ccna video

ccna video

Tunnel mode ipv6ip 6to4 interface fast1/0 Garbage colletion/flush timer <0-4294967295> 32-bit tag value The TAG field ( 32bits ) is only present in the external LSA . Ipv6 nat Y Ipv6 unicast-routing Image Interface Serial0/0 ipv6 enable Image Image Route-map PBR permit 20 match ip address 2 1000 – 1FFF Ipv6 router ospf 1 router-id 2.2.2.2 Image R4#show ipv6 route ospf Router bgp 12 If this command is configured, the host needs to use dhcp to configure other information besides the ipv6 address, such as DNS , domain name or something. The range of prefixes to match, ranging from ge-value to 32 The lifetime of the RA message, the default is 1800s. OSPF , but R3 ignores this route (locally configured with a static summary route pointing to null0 ), although the LSA is still passed to R5 , which means that although R5 still has a 1.0.0.0/8 route, the packet After being thrown to R3 , it is finally discarded at R3 , so there is still a problem here. In the figure above, the first two packets are the two fragments of the ICMPv6 message sent by R1 to R4 , and the third message is the reply package of R4 . The configuration of R1 is as follows: Image 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 Image Ipv6 address 2001:1::FFFF/64 ipv6 nat Segment header Fragment Header (Protocol 44 ) Under normal circumstances, the data is preferred to go ip next-hop , that is, go ISP2 BGP Image The so-called seed metric refers to when I use a route to re-publish from an external routing protocol to this routing protocol, if the metric of the route is not manually specified , the default metric is used . Look at the following table (the following table is a recognized default value that can be modified using the default-metric in the routing process ): Ip address 10.1.12.1 255.255.255.0 Router-id 4.4.4.4 redistribute connected exit E.g: Neighbor FE80::CE01:8FF:FED8:10 password cisco neighbor FE80::CE01:8FF:FED8:10 activate redistribute connected route-map test RIP Version 2 Carrying Additional Information IPv4 Stack Dual Stack 0600 – 07FF Image Router rip Do not send full router address in prefix advert Stateful autoconfiguration Image Policy-based Routing ( PBR ) Policy Routing 4 Routing? The key point is that R2 , through the R2 deployment redistributed routing , routing information may be selected in different transmission routes between the domains. 4 100 F000 – F7FF Route-target export 234:4 0600 – 07FF Route-map first acquaintance Router ospf 100 Experimental needs Manual configuration Via FE80::FFFF:FE10:5, Serial0/0 OI 2001:1:2::1/128 [110/192] Ipv6 address 2001:12::2/64 Adjust the parameters of the NDP message We spotted FIG, R1 and R2 between runs RIP to exchange routing information, R2 by RIP learned the R1 release over 192.168.1.0/24 and 2.0 / 24 routing information loaded into the routing table,ccna video, labeled R & lt . While R2 and R3 and running OSPF , establish OSPF adjacency, R2 also from R3 , by OSPF learned the two routes: 3.0 and 4.0 / 24 , is also loaded into the routing table, labeled O . So, for R2 , it has its own route to the whole network, but inside R2 , we can understand this image: it will not change the route learned from RIP .The OSPF route is told to R3 , and the route learned from OSPF is not sent to R1 as a RIP route . For R2 , although there is complete routing information in its own routing table, it is as if there is a gap between the entries of R and O , which cannot be exceeded.