First of all: DR (Designated Router) and the BDR (Backup Designated Router) is in the ospf network of multiple access,
Because in a broadcast types of ospf networks, if every TWO routers neighbor relationship, then a large part of the network bandwidth is ospf packet, to avoid this situation, it appears, DR and BDR, main effect is in a broadcast network, all other routers with DR and BDR adjacency relationship, both of the rest of the other routers are both TWO - way, is the DRothers,
No difference on routing entry, BDR is DR backup,

CodePudding user response:

I think your question is a bit is not correct, exchange is not in the OSPF routing entry, when the network convergence, the same area of the router link-state database is consistent, then the router according to their own link-state database to calculate the routing table, the Dr And BDR just have the effect of collecting distribution, so there is only to reduce the number of different types of data traffic and reliability, so Dr. BDR link state table is consistent,

CodePudding user response:

reference 1st floor weixin_40290083 response:

I think your question is a bit is not correct, exchange is not in the OSPF routing entry, when the network convergence, the same area of the router link-state database is consistent, then the router according to their own link-state database to calculate the routing table, the Dr And BDR just have the effect of collecting distribution, so there is only to reduce the number of different types of data traffic and reliability, so Dr. BDR link state table is consistent,

that, see link-state area, area between the Dr See routing table
I can understand so

CodePudding user response:

refer to the second floor qq_40717135 response:

Quote: refer to 1st floor weixin_40290083 response:

I think your question is a bit is not correct, exchange is not in the OSPF routing entry, when the network convergence, the same area of the router link-state database is consistent, then the router according to their own link-state database to calculate the routing table, the Dr And BDR just have the effect of collecting distribution, so there is only to reduce the number of different types of data traffic and reliability, so Dr. BDR link state table is consistent,

that, see link-state area, area between the Dr See routing table
I can understand so

Regional seem to notice nor the routing table, but the link status summary, remember not too clear, experiment and see yourself, with GNS is better, closer to the real environment, PKT many commands are not, GNS is install configuration is more complex, the computer demand is higher,

CodePudding user response:

https://wenku.baidu.com/view/4ff438e9dcccda38376baf1ffc4ffe473268fd31

CodePudding user response:

https://wenku.baidu.com/view/ecfb47ab182e453610661ed9ad51f01dc3815734
This don't know if you can see, library is not Shared by to me,

CodePudding user response:

reference weixin_40290083 reply: 3/f

Quote: refer to the second floor qq_40717135 response:

Quote: refer to 1st floor weixin_40290083 response:

I think your question is a bit is not correct, exchange is not in the OSPF routing entry, when the network convergence, the same area of the router link-state database is consistent, then the router according to their own link-state database to calculate the routing table, the Dr And BDR just have the effect of collecting distribution, so there is only to reduce the number of different types of data traffic and reliability, so Dr. BDR link state table is consistent,

that, see link-state area, area between the Dr See routing table
I can understand so

Regional seem to notice nor the routing table, but the link status summary, remember not too clear, his look on the experiment, using GNS is better, closer to the real environment, PKT many commands are not, GNS is install configuration is more complex, requiring to computer,

thank you

CodePudding user response:

Regional announcement is LSA3 summary (link), is made up of ABR notices, summary here is when there are multiple same network link-state, select a optimal generation LSA3, not of continuous subnet, continuous induction to manually configure subnet, is beneficial to improve the network performance, to achieve this goal, to combine subnet partition and distribution network physical model design, the more difficult it is to the larger network

CodePudding user response:

BDR is DR backup device, Dr. Hung up the BDR automatically into DR,