ccnp ospf troubleshooting

ccnp ospf troubleshooting

Define a maximum value: define the maximum number of hops 15 hops, 16 hops unreachable to avoid routing loops Sw(config-if)#switchport mode private-vlan host You can further configure this logical etherchannel interface. 1 None does not send updates ( passive ) summary: Neighbor 5.5.5.5 remote-as 345 The shorter the AS-Path, the higher the priority. ? 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. Create a secondary VLAN : Decision making Match tag matches based on the tag of the route 100 If the route is imported using the aggregate-address command, the MED is empty. 192.168.12.2/24 Router(config) router rip Initially, R3 can learn three loopback routes from R1 and 192.168.12.0/24 routes. Now we don't want R3 to learn the route to 192.168.3.0/24 ,ccnp ospf troubleshooting, then we can configure it on R2 as follows: Origin IGP, metric 0, localpref 100, valid, internal, best The connection is established in advance and the data is transmitted, and the reliability of the data is guaranteed during the transmission. Access-list 11 deny 192.168.1.0 BPDU packet Match ip address prefix-list 100 ? If there is an error, enter the OpenConfirm state. 10.1.13.1 802.3 uses the length field, but the Ethernet frame uses the type field to identify the protocol at the network layer. In an Ethernet II frame, a two-byte type field is used to identify the higher layer protocol contained in the data field, that is, this field tells the receiving device how to interpret the data field. Portfast,uplinkfast, backbonefast Ip policy route-map PBR Match metric matches the route with the specified metric. match route-type matches the specified type of route match community matches the BGP community. TRUNK 10.1.13.3 Switch(config)# vtp mode {server | client | transparent} DTP SW1 is an access layer switch. DHCP snooping is deployed and Fa0/24 is defined as a trust interface. ? Local origin Network 100.0.2.0 mask 255.255.255.0 neighbor 10.1.25.5 route-map test out Receiving behavior ! After 10.1.31.0 is passed to R2 , since R2 takes the mask of the receiving interface and finds that 10.1.31.0 has a position of 1 in the host part , the subnet is stored in the routing table and treated as a host route. : 10.1.31.0/32 Fa0/20 ? Paths: (2 available, best # 2, table Default-IP-Routing-Table) Flag: 0x820 LocPrf 100 i Trunks can be statically configured or negotiated through DTP . Ip prefix-list ABC seq 5 permit 172.0.0.0/8 Encapsulate the ISL header and the new FCS on the basis of the original data frame Regular expression example: Similarly, if ip route 3.3.3.0 255.255.255.0 null0 is the same. Directional strategy. Offset list Before the DAI is deployed , if the ARP spoofing behavior occurs on the intranet , for example, the PC sends an invalid ARP packet, the switch cannot detect and defend the defensive action. AS_CONFED_SET A list of unordered AS numbers on a path to a specific destination , using the method with AS_SET 10.1.13.1 Fa0/20 When the link between R1 and R3 fails, the same network will still have problems. Because R2 re-releases the locally configured static summary route into the Relevant points R3 and R4 , R4 and R5 establish IBGP neighbor relationships, and R3 R4 R5 uses LOOPBACK as the update source and refers to the neighbor . Router bgp 345 Access-list 1 deny 192.168.1.0 Private-vlan primary Length of the remote-ID type Major Points 1 100 Path control Ip route 172.16.3.0 255.255.255.0 172.16.12.3 Supplementary] When the same AS in the BGP router A introduces a route, A router transmitted the route to its IBGP neighbors B , has been The range is 1-255 Experimental description When the look-up table, the binary 0 , . 1 bits match, and for an exact match, i.e. purpose MAC and CAM table MAC needs Risk of routing policy configuration loss ( Optional non-transitive ) Ip prefix-list ABC seq 5 permit 172.0.0.0/8 ge 24 Send Keepalive bag PC1 to deceive PC2 , the package made by the tools, such as anysend like, send a ARP request broadcast, the ARP data of the Ethernet frame header, source MAC of PC1 of the MAC , the purpose of MAC full F. , The contents of that key ARP protocol packets Wen ( ARP body ), that is, after the contents of the data frame Ethernet frame header, this is the ARP real content, which may encompass the main elements are: the sender mac , sender IP , the recipient MAC and recipient IP . PC1 that issued ARP data frame, SENDER MAC for their MAC addresses, but SenderIP gateway IP i.e.192.168.0.