ccnp 300-101 exam topics

ccnp 300-101 exam topics

LocPrf 0.0.0.0 . Match as-path 1 Under normal circumstances, the data is preferred to go ip next-hop , that is, go ISP2 DHCP overview Bgp confederation identifier 345 This command is used to tell the AS outside the federation . My local AS number is 345. Route-map first acquaintance PVST+ Redistribute ospf 1 Then PC ping 10.1.13.0 , the data goes R1 ; Ge ge-value The next outgoing interface of the route is the port of the match . 802.1W Weight 10.1.13.1 Ip arp inspection log-buffer logs number_of_messages interval length_in_seconds Preemption enabled, min delay 30 sec This way the routing table: Router(config)# router ospf 1 Router ospf 1 Double-point bidirectional routing re-release 91 This summary route generated locally is 172.16.0.0/16 , NH=0.0.0.0 , weight= default value 32768 , origin=i . The detail route is marked as " s " and is therefore suppressed. [Experiment 3 ] Cancel detailed route suppression for a specific neighbor The configuration of R2 is as follows: The cost of the route. The access layer switch uses a dual link to connect to two aggregation devices to form a Layer 2 environment with physical link redundancy, which solves the problem of single link failure. Each cluster contains a reflector and its client --------------- 192.168.10.1 In B and C on a pair of A do strategy, i.e. AS external boundary of AS do MED , such that A selected lower the MED value. Ip route 0.0.0.0 0.0.0.0 null0 router bgp x Ip address 192.168.10.254 255.255.255.0 Associate route-map when route is re-published 1-4094 Obviously this method is too poorly scalable. Switch(config)# spanning-tree portfast default / / used to define the condition prefix to be injected Instead of tearing down and rebuilding TCP or BGP connections, only the update operation is triggered to make the new routing policy take effect. Soft reset can be used for both inbound and outbound policies only due to outbound or inbound policies. The configuration of R2 is as follows: Let's look at the picture and deploy a two-way re-release on R2 and R3 . Route-map test permit 20 router ospf 1 Configuration Example OSPF can let R3 learn 1.0/24 and 2.0/24 routes. FastEthernet0/0 Fa0/20 Address family identifier. When the value is 2 , it indicates the IP protocol. Therefore, from here we can see that the route summary is a risk of looping. One way to solve the above problem is to add a static route on the Layer 3 switch: ip route 192.168.0.0 255.255.0.0 null 0 , this way, when it receives access Router bgp 345 IP prefix lookup IPv4 mtrie 8-8-8-8 optimized Input fast flags 0x0, Output fast flags 0x0 ifindex 3(3) R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. Packets Define a DHCP address pool. One network segment corresponds to one address pool. Ip address 3.3.3.3 255.255.255.0 Multi-vendor routing environment * 172.16.0.0/16 is variably subnetted, 4 subnets, 2 masks S* 172.16.0.0/16 [1/0] via 172.16.3.0 The weight of the BGP route generated by the local summary is also 32768. The configuration of R1 is as follows: Load balancing Paths: (1 available, best #1, table Default-IP-Routing-Table) Flag: 0x820 R1 and R2 run IBGP , use LOOPBACK as the update source,ccnp 300-101 exam topics, and refer to neighbors . R2 and R3 are EBGP relationships. R3 announces 3.3.3.0/24 into BGP , and configures next-hop-self for R1 on R2 . Host 192.168.1.111 255.255.255.0 RSTP is designed so that we don't have to rely on the adjustment timer and can make the interface safely transition to the forwarding state. To achieve fast convergence on the interface, RSTP introduces some new concepts: The DHCP server receives the DHCP message. If the server can identify option82 , it will assign an IP address to the client according to the information carried in option82 and select the corresponding policy. The server then responds with a DHCP packet, which also contains option82 information. Neighbor 1.1.23.2 route-map test out 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 . Penalize mode shutdown (enter err-disable state) while sending an SNMP trap The maximum number of secure addresses, the upper limit allowed by different software platforms is different, but the default is 1 . 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. The RID is the largest IP address on the router and tends to be assigned to the loopback address. It can also be set manually by the bgp router-id command. If a path contains an RR attribute, the route generator ID ( originator ) will replace the RID in the optimal path selection process. One-arm routing 100.0.2.0 should choose R5 , check out the BGP table of R4 : 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 . The configuration of R2 is as follows: Router ospf1 If the feature is not enabled on the local end, the data packet is either routed successfully or never routed out (discarded). Use the match command to match a specific packet or route, and set to modify the packet or route related attributes. Multi-vendor routing environment 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 peer is empty. The origin of the distance vector name is because the route is advertised in the form of a vector (distance, direction), where the distance is defined according to the metric, and the direction is defined according to the next hop router. Router ospf 1 Passive-interface configuration An important improvement in RSTP is the rapid transition of ports. The traditional STP algorithm needs to go through several timers before transitioning an interface to the forwarding state. In order to get a fast convergence of the network, we may adjust the timer, but this method may affect the stability of the network. Knowledge review DAI configuration example BGP router identifier 10.1.13.3, local AS number 345 If multiple path originating router IDs or router IDs are the same, then the shortest path of the Cluster-List is preferred . On CISCO IOS , interface x interface mode: If the packets of the same data stream are sent in different paths, the IP packets may need to be re-queued when they reach the destination. This may reduce the forwarding performance of traffic such as VoIP , or if the packets arrive out of order, the quality of service will be degraded, packets may be discarded, and delay jitter will be added. Burst interval , the default is 1s , optional configuration. This is a continuous detection period, used to detect the number of ARP packets in this time period . The default is 1S , so that is, within 1S , if 15 (default) ARP is exceeded , the violation is. This time can be selected from 1-15S. 100 Distance bgp xyz //x is the EBGP route, y is the IBGP route, and z is the BGP route announced by the local network . Experiment 1 10.1.13.1 Additional instructions: Set the timer of STP Hello time 3 sec, hold time 10 sec Next hello sent in 1.280 secs 3.3.3.3 Authentication (16 octets) Switch(config)# mls rate-limit layer2 port-security rate_in_pps [burst_size] Routing feedback AS_PATH , LOCAL_PREF and MED , and added ORIGINATOR and CLUSTER_LIST for anti-ring. Inside the AS , the AS-PATH does not change, and the AS_PATH anti-ring cannot be used , so loops are easy to occur. OSPFpassive-interface neither sends nor receives routing updates, nor does it send HELLO packets. The configuration of the DHCPserver is as follows: 8 bits Match ad , abcd , aaabcd, etc. Switch(config-if)# ip address 192.168.20.254 255.255.255.0 Link-level data transmission: Receive data from the LLC sub-layer, attach the MAC address and control information, and send the data to the physical link; provide verification and other functions in this process. 4.3.2 Message Type 35 s> 172.16.1.0/24 Send TCP packet Re-routing interface connecting the local release, static routing weight is 32768 Path B and C receive this better BPDU and continue to flood the network. To maintain a consistent BGP topology, the RR does not modify certain BGP path attributes when it reflects routes . These attributes include NH . : Enabled Class and classless route lookup mode 9 In the R3 , the route AS_PATH learned from R2 about 1.1.1.0 will become " 6666 200 i ", because R3 receives 1.1.1.0 In a real-world environment, an IP address is generally used to indicate the object of communication, and the function of ARP is to " resolve " the IP to the corresponding MAC address. R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. R2#sh ip bgp The above figure only makes basic BGP configuration, releases 1.0 and 2.0 on R1 , does not summarize, and 1.0 and 2.0 BGP routes received by R4 . learner Any None On R1 , only the summary route 32.0/21 is filtered, and all the detailed routes are released. If a standard ACL is used to match the route, how to write it? Multiple paths have the same RouterID because they are received from the same router. *>i100.0.2.0/24 5.5.5.5 ( metric 2 ) from 5.5.5.5 (5.5.5.5) Detailed rules 7 1 state change, last state change 00:07:24 MAC address is 0007.b400.0101 (default) Owner ID is cc00.043c.0000 Rapid Transition to Forwarding State * i100.0.1.0/24 Next Hop 5.5.5.5 Interface configuration: spanning-tree bpdufilter enable Set local-preference set weight There are class, classless routing protocol redistribute Match ad , abcd , aaabcd, etc. The Permit/deny keyword has a different role in different deployment scenarios. 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 100 Paths: (1 available, best #1, table Default-IP-Routing-Table) Flag: 0x820 Half-duplex and full-duplex are the concepts of the physical layer, and the different access modes for the duplex mode of the physical layer are the concept of the data link layer, thus forming an important feature of Ethernet: the data link layer and The physical layer is relevant. Set comm-list del delete route-map test permit 20 R2 The ip community-list is also like ACL . There are standard and extension points, 1-99 is the standard, and 100-199 is the extension. Extended community-list FastEthernet1/0 ! ! Automatic generation LoopGuard MED : 100 CASE2 : Router bgp 100 Set the interface to access mode Ip policy route-map PBR The length of the AS_PATH is to influence the path selection. It is not recommended in the actual environment. Hash Route summary 23 Using reflector 20.20.20.0/24 Network 192.168.24.2 0.0.0.0 area 0 Clear ip bgp soft out // Outbound soft reset, resend update message to all neighbors Router bgp 300 100 Vtp pruning is off by default Each cluster contains a reflector and its client Network ? *end* * 11.11.11.0/24 0.0.0.0 100 None At this point , the route 1.1.1.0 is seen on R3 , which contains the next hop attribute, and the previous one. Logical aggregation of similar links Note that after the DHCP snooping is enabled on the switch , the dhcp packets are snooped. Therefore, when the DHCP attack is generated on the network, the performance of the switch will be seriously degraded. Therefore, you can limit the number of interfaces that can be received on the interface. Number of DHCP packets. Configure the number of DHCP packets per second that an interface can receive. The range is 1 to 2048.