cisco exams actual tests

cisco exams actual tests

TE metric: 1 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 . Maximum reservable bandwidth information: ISO10589 Token bucket fragment (service_id=1, length=6 words parameter id=127, flags=0, parameter length=5 Ip address 10.1.34.3 255.255.255.0 *Aug 18 09:06:07.919: HOP type 1 length 12: Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 For IP applications , 1 byte defines AFI in the NSAP address , at least 2 bytes defines the actual area information, 6 bytes defines the system ID and Designated Intermediate System designated intermediate system There is DIS in the LAN , DIS generates and updates the pseudo node information, and spreads the LSP in the LAN . The DIS sends CSNP every 10s , which lists the LSPs stored in its link state database . These CSNPs are multicasted to all IS-IS routers on the LAN . Mpls ip Interface fas0/0 Uptime: 10 seconds Selection: reoptimization Now let no shutdown R1 of Fa1 / 0 mouth, then R1 and R3 open the LDP session protection. Next Hop Network 2.2.2.2 0.0.0.0 area 0 LDP Router isis PHP penultimate jump pop-up mechanism Fa0/0 Net 49.0001.0000.0000.0002.00 Note: IS-IS 's Backbone is not what a particular area As a result, the Level 1 LSP sent by R1 carries the cipher text authentication TLV . However, since R2 does not enable authentication, the LSPs sent by R1 are sent to R2 . R2 ignores the authentication information in the LSP and directly reads the LSP . Therefore, R2 can learn the route advertised by R1 . Of course,cisco exams actual tests, there is no R1 routing. Fa0/0 ISO IS-IS Routing Protocol The above output is the opaque-area LSA of type10 flooded by each router in area0 in this environment . You can take a closer look at it, for example, look at R1 itself to generate LSA10 : There are four metric types: Router-id 3.3.3.3 IS-IS supports ISO CLNP and IP environments Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Mpls traffic-eng signalling advertise implicit-null [acl x] The previous experiment used IBGP to establish IBGP adjacency on R1 and R4 to help you understand the MPLS environment. Then the LSR pushes the IP packet into a tag header, tags 204 , and forwards it out from the F0/0 interface. In CISCO IOS , CEF switching is the only IP forwarding mode that can be used to mark messages . Therefore , CEF must be enabled on the router when MPLS is enabled . 75000 R2 (config-keychain)#exit The existence of the established tunnel has changed. The network environment at this moment is as follows: Type 1 length 52: Link state ID Routing information diffusion in point-to-point links 0x0000000C IS R3.00 Assume that this is an internal network of the operator, R4 is the national trunk, R2 and R3 are left to the provincial, and the provincial internal ran IS-IS to carry the routing prefix information in the Core , and as the provincial dry exit R2 , R3 The route prefix or default route of a specific national trunk is issued. We take the default route example here. Both R2 and R3 maintain the EBGP neighbor relationship with R4 . In this case, R2 is required to be upgraded and then restarted. After the restart, IS-IS converges faster than BGP . After the first convergence, R2 to the IS-IS area. Internal flooding LSP , R1 will use R2 as the next hop of some route prefix, or the next hop of the default route. However, at this time , BGP of R2 does not converge, so that R2 is reached.The data may be discarded and black holes appear.