ccnp switch flashcards

ccnp switch flashcards

Border Gateway Protocol (BGP) Connected Using this feature may reduce the performance of the device to a certain extent. In addition, you must ensure that CDP is enabled for both the neighbor and the router interface . Process switching and CEF support this feature, but dCEF does not. Must be zero ? Includes 7 -byte preamble (a string of 1 , 0 intervals for signal synchronization) and a 1 -byte frame start delimiter ( 10101011 ) Idle A multiply character can be applied to a single character or multiple characters. If applied to multiple characters, put the string in (). : 1 to 3 Forward If R1 is configured as follows: IP nodes can communicate, and communication is actually the process of data interaction. Data interaction requires network devices to help us transfer data between two communication nodes. When the router (or other Layer 3 device) receives an IP packet, the router will find out the purpose of the IP packet in the Layer 3 header. Implementation points ... Basic VLAN concept Port number 521 Neighbor 3.3.3.3 route-reflector-client Seeing the summary route generated on R3 , AS_PATH inherits the detailed AS_PATH and presents it in the form of {100 , 200} , which can prevent the loop from happening, and will not cause hidden dangers due to the loss of the AS_PATH of the detailed route. . Note that the AS_PATH type in {} is AS_SET and is an unordered list of ASs . Match ip address 1 set tag 10 In this step, we run the BGP protocol on the above basis to complete the establishment of basic BGP neighbor relationships: 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 The direct result of this command is that the metric of 192.168.12.0 in R3's original routing table is 30720 , but now it is 10000 , which becomes 40720 . We see that after the offset command is configured , what actually changes is the DLY that is updated to the neighbor . Because it is true that DLY is the best, the default R4#sh ip b 100.0.1.0 EIGRP , BGP and other dynamic routes learned. SW1#show port-security interface f0/1 Route 11.11.11.0 is introduced on R1 . 200 i *> 100.0.1.0/24 Port Vlans in spanning tree forwarding state and not pruned 10.10.10.0/24 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. This command can change the properties of the aggregation route (note, only for the summary route, not for the details). Redistribute ospf 1 match internal external 1 external 2 The route originated from the local (such as the local network , or aggregate ), that is, the next hop is 0.0.0.0 ( in the BGP table , the current path) 100.0.2.0 should choose R5 , check out the BGP table of R4 : Metric Ip dhcp snooping BGP table Revoked route 14 This idea has been applied to dynamic routing protocols such as OSPF . Careful children's shoes will find that after you deploy route summarization in OSPF , it will automatically generate a summary route pointing to null0 locally . The reason is explained above. the same. Manually shut down a specific port and then noshutdown 100 Note that atomic_aggregate is a recognized free decision attribute. Let's understand: This global configuration command enables PBR to take effect on locally originated traffic. Experimental results: Lease expiration You can use the show cef interface command to check which load balancing mode is used. This command gives the CEF information configured on this interface . Ip address 192.168.10.254 255.255.255.0 Understanding Port-Security SW2(config-if)# glbp 1 10.1.1.254 Network Next Hop Configuring a sample RIP environment Local origin The secure address entry can be configured by using the MAC ( SecureDynamic ) dynamically learned by the port , or by manually configuring the interface ( SecureConfigured ) and the sticy MAC address ( SecureSticky ). 10 FastEthernet0/1 Prefix list is much more controllable than access list, supports incremental modification, and is more flexible Below is an example: Single match includes a plurality of conditional statements, logical or operation; multiple match when the statement, using the logic and operation. ICMP redirects are always sent ? Paths: (1 available, best #1, table Default-IP-Routing-Table) Flag: 0x820 Redirection enabled, 597.032 sec remaining (maximum 600 sec) Time to live: 14397.032 sec (maximum 14400 sec) : 1 None In update their ARP table or will receive the ARP before forwarding the message out to check legality, mainly to see the ARP packets in IP and The configuration of R2 is added as follows: Origin Since the flash space is very limited, it is recommended to store the file on the TFTP server. When deploying on a TFTP server, be careful to first create an empty file to correspond to the URL in the configuration command . This file is used for dhcp snooping bingding database writes (depending on the device). Hard reset Route Tag NEXT_HOP on shared Media (operation on shared media) You can also configure DAI to discard the Ethernet frame source MAC and ARP body in the MAC illegal inconsistent ARP . This is followed by a further introduction. 110 Access-list 1 permit 10.1.1.0 ? The IP header is 20 bytes, the ICMP header is 8 bytes, and the ICMP data payload is 1472 bytes, which is exactly 1500 bytes. Therefore, on the CISCO IOS device, the size followed by the ping refers to the entire size of the outgoing IP packet. Weight 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. Private-vlan primary R1 releases 10.0 , R2 releases 20.0 , and R3 issues 30.0 routes. Next, look at the different commands (keywords) configured on R2 . These BGP routes are learned by the specific router after the AS_PATH changes: DNS , WWW , and SMTP servers belong to the same subnet ! Local origin 201 200 10.1.34.3 from 10.1.34.3 (3.3.3.3) Configuration command, ARP packets permitted or denied by the ACL are logged. Next-hop , the next-hop is changed to the update source IP of R3 , which is the loopback interface IP. Configuration command: In interface mode, you must configure the interfaces on both ends of the link. After the completion, you can show ip rip database to view the routing details. Therefore: the route is redistributed into OSPF , the automatically inherit these external routes BGP 's A_PATH property, note that only inherit AS_PATH Router ospf 1 Static Routing Configuration Neighbor routing source neighbors allowas-in a few of my as numbers For the above problem, we can set the Fa0/0 port on the router to passive-interface . As a result, the interface will not send OSPF Hello messages. At the same time, the network segment 192.168.1.0/24 associated with the interface will still be Be declared into OSPF so that you can avoid unnecessary The initial situation is the same as above. Let's take a look at redistributing OSPF routes into EIGRP AS 100. The configuration is of course still carried out on R2 . Configuration example: Still looking at the picture, if the middle network is not a broadcast multi-access network, but a frame relay network, then it should be noted that the route received by C , Ip route 3.3.3.0 255.255.255.0 serial 0/1 The packet is captured as follows ( R3 sends the BGP update package to R4 ): Ip address 10.1.34.3 255.255.255.0 Passing the value of Tag On the untrust interface, create a security entry by manually configuring ARP ACLs on B. Of course, you can isolate the two switches in three layers, for example, add a router. [^act]$ Document number Risk of routing policy configuration loss Ethernet data link layer Match community 11 exact-match // strict match Vlan 100 Prefix list is much more controllable than access list, supports incremental modification, and is more flexible IP Routing Overview Ip mtu ? refers to the three-layer MTU . This value can be manually modified, but the maximum value must be less than the interface's Layer 2 MTU value, which is 1500 . This MTU refers to the total size of the three-layer IP packet. If the packet sent by the interface is larger than the ip mtu of this interface , the IP packet will be fragmented. At this time, if another PC accesses the port, the port-security interface will receive a new data frame of the MAC address in the non-secure address entry , and the triggered violation action is given to the interface. Will be err-disable off. At the same time, a snmp trap message is generated . In addition, under the interface, the Security Violation Count will be incremented by 1. TIMER 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 . Network The type parameter in the above command is used to indicate the hardware type of this hardware address. If type is 1 , the type is ethernet , if type About PBR R1(config-router)#distribute-list 1 out ? On the other hand, we capture the package: Reference 39 Suboption type match. Such an approach will match community included 100: 11 routes. By MED influence route selection Matching 1256 and 123 456 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. CASE1 : The configuration of R2 is as follows: Sw(config-vlan)#private-vlan community 5.5.5.5 The switches at both ends of the trunk need to use the same trunk protocol. Distance vector routing protocol 20.20.20.0/24 The Client does not know its own Client , so the RR itself can also become a client of others. Neighbor 10.1.12.2 advertise-map RP1 non-exist-map RP2 The problem that the static route associated with the outgoing interface is in the network DMZ-Link Bw 193 kbytes Principle of ARP protocol Pipe character, logical or Index We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows Loc-RIB BGP router selects the route by using its local routing policy for routes in adj-RIBs-In When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 For the interface in the forwarding and listening state, transition to the block state (in the case of link failure) Traffic share 1 Load balancing: round-robin Group members: Route-map test permit 20 router bgp 200 RIPv2 supports authentication by changing the field in the RIP message that should normally be the first route entry . In the single update message with authentication , the maximum number of route entries that can be carried is reduced to 24 . Etc., then there is a prioritization between these methods: network>redistribute>aggregate Note that this principle is not used as a BGP routing routing policy. FastEthernet1/0 ? Redistribution is to look at the routing table,ccnp switch flashcards, that is, for example, I redistribute OSPF to EIGRP , then the route must be in my routing table, and must be OSPF routing before it can be injected into EIGRP . In addition, there is a small problem here . The link between R1 and R2 , although it does not see the OSPF route on it in the routing table of R2 , it was successfully re-released into RIP and learned by R3 . This is because of this direct link (interface) has been R2 's OSPF process network up , namely by OSPF learned to, and is a direct link, and therefore can be re-released.