cisco ccna practice test

cisco ccna practice test

The BGP4+ configuration of R3 is as follows: Address classification Test Description: in R3 on of ping FF04 ::. 1 , the local interface Loopback0 ipv6 rip RIPprocess enable !! activates the RIP Interface fast1 / 0 PE1 , P , and PE2 form an LDP neighbor relationship and deliver IGP labels. In order to facilitate the observation of experimental phenomena, the label range of PE1 is set to ! The above configuration is only to solve the problem of data direction, but the problem of NAT : Then, R3 deploys the two-way re-release, so the process 2 route is injected into process 1 , then the route of the A network segment will be injected back into process 1 , so that the priority of O is greater than OE , so R1 and R2 directly ignore this. Strip routing. Will not cause other effects. No ipv6 nd suppress-ra Ipv6 route 2002::/16 Tunnel0 Ipv6 address 2001:34::4/64 IE6.0 does not support access to IPv6 sites by entering the literal ipv6 address defined by rfc2732 in the address bar . The solution is to access the domain name and modify the hosts file C:/windows/system32/drivers/etc/hosts Bgp connected eigrp Slot Slot unit 0 VC -1 FastEthernet0/0 is up, line protocol is up Global command,cisco ccna practice test, enable IPv6 multicast-routing . After the switch is enabled, all IPv6- enabled interfaces automatically open IPv6 PIM. Ipv6 router rip RIPprocess exit Image Define set action Abbreviation of IPv6 address Solution: Modify the routing protocol management distance Duplicate address detection: The node sends an NS to the Solicited-Node multicast address corresponding to the tentative address that it will use . If it receives the NA of the response from another station , it proves that the address has been used on the network, and the node will not be able to use it. Use the tentative address communication. CISCO routers have two ways to find the global lookup of routes: classful ( Classful ) lookup mode and classless ( Classless ) lookup mode. Static routes At infinite Access-list 2 permit 2.2.2.0 Network 4.4.4.4 0.0.0.0 area 0 Interface Serial0/0 Image OR1 configuration Passive-interface configuration Redistribute ospf 3 subnets route-map OSPF3to1 router ospf 2 When 10.4.0.0 is hanged , C will immediately send a route poisoning message ( 10.4.0.0 16 hops) and then advertise it; Well, then continue, now R1 and R3 Ethernet interfaces are activated RIPng , so both interfaces will multicast RIPng messages to the LAN , and this action is actually meaningless, so we can use this Ethernet The mouth is passive . Unfortunately, there is no mechanism for defining passive-interface in RIPng . If there is a response, Reachable , if not, enter Empty , that is, delete the entry. Exit-address-family Route-map The arrival ISATAP the loopback of IPv6 packets, on a quilt ISATAP of IPv4 tunnel header, and then passed ISATAP Wherein, R2 back to R1 of ICMPv6 error message is as follows: ! Manual tunneling technology: manual IPv6 over IP tunnel, GRE tunnel Ip route 172.16.1.0 255.255.255.0 192.168.12.1 Request the entire routing table: The request message contains a single route with an address family identifier field of 0 (address 0.0.0.0 ) and a metric of 16. The device receiving the request will unicast it back to the requesting address. The entire routing table. Set ip default next-hop 10.1.12.1 Version 2001:1111::1/128 16/32 bit Image Interface Tunnel1 At the same time, the same OSPF route is learned from both processes and is used on a first come, first served basis. Therefore, if R3 first learns the route from R1 , it will naturally ignore the one that R2 re-releases. However, if the neighbor relationship between R1 and R3 is already obtained in R3 Interface Serial0/0 ipv6 enable Image Destination address: The address of the host or network. Image 1 : RIP-1 ; Experiment 2 If the feature is not enabled on the local end, the data packet is either routed successfully or never routed out (discarded). Image LSA flooding and aging mechanisms are the same Unicast update ! Ipv6 ospf 1 area 0 bibliography Requested node multicast address Solicited-node The configuration of PE2 is as follows: OI 2001:1:1::1/128 [110/192] Configuration command: In interface mode, you must configure the interfaces on both ends of the link. After the completion, you can show ip rip database to view the routing details. / / Mark the routing table 192.168.1.0 as the default network Packets with destination addresses that do not exist at the beginning of 192.168 are discarded directly. Normal traffic on other subnets of the 192.168 intranet will be forwarded according to the longest matching principle. IPv4 The next hop of 1.1.1.0/24 , because the AD value of OSPF is better than RIP . Neighbor state 10.1.31.0/24 This subnet has been successfully updated " 10.1.31.0 " because it is the same as the main source of the R1 update source interface . In the above example, the phenomenon we mentioned, R4 will know the route from OSPF and RIP to 192.168.1.0/24 , and finally R4 will choose OSPF route. This is a phenomenon we don't want to see in this environment, because it creates a sub-optimal path. The AD values ​​for several common routing protocols are listed below: By default , Cisco routers enable fast switching or optimal switching or cef switching instead of process Ipv6 enable If the RA packet contains authentication information, then the authentication is correct Similar to private addresses in IPv4 . Ipv6 address 2002::2/128 At Jul 31 2012 23:59 OR2 configuration Protocol Interface IPv6 application The same prefix is ​​obtained through different protocols, first than AD , and later than metric IP address, and then take the destination IP address to look up in its own routing table. After finding the "best match" entry, the packet is forwarded according to the outbound interface or next hop IP indicated by the routing entry . This is the IP route. ( IP routing ) . And each router maintains a routing table locally. ...... The configuration of R1 is as follows Match x1 match x2 , x3 set Y 1/64 Ipv6 ospf 1 area 2 133 The configuration of R2 is similar. After the configuration is complete, the RIP messages are exchanged between R1 and R2 , and the unicast is performed, so that the PC will not be affected. We found that R1 created a cache, the identifier from 2012::1 to 2034::4 , PMTU=1400 , so R1 in the subsequent message sent to 2034::4 , if it exceeds 1400 bytes, R1 will Fragmentation, for example, we will test again, continue to ping 2034::4 on R1 , the message size is 1500 bytes, then: B ............ Network 192.168.10.0 0.0.0.255 area 1 In the above figure, two routers , R1 and R2 , exchange information with each other through RIP . However, since RIPv2 sends routing updates and related messages based on multicast, once two routers activate RIP on the interface , the PC will have to consume resources to process these multicast messages that it does not need.