ccnp route netacad

ccnp route netacad

Below is an example: When 10.1.1.2 is reachable, the track object is true When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 8 bits : Enabled Router ospf1 The SYSID can also be used as an identifier for a VLAN or an MST instance. For example , the system ID extension of VLAN 100 is 100. Interface loopback2 Weight Therefore, BGP automatically summarize ( Auto-the Summary ) Summary Only redistributed redistributed routes, and the use of network command routing incoming class declaration ways. Currently CISCO IOS turns off automatic summarization by default. It can still be saved after the up/down phenomenon occurs. After using wr , these sticky secure addresses will be written to start-up config and will not be lost even if the device is rebooted. Option 82 sub-option 2 : Remote ID , which is generally the MAC of the access layer switch that inserts the option 82 information . When ISP1 is down, and the GW does not detect it (that is , the interface of GW connected to ISP1 is not DOWN ), the traffic of PC access 100 is still thrown to ISP1 , which is disconnected. MacAddress Modify the default AD value of BGP . The command is as follows: * i100.0.1.0/24 2. Pass the RIP update with an unnumbered address ( invalid source ) <1-4294967295> community number Note that there must be three layers between the DHCP server and the trunk interface. Because the unicast packet is relayed, the source address is the trunk interface configured with ip helper-address . Therefore,ccnp route netacad, when the DHCP server returns the packet, the destination IP address of the packet. This is the interface IP of the interface configured with ip helper-address . 5.5.5.5 Related points 51 Route-map cisco permit 20 match ip address 2 set metric 20 basic concept At the same time in the out direction, there is no problem. ? The IP header is 20 bytes, the ICMP header is 8 bytes, and the ICMP data payload is 1472 bytes, which is exactly 1500 bytes. Therefore, on the CISCO IOS device, the size followed by the ping refers to the entire size of the outgoing IP packet. ARP packets are detected and released directly. For untrusted interfaces, ARP packet after receiving back checks only legitimate ARP packets can not be released, if the emergence of illegal ARP packets, it will be log , while discarding. Authenticate The election of the Root Bridge will not be said. When LINK1 DOWN is dropped, SW2 will not receive the BPDU from ROOT , so it considers its root and starts to SW3. The default is shutdown , optional protect , restrict Site-level site identification: Identify the various sites on the network at the data link layer. 1 . Enable DHCP snooping on SW1 without going to no ip dhcp snooping information option , which is to insert option82 . The configuration of other devices is the same as the previous experiment. It is found that the PC cannot obtain the address . The debug message will be found on the gateway device, that is , debug on SW2 : relay information option exists, but giaddr is zero . The giaddr field means the IP address of the first DHCP relay agent that the message passed .