cisco ccna braindumps

cisco ccna braindumps

12 Situation 1 Image BGP metric is set to IGP metric Therefore, from here we can see that the route summary is a risk of looping. One way to solve the above problem is to add a static route on the Layer 3 switch: ip route 192.168.0.0 255.255.0.0 null 0 , this way, when it receives access ...... 32768 Image Network 192.168.23.2 0.0.0.0 area 0 distribute-list route-map test in Command The longest match principle is the default route lookup method for CISCO IOS routers. When the router receives an IP packet, it performs bit-bit bit-by -bit lookup between the destination IP address of the packet and the entry in its local routing table until the longest matching entry is found. This is called the longest match. in principle. IPv6 host ( xp system ie6.0 ) accesses IPv6 WEB site twenty two Image Origin codes: i - IGP, e - EGP, ? - incomplete Complete the construction of the environment and the basic configuration of the device to ensure the interconnection of the entire network. Y 2.2.2.2/32, version 55, epoch 0, per-destination sharing 0 packets, 0 bytes Implementation of two-point bidirectional routing re-release Abbreviation of IPv6 address So how do you perform an accurate calculation of the summary route ? Let's look at an example: Configuration example Matching with the detailed route 172.16.32.0/24 , so eventually these two routes will be filtered out, which is inconsistent with our needs. In fact, this is the drawback of using a standard ACL to match the route, you can only match the network number of the route, and can not further match the prefix of the route. The configuration of R2 is as follows: Image 192.168.12.2/24 Ipv6 enable At this point , the route 1.1.1.0 is seen on R3 , which contains the next hop attribute, and the previous one. I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea,cisco ccna braindumps, IS - ISIS summary Application example The configuration of R4 is as follows: Hex Image One of the ideal solutions is to transform the network topology: Prefix-delegation pool dhcppool lifetime 1800 600 R3 sets the tag when injecting the route. Access-list 1 permit 1.1.1.0 Route-target export 234:2 Neighbor FE80::CE02:8FF:FED8:0 activate 1/64 Specify a smaller MTU=1400 in the ICMPv6 message. The configuration of PE1 is as follows: Image First of all, the route-map is a very important tool, and it is used in a wide range. When defining a route-map , we use the route-map keyword to associate a custom parameter, such as test . A route-map list by the test string unified representation, you may be in one route-map define a plurality of sequences, a sequence number to a decimal representation, such as the figure above, 10 , Configure OSPF unicast updates: ! None Metric ! You can view the parameters of the IPv6 configuration. IS-IS Level-1 LSP R4.00-00 !! Modify RIPng management distance, default 120 Ip route 0.0.0.0 0.0.0.0 10.1.12.2 Difficult analysis Image Requested node multicast address corresponding to each unicast and anycast address used Ip address 2.2.2.2 255.255.255.255 BGP metric is set to IGP metric Set ip next-hop { ip-address [...ip-address] | recursive ip-address } Tunnel mode ipv6ip Mpls ip Exit-address-family Then start configuring BGP4+ : RFC2082 Untagged The above-mentioned IPv4 address is IPv6 public address isolated site, in the IPv6 / IPv4 border router ( 6to4 configure the router) V4 addresses may be directly 6to4 router interface connected to the public network the IP , may be a 6to4 router Loopback Interface the IP , the IP is also the 6to4 tunnel of source or Where do you want . FE80::CE01:CFF:FEF0:0 4 TCP/IP volume one RIP-1 compatibility RIPv2 sends updates in the form of broadcasts, enabling V1 to receive Tag or VC !! This must be knocked ! Static route associated with the outbound interface 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. Isis circuit-type level-2-only Image ! Ip prefix-list ABC seq 5 permit 0.0.0.0/0 le 32 Netsh interface ipv6 add address 21 3ffe::1 unicast !! Assuming that the interface index number to be configured is 21 , this command configures an IPv6 unicast address for the interface . Se0/1 Image Interface fa1/0 Ipv6 enable The configuration of R2 is added as follows: Ip prefix-list ABC seq 5 permit 172.0.0.0/8 le 24 (Update source verification failed), on the other hand, R2 will not receive the 1.1.1.0 route from R1 , and then pass the same interface, with 11.1.123.2 Next Hop Address-family ipv6 IP protocol number 89 20 Access-list 1 permit 192.168.12.0 router rip As defined in RFC3053 , a tunneling agent is an external system, not a router. It acts as a server in an IPv4 network and accepts tunnel requests from dual-stack nodes. Image Image Ipv6 address 2001:12::1/64 R2 RIPv2 Ipv6 enable Authentication is identified by setting the address family ID field to all 1s ( 0xFFFF ). !! Let R1 generate a packet with a message size of 1500 and send it to R4. Ping IPv6Address [% ZoneID ] Access-list 1 permit 1.1.1.0 Image R2 's F0/0 port is configured with proxy ARP , 3.3.3.0 network R2 itself is reachable, so R2 will respond to this ARP request with its own F0/0 port MAC . In fact, this is an ARP spoofing behavior: ) In the above circumvention scheme, we use ACL to match the route directly , and then call it in the distribution list. This method is not scalable. If there are too many routing entries re-advertised into OSPF , the ACL entry will be crazy. So we try to have a method with a more scalable, for example, in R3 on the RIP redistributed into OSPF , when injected into the route marked Tag , then what in R2 when on deployment distribution list, you You can associate a route-map to "crawl" these routes with tags .