UDLR Tunnel – with NHRP
10.1.1.0
10.2.1.0
10.5.1.0
10.9.1.0
10.3.1.0
10.6.1.0
A
C
B
Router A
! Unidirectional link
interface ethernet 1
ip address 10.2.1.1 255.255.255.0
ip nhrp network-id 5
ip nhrp server-only
Router B
! Unidirectional link
interface ethernet 0
ip address 10.2.1.2 255.255.255.0
ip nhrp network-id 5
ip nhrp nhs 10.2.1.1
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