ccna exam review questions

ccna exam review questions

(The router address and link information in the result of capturing the packet are respectively). R1#sh mpls traffic-eng topology 1.1.1.1 (1.1.1.1 is a local router ) Ip unnumbered loopback 0 Router ospf 1 ! 0/0/0 Mpls ldp router-id loopback0 Path Protect Parameters: 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 . Interface eth 0/0 Ip vrf VPN-A rd 2345:1 Regional separation 10.1.45.4 10.1.45.5 Mpls traffic-eng tunnels ip rsvp bandwidth *Aug 18 09:06:07.919: Outgoing PathTear: In RFC5250 In been described herein: A neighbor Capable IS-opaque and only IF The IF IT sets-O 'bit in the Options The ITS Database Field of the Description packets; The-O' bit the NOT SHOULD BE SET When ignored and the MUST BE Object name 130 Local tag Frame-relay map ip 10.1.123.2 301 broadcast Configuration command Minimum Path Bandwidth (bytes/sec): 2147483647 Path Latency (microseconds): 0 Ip explicit-path name R2R4R5 enable next-address 10.1.12.2 L2 router has a Level 2 link state database, which contains routing information between all areas. 0/0/0 A label switched path (LSP) *Aug 18 09:06:07.919: SENDER_TEMPLATE type 7 length 12: In CISCO IOS routers, IOS cannot automatically allocate bandwidth-based link (interface) metrics. Regardless of the bandwidth of the link, the default IS-IS metric for all interfaces is 10 , of course you can modify it. The maximum metric for a full path is 1023 . Of course, the IETF has extended the default metric . Mpls traffic-eng tunnels mpls label range 500 599 0 kbits/sec !! This is the mapping of IP Untagged --------------- 0 Link ID:: 0 !! R2 has two direct links to participate in MPLS TE . This is the first, which is F0/0 . It is found that a targeted session is established between R1-R3 . Now, let's come back to the Fa1/0 port of shutdown R1 . 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 . Ip unnumbered Loopback0 tunnel mode mpls traffic-eng tunnel destination 5.5.5.5 Connection method) Type 1 length 12: LOOP Detection For Level1 router , the area number is required to be the same. Net 49.0001.4444.5555.6666.00 ! ! Set-overload-bit on-startup <5-86400 sencondes> 906 R1 , R2 , R3 , and R4 run the LDP protocol. O Redistribute ospf 1 vrf VPN-A match internal external 1 external 2 exit-address-family Interface Loopback0 !! set overload-bit The first is the case of no forwarding adjacency: After the configuration is complete, we find that the adjacency relationship between R1 and R2 is UP , that is, the area authentication does not carry the authentication information in the IIH packet. Not only that, but the PSNP sent by R1 also has no authentication information, but the issued LSP has clear text authentication information. The experimental phenomenon is quite interesting. For R1 , all IS-IS messages received by R2 are not authenticated. R1 mainly focuses on LSP . It is found that the LSP sent by R2 has no TLV for authentication , so R1 ignores The LSP sent by R2 causes the routing table of R1 to be empty. However, although the LSPs sent by R1 are all with authentication information, R2 is not enabled.Area authentication, so R2 receives this packet, can also read, and can also use these LSPs ,ccna exam review questions, so R2 can learn the route of R1 .