As shown in the figure, the primary tunnel uses the path RTA -> RTB -> RTC. There are two FRR paths: One protects the link between RTA and RTB and the other one protects the link between RTB and RTC.If a path in the primary tunnel is faulty, which command can be used on RTA to locate the fault?
As shown in the figure , CE and CE 2 belong to VPN A, CE 3 and CE 4 belong to VPN B, VPN A and VPN B share the public network tunnels between border PE 1 and PE 2, and LDP tunnels are configured between PE 1 and PE 2. To isolate resources for VPN service data from PE 2 to PE 1, a unidirectional TE tunnel is configured t forward data from PE1. The QoS policy propagation though the border gateway protocol (QPPB) feature is configured on PE 2, and a QoS policy is defined when VPNs are bound to tunnel interfaces.
Which of the following statements about the configurations on PE 2 are true?
On the typical access network of a bearer network, a core network device connects to two
upstream CEs. CEs connect to PEs in a square shape. This access network must bear voice and
signaling services. A CE must be configured with two VPNs to separate the voice and signaling
services and ensure high security and QoS. The signaling service works in active/standby mode,
and the voice service works in load sharing mode. The VRRP must be enabled between the CEs to
terminate the signaling flow. If the network robustness is ensured and the network architecture is
rational, which of the following statements about the topological structure are true?
