ccnp tshoot questions

ccnp tshoot questions

Next Hop Sw(config-vlan)#private-vlan association 201,202 The router goes to update the route of 3.0.0.0 Interface vlan 10 Update it; however, it does not send its secondary address 11.0.0.0 segment from fast0/0 to R1 (unless the split horizon is turned off). Metric *>i100.0.2.0/24 Because Layer 3 switches support so many types of interfaces, the deployment of Layer 3 switching networks is more flexible and scalable. Ip route 10.1.2.0 255.255.255.0 10.1.254.1 5.5.5.5 Ip arp inspection validate { [dst-mac] [ip] [src-mac] } 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 Off: EtherChannel not configured on interface The router is typically used to determine whether the inbound interface and the source and destination address type CEF exchange . For consider CEF of routers , the outbound interface must be configured to CEF exchange mode , if the interface is configured CEF, then CEF will attempt to exchange data package. Otherwise , CEF will deliver the packet to the next best available exchange method. Management distance problem 43 Atomic_Aggregate is a recognized self-determination attribute; Aggregator is optional. distribute-list If it is injected through network or re-release, the IGP next hop of the prefix will be the next-hop of BGP before injection. BGP metric is set to IGP metric The configuration of R3 is as follows: Bindings are just special address pools. There is no limit on the number of manual bindings, but you can only configure one manual binding per host pool. None 200 i Definition of 1042 . The most commonly used encapsulation format today is the format defined by RFC894 , commonly referred to as Ethernet II or Ethernet DIX . DMZ-Link Bw 193 kbytes is an extended community attribute, so if you want to pass this value to the just IBGP neighbor in the AS , you need to add send-community and add the extended keyword. Switch(config)# spanning-tree portfast bpduguard default The vlan number supported by ISL is 1-1005 (the default is allowed to be normal), 802.1q is 1-4094 (all normal and extended by default), so mapping is required when passing through the 802.1q and ISL trunks . 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. The maximum number of secure MAC addresses allowed by default is 1 So to rule 12 : if multiple path originating router IDs or router IDs are the same, then the shortest path of the Cluster-List is preferred . ^10. Ospf rip static Can affect BGP routing (before the equivalent load balancing), somewhat similar to " tie breaker " in the path selection, is to break the tangles when tangled First come to know the first three-layer interface: SVI switched virtual interface, a logical interface of SVI , that is to say not a physical interface, when we create a VLAN on the switch , we can create a The SVI interface corresponding to the VLAN , for example, we created Option 82 sub-option 2 : Remote ID , which is generally the MAC of the access layer switch that inserts the option 82 information . Native vlan When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 3.3.3.3 This entry will be entered into the routing table as a direct network (see below) Route-refresh Circuit-ID suboption fields Fast switching is superior to process switching, it uses a route cache ( route cache ) for storing information about a stream of data (Flow) specific information , Input conditions: length < ge-value < le-value <= 32 By defining AS345 as a federated AS (large AS ) and a member AS (small AS ) in the federated AS , the problem of IBGP route delivery can be solved . IP routing table ( IP Routing the Table ) V1 defaults to send v1 to receive v1, v2 The processing of the DHCP packet of option82 . Ip route 172.16.1.0 255.255.255.224 192.168.12.1 Enables multiple gateways to be used at the same time and automatically detects active gateways. Send Update package Router bgp 100 The election of the Root Bridge will not be said. On No-advertise no-export Exact match Link type Link types Router bgp 123 Route-map test permit 20 match ip address prefix-list 2 set metric 200 1.0.0.0/24 is subnetted, 1 subnets 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 We look at the above picture, the external detail route 172.16.32.0 – 39.0/24 , and the summary route 32.0/21 are introduced into OSPF by R1 , now Native Vlan Ip community-list 11 permit 100:11 BGP Access-list 2 permit 192.168.2.0 0.0.0.255 route-map PBR permit 10 To this end, some organizations and manufacturers propose to layer the data link layer, which is divided into logical link control sub-layer ( LLC ) and media access control sub-layer ( MAC ). Such different physical layers correspond to different MAC sublayers, and the LLC sublayer can be completely independent. As shown in Figure 1-4 . Neighbor 10.1.12.2 remote-as 200 Origin IGP, metric 0, localpref 100, valid, internal By default, only the MED values of BGP routes from the same neighbor AS are compared , that is, if the two routes of the same destination are from different Detailed command Preemption enabled, min delay 30 sec Active is local, weighting 100 Longest matching principle Off: EtherChannel not configured on interface Ip address 192.168.10.254 255.255.255.0 3.3.3.3 RIP-2 MD5 Authentication IP routing table ( IP Routing the Table ) Router bgp 64512 TCP connection establishment was successful, starts sending Open package, Open packet carries establish parameter negotiation peer. Route reflection clusters include reflectors and their clients Note that although R4 passes the route 400 {100 , 200} , the AS in the braces is only calculated as an AS in the AS_PATH calculation. Therefore ,ccnp tshoot questions, the two EBGP routes received on R6 have the same AS_PATH length. Finally, R6 The route of the oldest EBGP neighbor will be preferred . Match ip address 1 set metric 10 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 / / Interface or protocol Router bgp 100 Router bgp 200 bgp dmzlink-bw Ip arp inspection limit rate none , is unlimited By default, only O and O IA routes in OSPF are redistributed into BGP. 4. Proposal/Agreement Sequence Activate Port-Security on the interface Configuration last modified by 0.0.0.0 at 3-5-93 02:01:49 The default native vlan is vlan 1 Bgp default local-preference 500 // Modify the default lp value of the route originating locally RIP-2 Only Disable port 16 bits . This address of the neighbor must be IP reachable Ip default-network 172.16.3.0 becomes: ip route 172.16.0.0 255.255.0.0 172.16.3.0 The configuration of R2 is as follows: RIP re-advertises routes to OSPF : Switch(config-if)# switchport mode access Implementation of CEF 200 If ip routing is enabled , the command is ignored (but the default route Ip route 0.0.0.0 0.0.0.0 x ) is displayed ; The src-mac detects the received ARP packet. The source MAC address of the Ethernet pillow is the same as the sender MAC address in the ARP body . This verification action is performed in both the ARP request and the response message. i CASE1 : The configuration of R2 is as follows: The configuration of R2 is similar to the above. The key is to look at the configuration of R3 : Vlan range and mapping We still have to implement R4 access to 100.0.1.0 network to go R1 , access 100.0.2.0 network to go to R2 , this time we adjust MED , Switchport access vlan 100 interface fast0/24 Send Update package Tftp: Database agent URL Neighbor R2 default-originate route-map test * i100.0.2.0/24 bootPC: 67 (client port number); bootPS : 68 (server port number) If you reconfigure a secure access port as a trunk, port security converts all the sticky and static secure addresses on that port that were dynamically learned in the access VLAN to sticky or static secure addresses on the native VLAN of the trunk. Port security removes all Secure addresses on the voice VLAN of the access port. Case PBR 88 Block all ARP requests or on the DAI untrust interface (note the separation from DHCP snooping 's untrust interface) Metric When a router is directly connected through a point-to-point link, only one neighbor exists on each interface. The time interval between consecutively transmitted BPDUs of the root bridge . Default 2S OSPF redistributed directly connected interface default cost20 ; redistributed static route default cost20 ; using the default-metric can modify and redistribute static routes into other routing protocols OSPF default after the cost , but this command to redistribute directly connected interface. invalid. The default violation is shutdown . If it is protect , then the penalty will be gentle, for illegal data frames (such as the source of the data frame) Circuit-ID suboption fields LEN : Number of bytes in the Agent Information field , excluding the length of the code and len fields ! ( Optional non-transitive ) 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. Then call the track object in the route-map 2.2.2.2/32, version 55, epoch 0, per-destination sharing 0 packets, 0 bytes 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 By the original impact of routing attributes Test purpose: VTP pruning Path cost Neighbor 10.1.12.1 dmzlink-bw In SW3 created on 10 , 20 , 30 three VLAN We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows R4#sh ip bgp Viewed as one logical link This mode is the most worthy of reference . It is based entirely on other switching modes. The focus is on billing, monitoring, and network management of packets flowing through . FIG Ibid, 4.0 after hang, C sends message poisoning message, theoretically 4.0 routing is C advertised to B , the principle of the horizontal division, B is not the C advertised 4.0 information, but with a level of toxicity reversal split broke this principle, B periodically to C sends 4.0 poison reverse messages to let C know, his neighbors knew a 4.0 hang message and waiting eagerly 4.0 resurrected place full of blood, another benefit of doing so is avoid loops, at least C is not from B to go visit 4.0 a.