ccna exam preparation questions

ccna exam preparation questions

Ip cef Next, R2 receives the tag packet. R2 knows that this is a tag packet from the type field of the Layer 2 Ethernet frame header of this packet, so it looks for its own LFIB table: R1 basic concept After the basic configuration is completed, since R2 and R3 are L1\L2 routers , for both of them, they will advertise themselves to the local level1 area as a way to go out ,ccna exam preparation questions, by setting ATT in the LSP generated by themselves . we R1 point of view isis database has been able to see out. R1#show isis database PLR ( Point of local repair ): Local repair point, this is the head end of the backup tunnel 0 (only media is shared) Certification Information R2.00-00 Set-overload-bit on-startup wait-for-bgp Oper: up Network 10.1.12.1 0.0.0.0 area 0 Priority 7 : 9375000 3 area addresses. The latest IOS version can be set to 255. If the maximum number of area addresses supported by the two routers is inconsistent, that is, the MAX.Areas field does not match, the IIH message is ignored . Pop tag Fa0/0 IS-IS *Aug 18 09:06:07.919: ADSPEC type 2 length 48: 33000 Interface eth 0/0 Show and debug Ip vrf forwarding VPN-A If R3-R5 , LDP is run , let R5 send the label packet, R3 receives the label packet, looks at the byte after the label stack, and finds the value is 4 , so it is determined to be an IPv4 packet, so the IPv4 header is The source and destination addresses are taken out for hashing to perform load balancing. Therefore, in the above figure, if R5 sends an IPv4 packet to R3 , R3 can directly identify and hash the source and destination addresses of the Ipv4 header to implement load balancing. AutoRoute defect The configuration of R1 is as follows: 75000 IGP Id: 1.1.1.1, MPLS TE Id: 1.1.1.1 Router Node id 1 When the change attribute (path bandwidth), using Make Before Break manner Mpls traffic-eng tunnels mpls label range 300 399 Mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 1/0/0 Network 10.1.34.3 0.0.0.0 area 0 mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 2.2.2.2 Src 1.1.1.1, Dst 4.4.4.4, Tun_Id 0, Tun_Instance 163 RSVP Path Info: Global Pool Sub Pool Basic experiment Mpls ldp router-id loopback0 !! Interface priority for electing DIS Type escape sequence to abort. Tracing the route to 5.5.5.5 The paragraph appears in the first paragraph. Ip router isis interface Serial0/0 This command will cause the penultimate hop router to still carry the label when sending data to the end. This label is an empty label. LIB tag information base 75000 In all remote labels that bundle a particular prefix , the LSR uses only one of the labels to determine the outbound label for the prefix. RIB , which is the routing table, determines what the next hop of the IPv4 prefix is. The LSR selects the label of the next hop in the routing table that reaches the prefix from the remote label received by the downstream LSR . The LSR uses this information to create its own label forwarding information base, LFIB .