ccnp rstut

ccnp rstut

Maximum frame: 1518+4=1522 Look at the above picture, the gray space 172.16.0.0/16 , this network number, we call the main class network number , the so-called main class network number, meaning the network number, according to the IP address category to which it belongs , corresponding to The network number obtained after the default subnet mask length. Such as 172.16.0.0 this is a ^\(65000\)$ * i100.0.2.0/24 Weight Service dhcp Then according to our thinking, on the R4 should be able to see the choice of 100.0.1.0 is R3 is 3.3.3.3 , go to So match interface is a match with the outbound interface attribute, and this Used to announce aggregated and selected detail routes (suppress specific detail routes), followed by route-map xxx , matched by route-map Modify the default value of the MED value Network Next Hop Metric LocPrf Weight Path ( 0xFFFF0000-0xFFFFFFFF ) is a reserved community value. In addition to these values, several well-known values ​​such as no-export , local-as, etc. are defined. For specific values, see RFC . 0xFFFF Tag 1111, type extern 2, forward metric 64 Double-point bidirectional routing re-release 91 1.1.1.1 Compatibility 37 Device ID When, the AS_PATH only AS300 , 400 , and thus be B router to accept a summary of the article (because do not see their own AS number appears in The IP configuration is as above. The R2 interface is configured with two IP addresses, and both have announced that the entire network runs RIP . VLSM support The experiment is completed here, we set MARK , then we will analyze the impact of various attributes on the routing. The keyword should be added, otherwise the main class route will only be re-published. Port-Security R2 re-advertises the A route, then according to the preemptive rule, R3 will ignore the R1 update about the A route. At the same time, due to the deployment of two-way re-release, R3 will further re-publish the learned A- route back to process 1 . ! Next Hop Origin IGP, metric 0, localpref 100, valid, internal 2 : RIP-2 ; Configuration example 46 The preferred principle is IGP > EGP > Incomplete Based on UDP protocol ports 67 and 68 The 10.1.10.0/25 subnet cannot be updated because the subnet and the update source interface belong to the same main class network, but the masks are different. Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale Origin codes: i - IGP, e - EGP, ? - incomplete Three-layer bundle Vlan 10 Switchport access vlan 100 interface fast0/24 The WEIGHT attribute is a CISCO private attribute. The scope is this router (not passed), the value is not included in the update Obviously this method is too poorly scalable. Knowledge review R1(config-router)#redistribute rip subnets tag ? The process of processing a VLAN frame by an access port is as follows: The keyword should be added, otherwise the main class route will only be re-published. Each message contains a BGP message header. The header of the BGP message is as follows: 100 Test purpose: VTP pruning The Layer 2 switch searches for VLAN configuration information based on the destination MAC address and VLAN ID of the frame, and determines from which port the frame is sent out. Network 10.1.45.0 0.0.0.255 area 0 5.5.5.5 R3-R4 ; R4-R5 ; R3-R5 maintains IBGP neighbor relationships and uses their respective LOOPBACK ports as update sources and establishes When R2 Switch(config-if)# switchport port-security aging time ? Retaining the NEXT_HOP attribute outside the federation within the federation Match length matches according to the third layer length of the packet It is recommended to configure a wild VLAN as Native vlan. Example 2 : 3.3.3.3 AS_PATH is a recognized attribute that describes the sequence of AS numbers that will pass through to the destination network . The most important role is anti-ring. If the BGP speaker finds that its AS number is located on the route received from the external peer, the route is ignored. Offset-list offset list Different OSPF between two-point two-way process re-release, can also use a static summary route re-issued, respectively, in two ASBR create different static routes summary above, re-publish static summary routes in the corresponding processes. Each AS has an identification number ranging from 1 to 65535 , of which 64512 to 65535 are reserved for private use. / / Used to match the BGP neighbors passed to my summary route , here is the IP of R4 The message will not be passed to any BGP neighbors. The range is 0-65535 . [Experiment 5 ] There are subnet routes, the subnet route prefix length is different (but both match), and the longest match Static routes Ip prefix-list 1 permit 11.11.11.0/24 ip prefix-list 2 permit 12.12.12.0/24 route-map RP1 permit 10 Enables debugging on the DHCP client Also pay attention to the sending conditions of ICMP redirects here . At the same time, note that this default route on R3 , if configured to associate with the outbound interface, can not observe the phenomenon of redirection, as for the reason, you know, proxy ARP . By using route tags in RIP , you can control the redistribution of related routes in other protocols. When republishing to other protocols, RIP routes simply compare the tokens assigned to them without comparing the entire route. R1(config-router)#distribute-list 1 in ? // All interfaces Two modes of operation: normal (the default) and aggressive In the example, the static route associated with the next hop does not have this attribute, so it is not matched. Route-map cisco permit 20 match ip address 2 set metric 20 100 30.30.30.0/24 200 i Router bgp 100 Flash: Database agent URL External route tag. The difference between set ip next-hop and set ip default next-hop is relatively simple, it is not resolved here. The Conditional inject is configured as follows (in BGP routing process mode): The data is two-way. When considering traffic, pay attention to the round trip of traffic. On this topic,ccnp rstut, the individual feels that there is no need to study it. It does not make much sense for the research of class-based routing protocols. No matter the actual application or the LAB exam, it is no longer involved, and you are interested in making it yourself. Network 3.3.3.3 0.0.0.0 area 0 IP prefix lookup IPv4 mtrie 8-8-8-8 optimized Input fast flags 0x0, Output fast flags 0x0 ifindex 3(3) 10.1.12.2 Compare by default from top to bottom Forwarder 1 State is Active RIP is re-released into OSPF Router bgp 64513 Vif PGM Multicast Host interface Portfast,uplinkfast, backbonefast Synchronize only VLAN information Understanding Port-Security ? ? basic configuration Neighbor V AS MsgRcvd 3.3.3.3 But there is a loop in the second floor environment. 10.1.13.1 DAI configuration policy Neighbor 10.1.13.3 route-map test out The core layer switch SW2 also enables dhcp snooping . By default, all ports are untrusted . If the fast0/24 port of SW2 receives the dhcp packet carrying option82 , it is discarded. One of the solutions is to configure the fast0/24 port of SW2 as the trust interface. However , the dhcp message received by the trust interface does not create a dhcp snooping binding entry. Another way is to use the command: ip dhcp snooping information option allow-untrusted . This command is used to carry the DHCP packet of option 82. The dhcp snooping binding entry is created locally .