pass4sure ccna

pass4sure ccna

TCP Ipv6 enable Image Gateway (default route) Interface Serial0/0 ipv6 enable Y Ipv6 router rip RIPprocess exit OR1 configuration Ip sla monitor schedule 1 life forever start-time now Router redirection Ipv6 address 2012::2/64 ipv6 nd suppress-ra Image or ! Image C 192.168.12.0/24 is directly connected, Serial0/0 1.0.0.0/24 is subnetted, 1 subnets Ipv6 enable Ipv6 address 2001:12::2/64 interface Serial0/1 * 0x0000000B Exit BGP table version is 1, main routing table version 1 In general, the tunnel agent and the dual stack Router belong to the same management party, such as the same company. Because the tunnel agent has the configuration permission of the dual stack Router . An address is called a "tentative address " before the duplicate address detection ( DAD ) , and the address is tested. The interface is temporarily unable to use this trial address for normal unicast communication, but will join the Solicited-Node multicast group corresponding to the tentative address . Interface fastEthernet 0/0 ipv6 ospf 1 area 0 The configuration of R2 is as follows: Set tag 10 For a class B address, the default subnet mask length for a class B address is 16 bits, so 172.16.0.0/16 itself is a primary class network number. As another example of a through, 10.1.12.0/24 , first 10 beginning, which is an A class address, A Class mask default address is 255.0.0.0 , so 10.1.12.0/24 its major network number is 10.0 .0.0/24 . Image 16 bits Interface fast0/0 Ipv6 enable IPv6 interface address: This TLV contains an IPv6 interface address ( 128bits ). The decimal value assigned to the IPv6 interface address TLV is 232. For IS HELLO PDUs , this TLV must contain the Linklocal address, but for LSPs , the TLV must contain a non- Linklocal address. Look at the above picture, the gray space 172.16.0.0/16 , this network number, we call the main class network number , the so-called main class network number,pass4sure ccna, meaning the network number, according to the IP address category to which it belongs , corresponding to The network number obtained after the default subnet mask length. Such as 172.16.0.0 this is a 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. ICMPv6 TYPE Configuration example Via FE80::FFFF:FE10:5, Serial0/0 11 !! core in the IGP Ipv6 address 2001:23::3/64 Ipv6 nat Ipv6 address 2000:12::2/64 ipv6 ospf network point-to-point ipv6 ospf 1 area 0 Set ip default next-hop 10.1.12.1 Access-list 1 permit 192.168.2.0 Do not advertise prefix Before we talk about are two IPv6 islands of use is 6to4 of IPv6 address space. The 6to4 border router is sent to receive Ipv6 address 2001:0001::FFFF/64 ipv6 rip RIPprocess enable OR2 , SW1 , and SW2 run OSPF , and OR2 acts as the egress router of the telecommunications, injecting a default route into the OSPF domain. OR1 will be local Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale RFC1724 X We see that the PC first generates an interface ID of 64 bits according to its locally configured IPv4 address: 1.1.1.1 : Transmit limit accumulator 0x0 (0x0) IP MTU 1500 Image Exit 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. Image Image IPv6 transition technology Ipv6 access-list v4map permit 2001:1::/64 2001:2::/96 Static route Interface FastEthernet1/0 In the above figure, we inject OSPF routes into RIP . Traditionally, you can only set metrics on all incoming routes . However, with route-map , we can associate a defined one when configuring re-issue commands. A good route-map , in the route-map , we can create different properties or actions for different routes by creating multiple serial number statements. Image The Linklocal address of the ISATAP virtual NIC . The destination address is the Linklocal address of the ISATAP router . Ip address 10.1.12.1 255.255.255.0 Interface Serial0/0 ipv6 enable Neighbor 2.2.2.2 send-community extended exit-address-family Set ip next-hop verify-availability 1 : Request message, requesting all or part of the routing information from the neighbor; Tunnel source serial 0/0 tunnel destination 10.1.23.3 !! Re-emphasize the necessity of the next few orders ! Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale Image Conduct a three-layer forwarding decision. The CEF table maintains core information extracted from the routing table, which is used to perform forwarding decisions on received messages, including IP prefixes, recursive next hop addresses, and outbound interfaces. An important feature of the CEF table is its ability to make immediate decisions about recursive prefixes. 8 bits When a node starts the IPv6 protocol stack, each interface of the node automatically configures a link-local address. This mechanism allows two IPv6 nodes connected to the same link to communicate without any configuration. The default gateway recommends using a link-local address because this address is the most stable. Ipv6 nat prefix 2001:2::/96 Foundation The behavior of the router is hop-by-hop. Each router along the path to the destination network must have a route to the destination. 0.0.0.0 . Used for automatic address configuration, neighbor discovery, router discovery, etc. Image !! The prefix of this IPv6 address will be advertised to the ISATAP host. In label/Out label No passive-interface fast 0/24 Turn off the router advertisement on the interface. By default, when the global command ipv6 unicast-routing is enabled, the Ethernet port of the CISCO device, Match metric matches the route with the specified metric. match route-type matches the specified type of route match community matches the BGP community. IP nodes can communicate, and communication is actually the process of data interaction. Data interaction requires network devices to help us transfer data between two communication nodes. When the router (or other Layer 3 device) receives an IP packet, the router will find out the purpose of the IP packet in the Layer 3 header. *Mar 1 00:11:47.887: ICMP: redirect rcvd from 192.168.123.1- for 2.2.2.2 use gw 192.168.123.2 Router(config-router)# distance eigrp internal-distance external-distance Update timer update timer In the figure above, we started the re-release action on R2 . We "inject" the OSPF route into the RIP process, so that Mpls ip Note that, in the filtering command is address-family ipv6 configured in Ip route 3.3.3.0 255.255.255.0 serial 0/1 So how do you perform an accurate calculation of the summary route ? Let's look at an example: http: // [ipv6 address ] : 8080 !! must use [] quotes OI 2001:1:1::1/128 [110/192] Neighbor 2023::3 activate Of course, if a PC is initialized, it can also actively send an RS request about the prefix information. The configuration of CE2 is as follows: Verify again, instead of detailed routing, use a summary route of ip route 10.0.0.0 255.0.0.0 , the next hop is R3 , the effect is the same as above, also take R3 . Therefore, as long as it is not the default route, as long as there is such a matching route in the routing table, the route is taken preferentially, and the route-map is taken without the route . L2 Milne 's packet was sent to Roo because he learned the wrong one. NS 135 BGP Router isis --- 202.101.100.2 R2(config)# access-list 1 deny 192.168.3.0 R2(config)# access-list 1 permit any R2(config)# router rip BGP table version is 1, local router ID is 1.1.1.1 Ipv6 address test ::FFFF/64 First, let's get a glimpse of route-map . Looking at the figure above, we redistribute OSPF routes into RIP on R2 . As mentioned above, when re-publishing, you can use the metric keyword to set the metric after the route is re-advertised into RIP . Set to 1 here . The immediate result is that all OSPF routes injected into RIP have a metric of 1 . So what if I want to make some flexibility adjustments? For example, I hope that after the route is injected into RIP , the metric of the 192.168.1.0 route is 1 and the metric of 2.0 is 2 . Traditional redistribution is impossible.