多选题Which three statements about the Cisco MPLS TE Fast Reroute （FRR） process are true？（）ATE tunnels that are configured with the FRR option cannot be used as backup tunnels.BTE tunnels that are configured with the FRR option can be used as backup tunnels.CThe backup tunnel that is used to protect a physical interface must have a valid IP address configured.DInterfaces must use MPLS global label allocation.EThe source IP address of use backup tunnel and the merge point （MP） should not be reachable.
多选题
Which three statements about the Cisco MPLS TE Fast Reroute （FRR） process are true？（）
A
TE tunnels that are configured with the FRR option cannot be used as backup tunnels.
B
TE tunnels that are configured with the FRR option can be used as backup tunnels.
C
The backup tunnel that is used to protect a physical interface must have a valid IP address configured.
D
Interfaces must use MPLS global label allocation.
E
The source IP address of use backup tunnel and the merge point （MP） should not be reachable.
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