ccna exam paper

ccna exam paper

Redistribution will only perform re-release actions on routes in the routing table. Image RFC1723 defines several compatibility switches External BGP 16 bits Loopback Loopback interface IP protocol number 88 Announce IPv6 prefix on CISCO IOS router Mpls ip Match length matches according to the third layer length of the packet !! Define RT value in IPv6 address family Image Route-map OSPF3to2 permit 20 match tag 20 Via FE80::5C10:8CFF:FEE0:FE89, Serial0/0 If the feature is not enabled on the local end, the data packet is either routed successfully or never routed out (discarded). OSPF V2 has similarities with V3 : After the command is configured, the neighbor R2 receives the prefix and displays the following: R2#sh ipv int f 0/0 The configuration of R1 is as follows: Interface Loopback0 ipv6 enable When 10.1.1.2 is reachable, the track object is true The simple horizontally separated rule is that the update message sent from an interface does not contain the network contained in the update received from the interface. In other words, the route I received from this interface will not be from this interface. Send it back. 6PE : 6PE technology relies on BGP , BGP 's Peer is the need to manually specify, it can be regarded as a semi-automatic tunneling technology. NAT (Network Address Translation) Image Image Neighbor 2001::1 next-hop-self Mpls ip This technology is used less and is one of the first conversion mechanisms of the IETF . The automatic IPv4- compatible tunneling mechanism allows only IPv6 data between two dual-stack hosts to be automatically tunneled (without manual configuration) over the IPv4 network. This mechanism allows for isolated hosts and another on an IPv4 network Use CDP to detect next-hop IP reachability in PBR environment (without optional parameters) Therefore, when CE1 accesses 2001:5555::5 from the source 2001:1111::1 , the data level is like this: Image The simple horizontally separated rule is that the update message sent from an interface does not contain the network contained in the update received from the interface. In other words, the route I received from this interface will not be from this interface. Send it back. Experiment 1 0400 – 05FF Do the following configuration on R2 and test it ( all tested in no ip classless and closed ip cef environment ): PE1#show bgp ipv6 unicast labels Router(config-if)#ipv6 adress 2001::1/64 !! Configure an IPv6 address FastEthernet1/0 FastEthernet0/0 Image RIP defines two types of request messages and response messages. 192.168.1.0/24 , RIP only declared the direct link (without having to declare that in the process the Loopback ), the R1 on ip defaut-network Bgp router-id 3.3.3.3 Transition from the old routing protocol to the new routing protocol Image Interface Serial0/0 Prefix readdressing Both of the above commands can be used to adjust the management distance of the routing protocol. The first command, distance ad ip-src , can adjust the management distance for a specific routing update source and a specific routing prefix. For example, I will use an OSPF. Some routes sent to me by the neighbor, the AD value is adjusted to 130 . Ipv6 unicast-routing Exit Image !! Activate the IPv6 address family with PE2 Wherein 33: 33: FF: 01: 00: 0B is ipv6 destination address FF02 :: 1: FF01: B multicast mapping. Image The packet contains a maximum of 25 routing entries. When we configure the ISATAP router on the host (pointing to the IPv4 address of the ISATAP router ), the ISATAP host starts sending RS messages to the ISATAP router , as shown below: Mechanism introduction RFC1722 Passive-interface defualt lab environment Image Router(config)#ipv6 unicast-routing Router(config)#intertface f0/1 I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary Image Net 49.0001.0000.0000.0001.00 The configuration of R3 is similar; R2 only needs to configure the interface IP ; PC1 and PC2 are each equipped with an IPv6 address, which means the gateway can be. Router redirection 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 . Next Hop 2023::3 Ip route 1.1.1.0 255.255.255.0 serial 0/0 ! Experiment 3 State Changed: 00:11:03 Format: Phase V In the Probe state, every unicast NS is sent every RetransTime ( r default 1S ) , and MAX_Unicast_Solicit is sent before waiting for RetransTimer . Basic configuration example But on R1 : The IPv4 and IPv6 address plans are as shown in the figure above. 2001:12::/64 Le le-value ! Let's look at the above example. For an IPv6 single-protocol network, first of all, it has the need to access the IPv6 Internet. Therefore,ccna exam paper, the default IPv6 traffic is all handed over to R1 . In addition, it may have the need to access the IPv4 Internet. In this case, it is necessary. by R2 this NAT-PT device. This NAT-PT device must first be a dual stack, and secondly it can convert traffic from an IPv6 network into IPv4 traffic and put it into a V4 network, and vice versa.