ccnp troubleshooting official certification guide

ccnp troubleshooting official certification guide

Neighbor Second layer bundling 1000 If there is an EBGP connection between R2 , then a routing loop occurs, and R1 and R2 will receive the summary route and accept the routing update. This is because this summary route does not carry any information about AS100 and AS200 . : Enabled 0 00:11:53 Milne 's packet was sent to Roo because he learned the wrong one. The default violation is shutdown . If it is protect , then the penalty will be gentle, for illegal data frames (such as the source of the data frame) The client ( D ) passed to it by the RR is not passed to the non- client (E) By default, BGP does not allow static default routes to be injected when static is re-released ; unless it is in the BGP process at the same time default-information originate In addition to matching 100 to 106 outside the AS_PATH The AVG is responsible for responding to the ARP request of the PC to the gateway , while the AVG is responsible for the allocation of the virtual MAC . AVG can be flexible depending on the load balancing mode PC 's ARP request response. R2 RIPv2 Weight !! Match the exit of the packet MED does not inherit meaning Address-family ipv4 unicast Passive-interface Switched network management Routing Feedback (feedback) is a re-release in the deployment of routing requires a great attention to the phenomenon. As shown above, R5 will <1-99> Community list number (standard) If you want to modify the weight , let R4 go to 100.0.1.0 and go to R3 to go to 100.0.2.0 and go to R5 ? Then the configuration is modified as follows: Load balancing methods At this time , OSPF routes are re-advertised to BGP on R11 , so that R12 can learn. After R12 learns the route, it finds that BGP attributes (including AS_PATH ) are lost. Because OSPF redistributed into BGP , the default does not automatically tag values are copied into the AS_PATH ,ccnp troubleshooting official certification guide, the need to R11 on Neighbor 10.1.23.3 send-community neighbor 10.1.23.3 route-map test out Ip dhcp relay information trusted The ETHERNET_SNAP standard was developed by the IEEE 802.1 committee to ensure interoperability between IEEE 802.3 LAN and Ethernet. Track 2 rtr 2 reachability The configuration of R2 is as follows: Ip sla monitor 1 Virtual-PPP Virtual PPP interface Once the bridge is aware of a topology change in the network, it will send a configuration BPDU with the TC set , and each switch in the network will pass these set BPDUs , which will make each individual bridge aware. To the case of topology changes. Ip prefix-list 11 deny 12.12.12.0/24 ip prefix-list 11 permit 0.0.0.0/0 le 32 router bgp 100 Authentication Type When the route-map is executed, the match statement contained in the policy-list called by it will be traversed and the match action will be executed . When a data frame is sent from the Access port, the switch strips the VLAN tag of the frame and then sends it out. Route-map can be used in different commands for specific purposes Show tcp bri Neighbor 3.3.3.3 update-source Loopback0 neighbor 5.5.5.5 remote-as 64513 Show ip dhcp database Displays recent activity on the DHCP database Verify the role of the match interface 1 Of course, this time 1.1.1.0 is unable to access 3.3.3.0 , because R3 does not have a route in the RIP routing domain (that is, there is a problem with the backhaul routing, data communication must always consider the round-trip path, remember), so if To achieve network-wide interworking, you need to be on R2 : Service dhcp Ip dhcp snooping information option allow-untrusted After the DAI is enabled, if the downlink PC sends a large number of invalid ARPs in a period of time , it may cause a large loss of switch performance, that is, A BGP neighbor has an impact only on the router. It can be understood as a weight value. The larger the priority, the higher. The value is in the range 0-65535 . Reset BGP connection Redistribute local direct connection network segment into BGP , MED value is 0 ; redistribute local static route into BGP , MED value is 0 Metric Bgp inject-map map1 exist-map map2 [copy attributes] Set community none router bgp 3 When configuring the reflector, the client- to- client reflection is enabled by default, but if the client is fully interconnected, this command adds no to turn off the reflection between the clients. 0 7 15 31 You can learn these two external routes. Ip dhcp pool vlan10 network 192.168.10.0 /24 Note that if you attempt this time SW2 on F0 / 2 interface priority piecemeal, and it is useless, because the port is looking at the sender ID . So if on SW1 , the port priority of F0/2 is reduced. Then on SW2 , F0/2 will win as the root port. Update-source Corresponding hwidb fast_if_number 4 Corresponding hwidb firstsw->if_number 4 Internet address is 10.1.12.2/24 {100,200} i Note that the relay device needs to enable the DHCP service: service dhcp After receiving the BPDU packet, the interface will immediately switch to the err-disable state. MAC address Fa0/22 desirable n-isl trunking 1 If BGP routes are passed from EBGP peers Set ip next-hop verify-availability 10.1.1.2 10 track 1 5.5.5.5 1 AS_Path !! Match the exit of the packet Network 100.0.2.0 mask 255.255.255.0 No shutdown exit Manually modified. Ip mtu refers to the maximum value of the ip message. Route-map BGP2OSPF permit 20 match ip address 2 200 Note that PEs in an MPLS VPN environment do not have this limitation. The route to the nearest BGP NEXT_HOP route is the route with the smallest IGP metric to the next hop router. After the basic configuration is completed, the BGP table of R4 is as follows: Ip prefix-list 1 seq 5 permit 100.0.1.0/24 ip prefix-list 2 seq 5 permit 100.0.2.0/24 route-map test permit 10 Dynamic Host Configuration Protocol Route-map first acquaintance Internal 0 packets, 0 bytes AS does not compare the MED values. In other words, for multiple paths, the MED is compared only if the first AS in AS_SEQUENCE is the same ; any leading AS_CONFED_SEQUENCE will be ignored. MED only affects traffic between directly connected autonomous systems, and does not pass across ASs. Standard ACL Match the AS_PATH that does not contain any AS number , that is , the route in the AS . 2.0 and 3.0 . Now we can by R2 deployment of a distribution list on the distribute-List , so that R2 update to R1 filter out routing information in The following priorities are reduced in order: default-originate (for each neighbor configuration), default-information-originate (for each address cluster configuration), network , redistribute , aggregate-address Configuration example 46 Origin IGP, metric 0, localpref 100, valid, external, multipath , best MED setting method : Any The frame structure formed by the MAC sublayer is mentioned in the introduction above , including IEEE802.3 frames and ETHERNET_II frames. ORF If DHCP snooping is turned off or this is a DHCP- free network environment, such as a pure static IP address environment, use ARP STP requires network devices to exchange messages to detect bridged loops. This message is called the bridge protocol data unit BPDU. The blocked port also receives BPDUs continuously to ensure that a new STP can still be calculated when the fault occurs . To understand the working process of STP , it is very important to understand the meaning of the fields in the BPDU , because these are the root of the work STP relies on.