ccna exam test questions

ccna exam test questions

75000 We saw R4 assigned to the LDP label 403 with the prefix 5.5.5.5/32 in the LFIB table of R2 . Ip address 1.1.1.1 255.255.255.0 ip router isis Tunnel mpls traffic-eng path-option 10 dynamic i L1 Network 1.1.1.1 0.0.0.0 area 0 Overview *Mar 1 00:00:32.759: ISIS-Upd: full SPF required Router ospf 100 My Address: 10.1.12.1 So using this feature (an IS-IS process to configure multiple NET addresses), you can achieve: Supports allocating network resources for explicit LSP tunnels Except for HELLO packets based on UDP646 , other packets are based on TCP port number 646. * Aug 18 04: 37: 06.239 : Outgoing PathTear: !! dismantle tunnel Version=0 length in words=10 *Aug 18 09:06:07.919: IS Hops:0 Reservable Bandwidth[2]: To sum up, I said three commands: 569 Status 1bit DIS send HELLO interval ordinary packet router of 1/3 (default 3.3s ), which ensures DIS when a failure occurs can be more quickly found. TE with Layer 2 overlay 1.1.1.1/32 The area address groups configured on the router are listed. SNPA is equivalent to the Layer 2 address of NSAP or NET . Net 49. 0001 .0000.0000.0001.00 Router-id 6.6.6.6 There are two types of LSPs : Level1 LSP PDU and Level2 LSP PDU. Link ID Router isis Local binding: tag: 100 PDU C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/24 is subnetted, 1 subnets SRM and SSM are used to coordinate diffusion and database synchronization To peer-access-list - the IP access-list that selects the MPLS neighbors that will receiver the labels ! R3#show ip route TLV Router ospf 1 RFC1195 Ip cef Event caused reoptimize R1(config)#router isis The TE LSP tunnel is initiated by the head end of the tunnel. Circuit circuit *Aug 18 11:26:02.546: Router isis IS-IS Hello message ( IIH PDU ) Consider in detail the details of the adjacency relationship establishment process: MPLS technology architecture IP interface address lab environment IS-IS allows the entire domain to be divided into multiple zones, using a two-level hierarchical structure. Adjacent router Let's look at an example: The unit is Bytes , multiplied by 8 is 100Mbps The boundary of the area is on the link Router ospf 1 AutoRoute defect 0x2995 Switched R2-PE1#show ip route 0xD3FB ! First of all, all routers run routing protocols, and the entire network is interoperable. Next, LDP is activated on the interface of the router, and an LDP adjacency relationship is formed between the two routers . OSPF Router with ID (1.1.1.1) (Process ID 1) Interface Ethernet0/0 We found, R2 external routing re-released locally gone; R2 from level2 injection level1 of inter-area routes are gone; while R2 can not be used as R1 next hop of the default route. There is only one R2 local direct connection 24.0 route. Periodically send CSNPs every 10S in the broadcast subnet to flood LSPs Establish mapping of data link layer address to network layer address ( CLNP address) The configuration of R1 is as follows: Ip address 10.1.56.6 255.255.255.0 10.1.12.2 *Aug 18 04:37:06.239: Flags: 0x0 ! Interface eth0/0 Address-family vpnv4 neighbor 5.5.5.5 activate The IETF 's draft-ietf-isis-ipv6-05.txt specifies what IS-IS adds to support IPv6 . It is mainly a newly added two TLVs ( Type-Length-Values ) supporting IPv6 routing information and a new NLPID ( Network Layer Protocol Identifier ). IS-IS is not like RIP and OSPF . These two protocols have separate versions of RIPng and OSPFv3 support IPv6 . 3.3.3.3 Configure MPLS TE tunnel on R1 . Maximum reservable bandwidth : 9375000 Number of Priority : 8 Traceroute 1.1.1.1 source 10.1.35.55 The configuration of R1 is as follows: Still this figure, but the configuration of R2 becomes: ! *Aug 18 09:06:07.919: SENDER_TEMPLATE type 7 length 12: Next-address loose 10.1.34.4 The LFIB table does not contain inbound interface information. Prefix adjacent router Mpls traffic-eng tunnels ip rsvp bandwidth In this way, R2 will ignore the LDP hello packet received from the R1 on the interface , and then the LDP adjacency between R1-R2 will DOWN after a while. The configuration of R4 is modified as follows: Mpls traffic-eng router-id loopback 0 mpls traffic-eng level-1 Set-overload-bit The configuration of R5 is supplemented as follows: Pop tag Label space:Per-Platform Length Load balancing of tagged messages IS-IS by Hello PDU padding size to the interface MTU large *Aug 18 11:31:44.598: Network 10.1.23.2 0.0.0.0 area 0 mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 Network 10.1.45.4 0.0.0.0 area 0 10.1.34.4 [MPLS: Labels 404/505 Exp 0] 0 ​​msec 0 msec 0 msec Number of Links: 3 Ip address 10.1.23.2 255.255.255.0 0 kbits/sec Mpls ldp router-id loopback0 IS-IS and OSPF Or ISIS will flood the LSP . So we get the following information: This TLV , in this way, provides a simple and reliable mechanism for advertising hostname information. As shown in the figure below, this is an LSP message: 0 kbits/sec !! OSPF cost of the interface 10.1.12.2 Down Thresholds: 100 99 98 97 96 95 90 85 80 75 60 45 30 15 *Aug 18 11:31:44.598: Next, the data is sent to R3 . After R3 checks its own LFIB table, it replaces the 303 tag with 203 and then throws it to the next hop R2 . After receiving the label package, R2 looks at its own LFIB table and finds that the outgoing action is a PoP . Then the label is ejected and becomes the original IP packet, and then it is thrown to R1 . Finally, R1 forwards the IP packet to R5 . So why is R2 here PoP here ? The answer is that this BGP routing, we talked about earlier, in fact, it is using a next hop 10.1.15.0 label,ccna exam test questions, 10.1.15.0 is R1 directly connected network segment, so the R1 when the label assigned to the route , gave it aPoP , then distribute this result to R2 , which is why.