ccna objective questions and answers pdf

ccna objective questions and answers pdf

0x00000029 0x4769 Fa0/0 Router(config)# mpls ldp targeted-hello holdtime x interval y Ip cef One is the LAN on to Ll Router ( Level-1 to the IS the Hello PDUs the IS LAN ), a method in LAN on to L2 of Router (a to the IS LAN the Hello PDUs the IS Level-2 ) Build an IP routing table Tunnel mpls traffic-eng autoroute metric relative -1 Create a TE tunnel on R1 , the source is its own loopback0 , and the destination is 4.4.4.4 of R4 . Type : 0x8847 (unicast) upper layer carries MPLS , find LFIB *Aug 18 09:06:07.919: 10.1.12.2 (Strict IPv4 Prefix, 8 bytes, /32) NSEL is 00 ( 1B from the right ) The system ID is 0000.0c00.1111 The area ID is 39.0f01.0002 The configuration of R4 is as follows: Two addresses are configured on the R5 interface: 10.1.35.5 and 10.1.35.55 to simulate two different source hosts. IS-IS allows the entire domain to be divided into multiple zones, using a two-level hierarchical structure. L1/L2 router re-releases external routes into IS-IS ( to level1 ) Tag rewrite with Fa0/0,ccna objective questions and answers pdf, 10.1.34.3, tags imposed: {303} Router ospf 1 Interface eth0/0 ISIS consists of two levels: What is the difference between POP and Untag in Outgoing tag(Label) ? An intermediate system (which can be understood as a router) has at least one NET (up to 254 ) and the system ID must be the same. Cisco routers support up to three NET addresses by default , which can be modified using the following command: This command will cause the tail router to advertise implicit empty labels. (default action notification explicit empty label) Local binding: tag: imp-null Interface eth0 1/0 My Address: 10.1.12.1 System ID , larger than Interface Reservable Bandwidth[0]: See below for more details. Mpls traffic-eng tunnels ip rsvp bandwidth Sub Pool Source routing, policy routing, static routing, etc. Fa0/0 Current LSP: Interface fast1/0 The TCP/IP protocol stack, similar to ES-IS , is done by ARP , ICMP , and DHCP protocols in the TCP/IP stack . Route summary divides the original segment of LSP into two segments Network 2.2.2.2 0.0.0.0 area 0 In IS-IS , there are three in the HELLO packet: one is the interface point ( Point-to-Point the IS to the IS Hello PDUs ), one is LAN on to Ll Router ( Level-1 to the IS the Hello PDUs the IS LAN ), a method Is the L2 router on the LAN ( Level2 LAN IS to IS Hello PDU ) *Aug 18 09:06:02.699: HOP type 1 length 12: Traceroute 1.1.1.1 source 10.1.35.5 ----------- ---------- ! Mpls traffic-eng tunnels mpls label range 300 399 *Aug 18 09:06:07.919: 10.1.45.5 (Strict IPv4 Prefix, 8 bytes, /32) OSI terminology The PoP : receives downstream air sent by the tag assigned to a specific prefix, the value of this tag is 3 , then the LSR to the downstream LSR transmits the prefix data destined time, he will put up top label ( the POP ) for Forward, note that this time only need to check for this LSR When using the Explicit method to establish a tunnel , you need to associate an explicit path . 0x80000011 0x00F741 2 L1 (inside the area) and L2 (in the area) Conceptual introduction Tunnel mpls traffic-eng autoroute metric absolute 32 Looking at the above topology, we need to establish a TE tunnel between R1 and R5 . Under normal network conditions, we want the tunnel path to be R1-R2-R5 , which is an explicit specified path. In order to make the tunnel path have a backup, we can define a path-option , this path uses the dynamic setting method, let CSPF calculate it by itself, then the configuration is as above. The TLVs used are: Modify target ldp session related parameters Basic knowledge point This relative command can be configured with a value of -10 to 10 . This means adding or subtracting this specific value based on the IGP metric. For example figure above, without considering the tunnel in the case of, R2 on about 5.5.5.5 and 55.55.55.55 Routing Metric = 31 is . This value has been said above. Now we configure this with relative -1 after the command keywords, relying on autoroute calculated, point tunnel0 mouth of OSPF routing, Metric becomes 31-1 = 30 .