Example 20-10
Confirming the Current OSPF Router ID
R1# show ip ospf
Routing Process "ospf 1" with ID 1.1.1.1
! lines omitted for brevity
Implementing Multiarea OSPF
Even though the current CCNA 200-301 exam blueprint mentions single-area OSPF and
does not mention multiarea OSPF, you only need to learn one more idea to know how to
configure multiarea OSPF. So, this chapter takes a brief page to show how.
For example, consider a multiarea OSPF design as shown in Figure 20-4. It uses the same
routers and IP addresses as shown earlier in Figure 20-2, on which all the examples in this
chapter have been based so far. However, the design shows three areas instead of the single-
area design shown in Figure 20-2.
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