ccna brain dumps best

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Interface FastEthernet0/0 Ipv6 address FE80::FFFF:FE10:3 link-local ipv6 router isis Interface FastEthernet0/0 vrf forwarding cisco ipv6 enable One thing to note is that if this 6to4 relay router is "far away" from your network, this may cause poor IPv6 traffic between you and the IPv6 Internet . To help a 6to4 site find available 6to4 relays on the Internet and give the 6to4 mechanism more scalability, RFC3068 introduces an arbitrary broadcast prefix. Such 6to4 packets can be automatically routed to the nearest IPv4 Internet. The configuration of R3 is similar, except that the destination of the tunnel interface can be modified. The configuration of R2 is as follows: Redistribute rip subnets tag 1111 The TAG field ( 32bits ) is only present in the external LSA . Other orders Ipv6 unicast-routing Interface tunnel 0 Policy-based Routing ( PBR ) Policy Routing Image We noticed that for the tunnel configuration, you need to develop the tunnel 's destination . In this way, if there are many tunnels,ccna brain dumps best, this configuration becomes very cumbersome and the scalability is too poor. Therefore, we have another mechanism: 6to4 automatic tunnel. ICMPv6 is one of the basic protocols of IPv6 . Protocol number 58 , which is in the "Next Header" field of the IPv6 header. Note: If it is an EIGRP environment, you need to implement unicast update, then the route update interface can not be PASSIVE (this is different from RIP ), directly use the neighbor command to specify the neighbor. If the interface is PASSIVE , even if the neighbor is manually specified , the EIGRP neighbor relationship cannot be established normally . ! No bgp default ipv4-unicast neighbor 4.4.4.4 remote-as 234 Now, let’s go to R1 again. Neighbor 2023::2 activate exit-address-family Users in the IPv4 single protocol network know that they can access it in the way of 202.101.100.100 . SMTP sends an email to this mail server. Of course, B can use the IPV4 session to read. Automatic tunneling technology: 6to4 tunnel, IPv4- compatible IPv6 automatic tunnel, ISATAP tunnel Aggregate R2 re-advertises the A route, then according to the preemptive rule, R3 will ignore the R1 update about the A route. At the same time, due to the deployment of two-way re-release, R3 will further re-publish the learned A- route back to process 1 . 16 bits Set the outgoing interface of the data Therefore, in the case of dual stack, when the PC DNS is parsed, the AAAA record is generally requested first . Route-map test permit 10 RPF nbr: FE80::CE02:1BFF:FE54:0 ! Now do a test, R1 on the ping www.ccietea.com , we will find: tie. When B accesses the IPv6 network, the IPv6 address can be taken from the pool . In addition, in order to allow V4 network access V6 network has goals, but also made a static mapping, the 2001: 1 :: 1 mapped to 202.101.100.111 , so, B will be able to use 202.101.100.111 This IP to access IPv6 hosts A . Network 3.3.3.3 0.0.0.0 area 0 Switchport access vlan 10 interface fast0/15 Default seed metric If the feature is not enabled on the local end, the data packet is either routed successfully or never routed out (discarded). Fa0/0 No bgp default ipv4-unicast bgp log-neighbor-changes !! Re-emphasize the necessity of the next few orders The neighbor request has been sent to the destination node's request multicast address, but no neighbor notification has been received. Ipv6 ospf 1 area 0 [Test 3 ] R2 # x client host ! The above command is to create an address pool for v6tov4 . This address pool is of course an IPv4 address pool. When an IPv6 only user, such as A, wants to access an IPv4 only network, it takes an idle IPv4 address from the pool. . ! Routing Header Routing Pointer (Protocol 63 ) Ip address 10.1.23.3 255.255.255.0 None Policy-based routing is more powerful and flexible than traditional routing. It allows network managers to select forwarding paths based on destination addresses and packet types, packet sizes, applications, or IP source addresses. ! Image 3.3.3.3/32 When the router is in the boot mode and the software is upgraded, the ip routing is also closed, so the command will be used when necessary. Ipv6 access-list v4map permit 2001:1::/64 2001:2::/96 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.