Zte ZXR10 8900 Series Command Reference Manual page 47

There is no OSPF sham-link on VPN link without configuring this
Defaults
command.
1. Only if the following five conditions are simultaneously satisfied
Instructions
can Sham-link be up.
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2. When to use sham-link:
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3. The Loopback interface address that the sham-link uses needs
binding the corresponding VRF.
4. The free switch between the VPN link and the backdoor link is
realized by changing the sham-link cost.
5. The area sham-link uses should be consistent with the area of
VPN site.
6. If the area does not exist, it will be created automatically.
7. This command is supported after the platform version 4.6.03.
8. Some changes of the loopback physical interface will take ef-
fect on the sham-link interface. Pay attention to the following
points:
i. Only some changes will take effect, as shown in the follow-
Sham-link is configured.
Source-address and destination-address IP address have
the corresponding interface.
Destination-address has the corresponding bgp route.
Make the configuration in the circumstances of the OSPF
VRF instances.
There is the redistribution of bgp in the circumstances of
the OSPF VRF instances.
The VPN sites between two PEs are in the same OSPF area.
The two VPN sites have backdoor link (private link) and
they are in the same area.
ing table.
command
authentication
authentication-key
cost
dead-interval
hello-interval
message-digest-key
mtu-ignore
network
priority
retransmit-interval
transmit-delay
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Chapter 3 OSPF Protocol
taking effect or not
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
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