As shown in the preceding command output, IS-IS runs between R1 and R2, and OSPF runs between R2 and R3. Therefore, the loopback interface on R2 can be added to both OSPF and IS-IS. After the preceding configurations, R1 and R3 can learn the loopback address of R2 through the protocols.
I do not want R1 and R3 to communicate with each other. Is there any problem with the configuration?
The configuration is not affected. OSPF and IS-IS are still two separate IGP areas. R1 can communicate with R3 only after routes are imported between the two areas on R2.
The configuration is not affected. OSPF and IS-IS are still two separate IGP areas. R1 can communicate with R3 only after routes are imported between the two areas on R2.
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