A.ISIS's GR notifies of events and maintains neighbor relationships through CSNP messages.

B.The GR feature of AISIS is turned on by default.

C.ISIS's GR has a total of four timers.

D.ISIS's GR defines a new TLV structure to support this feature.

A.A VRRP backup group cannot monitor Peer BFD, Link BFD, and Normal BFD

B.at the same time If you configure to monitor multiple BFDs at the same time Then the various configurations are interrelated and may have an impact

C.Use VRRP to monitor BFD sessions or EFM features, either in BPD sessions or EFM session states After the change, the VRRP module is notified to achieve fast VRRP switching

D.When a VRRP backup group monitors normal BFD, when the BFD state changes, the active-standby state is changed by modifying the backup group priority

A.In the CE dual home network, it is possible to generate loops, and you can use route-tag to solve the loop problem.

B.VRFs of two PEs connected to the same CE can belong to different VPNs.

C.CE accesses the backbone through two links that can be used as both load sharing and primary and standby links.

D.CE and PE form a CE dual-home network, which can ensure high network availability.

A.A TTL that acts like an IP header and is used to prevent message loops

B.To control label distribution

C.Limit LSR

D.Control of upstream devices for label distribution

A.Manually configured LDP FRR policies default to 32-bit backup routes that trigger LDP to establish backup LSPs

B.LDP and IGP linkage, the need for IGP has been routed to release, to ensure that LDP and LGP path consistent

C.LGP GR takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

D.LLDPFRR also allows LSPs to be generated for tag mappings from non-optimal next hops, and as a live LSP backup, supervising forwarding table entries