ccna routing & switching

ccna routing & switching

No bgp default ipv4-unicast neighbor 4.4.4.4 remote-as 234 Traffic generated in the IPv6 single-protocol network, destined for 2001:2::/96 , is routed to R2, which is the NAT-PT device, and then the IPv6 address in the packet is converted to an IPv4 address and transmitted to IPv4. IPv4 single protocol node in the Internet . --- Set ip next-hop 10.2.2.2 !! ipv6 routing, all traffic to the IPv6 network is thrown into the tunnel Multilink Multilink-group interface Wherein, R2 back to R1 of ICMPv6 error message is as follows: If no conflict is detected after 1S , A will send a non-solicited advertisement (an NA message), announcing that I will officially use this IPv6 address. Ethernet 16 bits The default is 6 update cycles, which is 180s . The route entry tag when an entry with a larger hop count is received If the prefix does not match any entry in the prefix list, it will be rejected Match ip address 1 set metric 10 OR2 configuration Image Ipv6 dhcp client pd test [Start process exchange] !! This IPv4 address is the destination address of the ISATAP tunnel ! Request the entire routing table: The request message contains a single route with an address family identifier field of 0 (address 0.0.0.0 ) and a metric of 16. The device receiving the request will unicast it back to the requesting address. The entire routing table. The ISATAP host can construct an IPv6 address based on this prefix and its own interface identifier . Area 1 range 2001:1::/32 Ip address 10.1.12.1 255.255.255.0 Further, it is found that P is 430.4.4.4 , the label 301 is allocated . Therefore, when PE1 receives the data packet and goes to 2001:5555::5 , the data packet is pressed into two layers, and the outer label value is 301 , the inner label value is 403 . Network 192.168.254.0 0.0.0.255 area 1 Isis circuit-type level-1 Ipv6 nat Fast Switching There are some other messages, which are described below. Longest matching principle Image Experiment 3 Unassigned ! Ipv6 address 2001:12::1/64 Neighbor 2023::3 remote-as 300 address-family ipv6 Ipv6 address 2004:1:1::1/64 ipv6 address 2004:1:2::1/64 The router performs the next IPv6 forwarding by the router . Image 12 Associate the static route of the next hop As can be seen, PEl and 4.4.4.4 of PE2 between having IPv6 MPLS label distribution and distribution capabilities. Image IPv6 routing The data is two-way. When considering traffic, pay attention to the round trip of traffic. Experimental example: Called when republishing Image Route-map test permit 20 router ospf 1 ! But you need to pay special attention to the reachability of next-hop . 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: ! Address structure 8 bits ! !! Do not activate RIP , but use re-release Request message: You can request the entire routing table or request specific routing information. Ipv6 address 2001:1::FFFF/64 ipv6 nat First, in order to avoid the suboptimal path problem, we use the distribution list in the in direction on R2 and R3 to filter out 1.1.1.0 . Access-list 1 permit 192.168.12.0 router rip R1(config-route-map)# match ip address prefix-list list1 Ip nat inside source route-map nat4 interface serial0/0 overload The IPv6 address used by the automatic IPv4 compatible tunneling mechanism is " IPv4- compatible IPv6 address". Image E000 – EFFF After R2 show run , I found: IPv6 addressing FastEthernet0/0 is up, line protocol is up 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 . Typical configuration example: Adding the default keyword will cause the interface to install a default route after getting the address through stateless autoconfiguration. Redistribute bgp 234 Bgp router-id 2.2.2.2 It is delivered to the ISATAP host, enabling it to build its own IPv6 address. Netsh interface ipv6 show interface Image R2(config-router)# distribute-list 1 in fa0/0 The problem that the static route associated with the outgoing interface is re-released. Image Async Async interface Allocation FastEthernet1/0 AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd Ipv6 router ospf 100 router-id 2.2.2.2 Configuration example R1 Therefore, when the route lookup mode of the router is classless or the classless route lookup mode, the default lookup action of the router is the longest match criterion. For example, in the above figure, when R3 receives a packet and goes to 172.16.1.1 , then in fact, 172.16.1.1 is "dropped" in the network of 172.16.1.0/24 and 172.16.0.0/16 , both seemingly Yes , but 172.16.1.0/24 obviously has a longer match, so the packet is eventually dropped to R1 . Similarly, if there is a data packet going to 172.16.2.1 ? Since the entry of 172.16.2.0/24 is the highest according to the longest match principle,ccna routing & switching, the data is thrown to R2 .