ccnp 300-115 dumps free download

ccnp 300-115 dumps free download

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. Port number 520 Some routes can be assigned a specific COMMUNITY attribute, and then BGP attributes can be set based on the COMMUNITY value instead of each route . The COMMUNITY attribute works for neighbors. After setting, it needs to be sent to the neighbor ( SEND ). [Experiment 1 ] There is a main class route; there is a default route, and the main class route is taken. Router(config-router)# distance AD ip-src wildmask acls Obviously, the DHCP server is aware of the above problem, and the action it takes is to ignore this DHCP request. Therefore the PC cannot get the address. Optimum and Distributed Switching 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 . !! wherein 2.2.2.2 is R2 of Router-ID , attention since 100.1.1.0 in R3 of OSPF Ip route 10.1.1.0 255.255.255.0 10.1.254.1 * RIP-2 Only 200 i Network BGP routing rules 1 Ip prefix-list 11 permit 11.11.11.0/24 route-map test permit 10 Neighbor 1.1.23.2 route-map test out R4 has two BGP neighbors, where R3 is its federated IBGP neighbor and R5 is its federated EBGP neighbor. IP Default behavior: source IP address pair ( src-dst-ip ) Router ospf 1 The above command only re-advertises OSPF internal routes and E1 routes into BGP. Neighbor 5.5.5.5 update-source Loopback0 no auto-summary R4#sh ip b 201 200 ? Use ip community-list to match the community value The configuration of SW2 is as follows: MED : 200 * i Port Mode Encapsulation Status Native vlan Fa0/20 on 802.1q trunking 1 / / Detailed release Port Active: capita ask if the other side can/will Alternate port: Discard status. In addition to the root port and other ports to the root path, if the active root port fails, the replacement port becomes the root port, so the alternate port can be understood as an alternative to the root port. R2#sh ip route Neighbor 3.3.3.3 route-reflector-client 1,20,30 Content Addressable Memory Table content addressable memory AS_Sequence is well understood. In the case where the above figure does not make any policy, the type of AS_PATH carried by the BGP route delivered to R4 is AS_Sequence . This is an ordered list of AS numbers. When R4 receives the route update, AS_PATH is 300,100 , RIP-1 Only No synchronization no auto-summary length AS_CONFED_SET A list of unordered AS numbers on a path to a specific destination , using the method with AS_SET Ospf rip static R4 and R2 , we look R2 , R2 moment from R4 has learned this RIP routes, if it from the R3 also learn the route and of the route metric is smaller, then, R2 will preferably from R3 this Routes , so that R1 , R2 , and R3 form a routing loop. Match community 1 Associate route-map when route is re-published Y  official version Router ospf 100 BGP table version is 1, local router ID is 4.4.4.4 TCP connection establishment was successful, starts sending Open package, Open packet carries establish parameter negotiation peer. Consider the case where R2 is RR , and R4 and R5 respectively declare loop Router#show ip route Accept either real AS or local AS from the ebgp peer . Translation: EBGP peers can use either PriAS or SecAS to local remote-as . For example, after configuring the above command on R2 , R3 is 10.1.23.3 . In its BGP process, you can use neighbor 10.1. 23.2 remote-as 200 , you can also use remote-as 201 to refer to BGP neighbor R2. Supplementary explanation of the role of the as_set keyword: 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. 100 If the penalty value exceeds the pre-set threshold - the suppression limit: the penalty value reaches this threshold, the route is suppressed, ie not released, until the N half-life, the penalty value is reduced to another threshold: re-use threshold (de-suppression threshold) ), the suppression of the route is lifted. 201 Associate route-map when route is republished (typical case) Path MED Then the received route becomes 10.1.20.0/24 and the mask is correct . Also, when R2 hangs, the entry of 172.16.2.0/24 is invalid, and the data destined for the 2.0 subnet is matching 172.16.0.0/16. If there is no tag , mark the PVID of the trunk port and proceed to the next step. Can be detected when a violation time occurs, and can be punished Option82 *> 100.0.2.0/24 Distribute-list 10.1.12.1 from 10.1.12.1 (1.1.1.1) Version !! GW has no other configuration about routing Both R1 and R2 inject 100.0.1.0 and 100.0.2.0 into BGP using network . Define set action The configuration of SW2 is as follows: On R1 , ip route 1.0.0.0 255.0.0.0 null 0 then ip defaut-network 1.0.0.0 , then R2R3 will learn the default route Show ip bgp 11.11.11.0 on R3 / / Modify the default parameters Vlans allowed on trunk In the full-duplex mode, the transceiver can be directly sent and received without pre-determining the busy state of the link. When will BGP automatically summarize? 5.5.5.5 If the MED of the received or generated route is empty , set the MED to 0 when advertising to the IBGP Peer . 10.1.23.3 from 10.1.23.3 (3.3.3.3) R1(config-router)#distribute-list 1 out ? In 802.1q the native vlan is untagged, using Dot1q switches all unmarked frame is forwarded to the native vlan in the ISL on all data frames, including native vlan encapsulation, so if the package is not received The data frame will be discarded (the ISL does not have the concept of a native VLAN ). Optional non-delivery 10.1.12.0 [110/128] via 10.1.23.2, 00:06:40, Serial0/0 Neighbor 10.1.12.2 route-map test out Switch(config-if)# ip address 192.168.20.254 255.255.255.0 The command distribute-list out works only on the routes being redistributed by the Autonomous System Boundary Routers (ASBRs) into OSPF. It can be applied to external type 2 and external type 1 routes, but not to intra-area and interarea routes. Used to announce aggregated and selected detail routes (suppress specific detail routes), followed by route-map xxx , matched by route-map 1 command) only sends and receives v1 messages, v2 only sends and receives v2 messages by default . MAC address Neighbor 10.1.12.1 capability orf prefix-list send neighbor 10.1.12.1 prefix-list FILTER in Router bgp 64512 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 . * If R1 R2 is established between EBGP neighbor relationship, because EBGP establish neighbor relations will check direct route, and the default TTL = 1 , and IP routing table ( IP Routing the Table ) Exit BGP routing table entry for 1.1.1.0/24, version 2 1 : Request message, requesting all or part of the routing information from the neighbor; It is usually a direct connection because it will look for direct routes. EBGP default TTL is 1 ? Router(config-router)# distance eigrp internal-distance external-distance Next Hop Name server R1 announces 1.1.1.0 into BGP , and R2 learns these two routes from 10.1.12.1 and 10.2.12.1 respectively. By default, only med of routes from the same AS are compared. If you want to compare MED for all paths , you should configure this command. Also, if this option is used, it is recommended to do this throughout the AS to avoid routing loops. FastEthernet1/0 TYPE When track1 is true , that is, 10.1.1.2 is reachable, the data of the PC accessing the 100 network is lost to 10.1.1.2 . If track 1 is hung, the next next-hop is switched. When a BGP router sends a route update to its EBGP neighbor, it cannot carry the LP attribute. The LP value of the EBGP route received by the other party is null (even the LP field is there), but it will assign a default to this route locally. Value,ccnp 300-115 dumps free download, that is *> 100.0.2.0/24 PRI / / used to match summary routes Abc+d Match ip address 2 set metric 3 Solution 1 , modify the default AD value of BGP so that its EBGP route AD value is greater than RIP to achieve the preferred purpose, but this solution may not be appropriate, because he will have an impression on all BGP routes, if only hope for 1.1.1.0 And 2.2.2.0 has an impact? Sw1(config-if-range)#no ip address Ip route-cache flow show ip cache flow A distribution list is a tool used to control routing updates. It only filters routing information and cannot filter LSAs . Therefore: the distribution list is used in the distance vector routing protocol, and the route can be filtered normally in either in or out direction. But the work in the link state routing protocol is a bit problematic. Flooding the MAC table to the above port Continue to look R4 result of the capture ( R3 distributed to R4 of BGP update package): The port enters the forwarding state, and the bridge already has the designated port. AS_CONFED_SEQUENCE and AS_CONFED_SET Continue to look R4 result of the capture ( R3 distributed to R4 of BGP update package): IBGP neighbor relationship DMZ-Link Bw can only configure single-hop EBGP neighbors on this router. Vlan 100 Paths: (2 available, best # 2, table Default-IP-Routing-Table) Flag: 0x820 5 For the contents of this section, please refer to the relevant chapters of the path properties of this document. 4. Proposal/Agreement Sequence When UDLD detects a unidirectional link failure, it administratively shuts down the interface and prompts the user. Unidirectional links can cause various problems, including spanning-tree topology loops Receiving behavior ( If MED is empty , it is set to 0) Private VLAN ( PVLAN ) ? 3.3.3.3 Interface vlan 10 It means for VLAN100 traffic, not to log the ARP ACL discarded packets match Port switchport trunk encapsulation dot1q switchport mode trunk Ip address 10.1.12.2 255.255.255.0 Match ip address pref 1 set local-preference 100 When a BGP router sends a route update to its EBGP neighbor, it cannot carry the LP attribute. The LP value of the EBGP route received by the other party is null (even the LP field is there), but it will assign a default to this route locally. Value, that is ARP ACLs take precedence over DHCP snooping database entries. After you specified the global command ip arp inspection filter Switchport access vlan 10 interface fast0/24 Router ospf 1 5.5.5.5 In ASBR when re-released many ways to modify the external LSA of TAG value. Option82 Route-map Index In R1 to the 1.1.1.0 and 1.1.2.0 do a summary, as 1.0.0.0/8 , if coupled summary-only keyword, two details will be suppressed by inhibiting a bar if you want to cancel the details of a neighbor, Such as 1.1.1.0 , then The BGP configuration of R2 is as follows: 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. // to ignore 1.0 of If the MED of the received or generated route is empty , set the MED to 0 when advertising to the IBGP Peer . SW1(config-if)# switchport trunk encapsulation dot1q SW1(config-if)# switchport mode trunk If the route is passed from an IBGP neighbor and is introduced by the BGP router in the AS doing what 10.1.12.1 from 10.1.12.1 (1.1.1.1) Ftp: Database agent URL Weight R4 released the RIP route of 100.1.1.0/24 , which can be learned by both ASBRs . The solution is to configure static summary routes on the two ASBRs : BGP has three management distances, 200 learned from IBGP and 20 learned from EBGP . This is because the design concept of BGP works. WWW and SMTP belong to the Isalated VLAN , so they cannot access each other; WWW and SMTP servers can only communicate with the promiscuous port, that is, with the router. Viewed as one logical link The configuration of SW2 is as follows: For example, in R3 viewed on R5 sent me 6.6.6.0 of this OSPF external routes, you can see the tag field is 600 (automatically inherit the AS_PATH ) And this time, R3 the OSPF redistributed into BGP , the default is not automatically restored AS_PATH attribute, so you need: Here to add a sentence, since attention to traffic, we must pay attention to the round trip of traffic, in general, we want 1.1.1.0 access 3.3.3.0 traffic to go ADC , then round-trip traffic generally requires a consistent path. That 3.3.3.0 to 1.1.1.0 data to a CDA , so to further D on the update to the C of 1.1.1.0 route of metric plus 1 jump. R1 uses 1.1.1.1 as the update source, trying to establish a BGP connection with 2.2.2.2 , and the local IP address of R2 is 1.1.1.1 , and This is a simple method of data offloading and path redundancy using the longest matching principle. ? 100 None 3.3.3.3 IP Ip default-network 192.168.1.0 Default Port-Security configuration Optimum and Distributed Switching One solution is that SW1 does not insert opiton82 , another method is to use the configuration on the DHCPserver : 192.168.2.0/24 Protected port can only communicate with unprotected port (default) Synchronize only VLAN information In the above configuration, the maximum number of secure addresses is set to 3 , and then a secure address is manually configured. Then there are two remaining , and the switch can construct a secure address through dynamic learning. The larger the Local_Pref , the higher the priority FastEthernet1/0 Network Ip arp inspection limit {rate pps [burst interval seconds ] | none} 200 i Administrative Distance (AD) 6 Route-map WT1 permit 10 match ip address prefix-list 1 set weight 200 In AS inside, due to the presence IBGP split horizon, making BGProuter had twenty-two established between IBGP connection, in order to get the full BGP routing updates, but this is a very low scalability approach, but also brought to the network device The two effective ways to solve the IBGP scalability problem are route reflectors and federation. Compared with the federation, the route reflector has the advantage that all routers in the federation need to support and understand the federated mechanism. The route reflector only needs the RR to understand the reflector mechanism. In addition, the implementation mechanism of the route reflector is relatively simple. Of course, if you want to manage large-scale AS with various EBGP mechanisms , then the federation will be a better solution.