ccna exam simulator

ccna exam simulator

At Jul 31 2012 23:59 Image OE2 2004:1:2::/64 [110/20] FF00::/8 The IPv4 and IPv6 address plans are as shown in the figure above. Destination address: The address of the host or network. X You can learn these two external routes. If the local end has this feature enabled, the next-hop device does not support CDP , then switch to the next next-hop . If there is no next-hop , skip the PBR. Image *> 2001:12::/64 Interface fastEthernet 0/0 ipv6 ospf 1 area 0 Router(config-if)# ipv6 router isis Ipv6 address 2001::FFFE/64 no ipv6 nd suppress-ra Ipv6 enable 2 : Reponse message, send all or part of its routing information, in a Response message R1 , R2 , and R3 run RIP and only announce the direct link between the three. In R1 the ip default-network 172.16.0.0 172.16.10.1 , in fact, this IP may be understood as 172.16.0.0/16 within the network, but also in 172.16.10.0/24 within the network, of course, here we can see it, then who is more accurate? It is clear that 172.16.10.0/24 is more accurate, we say that its matching length is longer than 172.16.0.0 . Redistribute bgp 234 STALE Basic knowledge Ipv6 address FE80::FFFF:FE10:6 link-local ipv6 router isis Ipv6 enable If the packets of the same data stream are sent in different paths, the IP packets may need to be re-queued when they reach the destination. This may reduce the forwarding performance of traffic such as VoIP , or if the packets arrive out of order, the quality of service will be degraded, packets may be discarded, and delay jitter will be added. The IPv6 data of the 6to4 network can be forwarded by obtaining the corresponding public network IPv4 address from the destination IPv6 address . However, if the IPv6 island is not using the 6to4 address space, but a regular aggregatable global unicast address like 2001::/16 ? This requires the use of 6to4 relay. !! is a pool reserved for NAT-PT Ipv6 route 2002::/16 Tunnel0 ISATAP tunnel Because IS-IS runs on top of the data link layer, that is, it runs on top of the link layer protocol and requires CLNP support. Therefore, IPv6 IS-IS cannot be used on a remote IPv6 network connected through a tunnel . Configuring a tunnel is a static IPv6 over IPv4 tunnel. Ipv6 enable Hop-by- hop option header Hop-by-Hop Options Header (Protocol 0 ) Note that the IPv4 prefix 192.88.99.0/24 here should be published to the routing protocol on the IPv4 Internet. Otherwise this 6to4 relay using the anycast prefix is unreachable in the IPv4 Internet. Ipv6 unicast-routing *Mar 1 00:11:48.023: ICMP: echo reply rcvd, src 2.2.2.2, dst 192.168.123.3 Ipv6 rip RIPprocess default-information originate Network 3.3.3.3 0.0.0.0 area 0 Loopback address 2.0 and 3.0 . Now we can by R2 deployment of a distribution list on the distribute-List , so that R2 update to R1 filter out routing information in Let's take a brief look at the most basic tunneling techniques to connect IPv6 islands in an IPv4 network : No shutdown 43200 43200 Interface FastEthernet0/0 ? Image Address family identifier. When the value is 2 , it indicates the IP protocol. 2000 – 3FFF The direct result of this command is that the metric of 192.168.12.0 in R3's original routing table is 30720 , but now it is 10000 , which becomes 40720 . We see that after the offset command is configured , what actually changes is the DLY that is updated to the neighbor . Because it is true that DLY is the best, the default The mask of the destination address. Access-list 1 permit 202.101.100.0 0.0.0.255 RIP Version 2 Carrying Additional Information Image Hex Image ! Multicast capability 1/64 Ipv6 router isis A few notes: FE80:: 5EFE:202:202 2001:1111:: 5EFE:202:202 Tag 1111, type extern 2, forward metric 64 Image At this point, take a closer look at R1 : Let's take a look at PE1 : Ipv6 address 2001:0001::FFFF/64 ipv6 rip RIPprocess enable Image 0000: Add a 32- bit IPv4 address after 5EFE . As shown in the following figure, if the IPv4 address (for tunneling) configured for the ISATAP router is 2.2.2.2 , the interface identifier of the ISATAP tunnel is: Ipv6 route 2002::/16 tunnel1 FF01::1 ; FF02::1 ! Redistribute rip metric 10 subnets distribute-list 1 out rip Ipv6 unicast-routing interface Loopback0 The linklocal address is only valid within the link range, so you need to specify the local interface to which this linklocal neighbor address is connected . Modify the AD value of EIGRP Border Gateway Protocol (BGP) Connected Now, let’s go to R1 again. No passive-interface fast 0/24 [Experiment 7 ] There are subnet routes (no match); there are default routes IS-IS Level-1 Link State Database: Image Delete all settings that the user has configured. The default settings will not take effect until you need to restart your computer PMTUD FastEthernet0/0 is up, line protocol is up Ipv6 rip RIPprocess enable 2001: 5555::5/128 Match tag matches based on the tag of the route Interface Tunnel0 ipv6 enable Image Image Address-family ipv6 If the RA packet contains authentication information, then the authentication is correct Both Ipv6 nat v4v6 source 202.101.100.2 2001:2::2 Tunnel mode gre ip tunnel source serial 0/0 Image Experimental phenomena: Image The TAG field ( 32bits ) is only present in the external LSA . Ipv6 unicast-routing Internal BGP Set interface specifies how to send such a packet set ip default next-hop specifies the next hop to be forwarded set ip next-hop specifies the next hop to forward If the local end has this feature enabled, the next-hop device does not support CDP , then switch to the next next-hop . If there is no next-hop , skip the PBR. Image IPv6 packets are carried over IPv4 packets. Device automatically, without human intervention, the interface of the MAC to obtain address conversion 64bits the EUI-64 format of the interface ID process are as follows: Experimental phenomena: Here to add a sentence, since attention to traffic, we must pay attention to the round trip of traffic,ccna exam simulator, in general, we want 1.1.1.0 access 3.3.3.0 traffic to go ADC , then round-trip traffic generally requires a consistent path. That 3.3.3.0 to 1.1.1.0 data to a CDA , so to further D on the update to the C of 1.1.1.0 route of metric plus 1 jump. Image The configuration of R3 is as follows: Distribute-list prefix-list test out serial 0/0 IS-IS Ipv6 address 2001::FFFE/64 ipv6 nd other-config-flag ipv6 nd managed-config-flag We can use the ip route-cache command , is enabled on the interface fast switching show ip cache to check the fast switching -related information . Image The default keyword has a lower priority than the detail route. Neighbor 2001::1 next-hop-self Default route Ip cef Routing time: The time elapsed since the last time the routing entry was modified. The routing time is reset to 0 each time the routing entry is modified . Pop tag [Experiment 2 ] There are subnet routes (match); there are default routes, subnet routes Of course, on R3 , the same effect can be achieved with the distribution list in the in direction. The configuration of R2 is added as follows: // Old prefix Ip route 100.0.0.0 255.0.0.0 null0 IPv4-Mapped NAT-PT Interface FastEthernet0/0 Packet-based load balancing and process switching. Process exchange is for each packet , the router must perform routing table query and interface selection , and then query the data link information. Because each process that determines the routing of packets is independent of each other , all packets destined for the same target network are not forced to use the same interface. In order to open the process exchange function on the interface , you can use the command no ip route-cache under the interface . For IPv6 nothing needs to be done , because by default the feature is turned on.