must select a DR and a BDR.

Non-broadcast multi-access (NBMA): Non-broadcast multiple networks are those such as frame relay and X. 25 and asynchronous transfer mode (ATM) This network allows multiple access, but does not have the ability to broadcast Ethernet. Therefore, to implement proper functions, the NBMA network requires special OSPF configuration and the neighbor relationship must be defined in detail.

Designated router (DR): When a router is connected to the same multi-access network, a designated router DR is required. The typical example is Ethernet LAN. To minimize the established adjacencies, a DR needs to be selected from multiple routers in the local area network. The DR is responsible for issuing routing information to a broadcast network or another router in a link, or collecting routing information of other routers. When the route with the same priority is selected as the DR, the router with the highest router ID becomes the DR.

The standby designated router (BDR): refers to a standby DR ready to be prepared on multiple access links. It receives all route updates from the OSPF adjacency router, but does not advertise the link information status (LSA)).

  • x
  • convention:

dagui  Visitor   Created Dec 25, 2018 17:59:04 Helpful(0) Helpful(0)

The standby designated router (BDR): refers to a standby DR ready to be prepared on multiple access links.Can you provide a more detailed explanation?
  • x
  • convention:

YOO  Visitor   Created Dec 25, 2018 18:00:39 Helpful(0) Helpful(0)

This is very useful on OSPF DR BDR configuration ,can you give a more detail sharing on this topic?
  • x
  • convention:

yiyi0519  Visitor   Created Dec 25, 2018 18:00:51 Helpful(0) Helpful(0)

If you set the OSPF network type is P2P, it no need to choose the DR and BDR
  • x
  • convention:

Mysterious.color  Visitor   Created Dec 25, 2018 21:39:56 Helpful(0) Helpful(0)

thanks for sharing
  • x
  • convention:

find what you love and let it kill you.
user_2915719     Created Dec 26, 2018 10:27:26 Helpful(0) Helpful(0)

Helpful to understand what the DR and BDR are designated for. Good explanation.
  • x
  • convention:

wissal  Visitor   Created Dec 26, 2018 15:31:15 Helpful(0) Helpful(0)

Good
  • x
  • convention:

chouhao  Enthusiast Technician   Created Dec 29, 2018 17:27:38 Helpful(0) Helpful(0)

sorry bro. I didn`t get your point from this case. I don`t really know what you wish to explain. can you please use a brief sentence or title to explain what you wish to show us? many thanks.
  • x
  • convention:

Reply

Reply
You need to log in to reply to the post Login | Register

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."
If the attachment button is not available, update the Adobe Flash Player to the latest version!
Fast reply Scroll to top