ccna exam topics pdf

ccna exam topics pdf

1.1.1.1/32 Domain-wide Prefix Distribution with Two-Level IS-IS Router(config)#Ip cef *Aug 18 04:37:06.239: Tun Sender: 1.1.1.1 LSP ID: 20 The configuration of ip rsvp bandwidth R3 is as follows: The LSP : R3.02-00 , here marked as non-dummy node 0 , then R3 is a the DIS , and that the LSP , is a dummy node the LSP . ! 18 R1#show ip cef 4.4.4.4 Here is a point to note, we look at the E router, in fact, it will receive the label binding of its own LDP neighbor B and C , which has a label about the route X bundle, then E is stored in its own LFIB table. Which neighbor's remote label is it? The answer is C , because C is the next hop of the E router to X , and E will use the routing table to determine who's label bundle is "better". 128 Neighbor 10.1.24.4 remote-as 45 no auto-summary Tunnel mpls traffic-eng path-option 10 dynamic Type escape sequence to abort. Tracing the route to 4.4.4.4 ! TE metric: 1 *Aug 18 09:06:07.919: peak rate =250000 bytes/sec 0/0/0 Or Tunnel Id LSP TLV field of Level 2 route ! ISIS in NBMA environment Network 10.1.45.4 0.0.0.0 area 0 Mpls traffic-eng tunnels ip rsvp bandwidth The configuration of R4 is as follows: Like all IS-IS packets, the HELLO package consists of a header and a TLV . Once LDP is activated,ccna exam topics pdf, the LSR generates a label locally for the prefix in the routing table, and then bundles it with the prefix to send the label mapping message to all LDP neighbors. When I receive the remote binding from the LDP neighbor , I bundle the tags and the local bindings that are localized for the specific prefix into the LIB . For TE of ISIS extension Mainly used to replace type 2 TLVs to provide larger metrics. In addition, it also supports IS-IS based MPLS TE ! LAN on the MAC or the X.25 , FR or ATM in the virtual circuit ID O Different TLV field values ​​can be included in the LSP to advertise various different routing information. The PATH message is delivered from the headend router to the following router, then the next hop router will remove its own IP from the ERO . Mpls traffic-eng tunnels mpls ip Priority 4 : 9375000 Network 5.5.5.5 0.0.0.0 area 0 *Aug 18 11:31:44.598: Ip router isis interface Serial0/0 Now let's add R4 . Note that R4 is only equipped with OSPF at this time . First, don't configure mpls ip on the interface connected to R1 (or use Router-id 4.4.4.4 9 *Aug 18 11:26:02.546: Interface eth 0/0 Impact of route summarization on MPLS Local binding: tag: 104 Prefix ES Et0/1 Level1 area default route Fa0/0 IS-IS and ES-IS do not place routing information in IP or CLNP packets, but directly in the data link layer Frame (so that packaging is more efficient). Mpls ip To support regional repair ! Interface eth 0/0 *Aug 18 04:37:06.243: average rate = 250000 bytes/sec, burst depth = 1000 bytes Link Link 0x00000010 System ID This packet. The CEF entry indicates that to go to 4.4.4.4 , the IP packet needs to be stamped with a value of 203 , and then the packet is dropped to the next hop 10.1.12.2 and thrown out from the Fa0/0 port. After all the LDP routers have sent the label bundles to each other, everyone gradually builds their own LFIB . Untagged The configuration of R3 is as follows: Similar to the concept of DR in OSPF If a router plurality of distribution on the net, these NET system ID must be the same. *Aug 18 11:26:02.546: Mpls traffic-eng tunnels mpls label range 400 499 The boundary of the area is on the router 0x4F65 Interface loopback0 100 Moreover, since the default duration is indefinite, these entries will remain. Of course, if you modify the configuration on R1 : IGP metric: 1 ! 301 Reservable Eventually this tagged package with 403 and 505 is sent to the TE Tunnel , so: 10.1.23.0/24 Network 4.4.4.4 0.0.0.0 area 0 Peak rate Area Address(es): 49.0001 SNPA: cc02.1ab0.0000 103 [115/30] via 10.1.24.2, Serial0/0 2.0.0.0/24 is subnetted, 1 subnets Router-id 4.4.4.4 Inter-area IP routing changes; *Aug 18 09:06:02.699: Path MTU: 1500 *Aug 18 09:06:07.919: Session Name: R1_t0 Used to establish and maintain adjacent relationships Tunnel mpls traffic-eng forwarding-adjacency Outgoing interface 0 kbits/sec Modify the configuration of R2 : Router ospf 1 Ip router isis encapsulation frame-relay Ip address 4.4.4.4 255.255.255.255 *Aug 18 11:31:44.598: Path MTU: 1500 Conservative mode : Conservative Retention ( ... omit... ) AutoRoute: disabled LockDown: disabled Loadshare: 0 bw-based auto-bw: disabled The configuration of R1 is very critical, let's focus on it: The interface is assigned a new metric value; Interface eth 0/1 Access-list 1 permit 5.5.5.0 route-map test permit 10 Indicates whether the LSP is from L1 router or L2 router . This field is 2bits . 00- not used; 01-level1 ; 10- unused; 11-level2 Router-id 2.2.2.2 LSPID *Aug 18 09:06:07.919: Session Name: R1_t0 Ip address 10.1.34.3 255.255.255.0 O bits are defined in OSPF in the option field is used to indicate whether the router has the ability to send and receive opaque the LSA . In OSI terminology, a host (such as a PC ) is called an ES (end system) and a router is called an IS (intermediate system). ES-IS can be said to be a "language" or routing protocol between an end system and a router. It is used to enable the end system and router on the same network segment or link to discover each other and allow the ES to learn its network layer address.