ccna certification sample questions

ccna certification sample questions

----------- ---------- Name: R1_t0 Ip address 10.1.34.4 255.255.255.0 !! activation level1 of MPLS TE LSP serial number Data link layer address OSI terminology ! Router-id 5.5.5.5 75000 10 Type 7 length 12: OSPF is routerID Extended IP reachability TLV (type 135 ) Options: (No TOS-capability, DC) LS Type: Opaque Area Link 203 We see the above output, R1 , R2 , R3 all generate LSP , and the asterisk entry is issued by R1 itself. In addition, there is a special MPLS configuration ( frame mode ) In R1, this L1 router attempts to perform route summarization. The result is a failure. This is similar to OSPF . Routers in the area cannot be routed. Because we want to flood the LSP , the routers in the area must know the area. For details of the topology, if the L1 router is allowed to perform route summarization, does it lose the nature of the link state routing protocol? Each hop LSR that the TE tunnel needs to traverse is added to an ERO . This is an ordered list of interface IP addresses, each LSR The trick of traditional IP routing: LDP is in Frame Mode . The LSR assigns a label to each route. The local direct route is assigned a POP. Next Hop R5 is also similar: Activate the MPLS TE extension for each router's OSPF and manually set the RouterID for MPLS TE . Show mpls traffic-eng topology ? neighbor is a neighbor of the LDP routerID accept acl to match the prefix IGP metric: 1 Interface The above figure encapsulates a three-layer label package. For an LSR , only the first label is processed. Each layer of the label has a bottom of the BoS stack to indicate whether it is already the bottom of the stack of the label, and the last label has BoS=1 . Basic concept of FRR 0/0/0 Config Parameters: L2 router , connected to different Leve1 area . Stores a separate Level2 LSDB . TE Metric is equivalent to the concept of weight value, note that this is to be distinguished from IGP metric The tunnel configuration of R2 is modified as follows: *Aug 18 09:06:07.919: Session Name: R1_t0 3.3.3.3/32 Based IP traffic engineering is connectionless, not an explicit path ( Explicit routing ) The establishment of an OSPF adjacency involves a more complex process. Router(cfg-ip-expl-path)#next-address 10.1.12.2 !! Note the input order IS Hops: 0 i L1 OSP PDU Point2point 17 Area-password cisco Interface eth 0/0 Complete MPLS TE configuration on R1 . Both support two levels of hierarchical routing Take it. Each tag mapping message contains two elements : FEC TLV and Label TLV Tunnel mpls traffic-eng forwarding-adjacency Interface Tunnel0 Another example of causing IGP and LDP to be out of sync is that when the LSR is restarted, the IGP can quickly establish an adjacency, and the LDP session may be set up slowly, that is,ccna certification sample questions, the necessary information is loaded in the LFIB . IGP forwarding has already begun before the correct label exchange . The message may then be forwarded incorrectly or dropped somewhere after entering the MPLS network.