ccnp tshoot network diagram

ccnp tshoot network diagram

The configuration of R2 is added as follows: Sw1(config-if-range)#channel-protocol pagp/lacp Sw1(config-if-range)#channel-group 1 mode desirable The following figure is the open message content of the negotiation capability parameter (note the ORF part) Router ospf 100 ? Source of routing information: How is this route learned, for example, static, or through OSPF , IS-IS , PC2 is a new host access, arranged 192.168.0.1 address, the address after the completion of the configuration, PC2 transmits to the network a Gratuitous ARP , to prevent someone within the network using the same IP address, the Gratuitous ARP is senderIP and target IP All are themselves, senderMAC is its own MAC . Network topology and interconnection IP address planning as shown Dampening takes effect only on EBGP routes and invalidates IBGP routes. Metric Here, because there is an OSPF interval , and OSPF does not know BGP , the BGP attributes will be lost during the re-release process . bibliography Solution to provide more bandwidth Port Vlans allowed on trunk TRUNK 200 ? Switch(config-if)# switchport port-security aging type {absolute | inactivity} New link Link1 between A and Root Port role: We found that the route to 100.0.1.0 and 2.0 , the next hop is 3.3.3.3 , because of these two paths, original Switch(config-if)# spanning-tree portfast [trunk] A CFI of 1 is indicated as a non-classic format. Used to distinguish between Ethernet frames, FDDI ( Fiber Distributed Digital Interface ) frames, and Token Ring frames. Debug dhcp detail When a data frame is sent from a trunk port, the frame is sent directly. Complete the basic interface IP configuration . Add the following configuration on R2 : In the in direction, the distribution list can only filter the route when the LSA is received locally. When the route is generated, the router's own routing table that implements the distribution list will be affected by the distribution list (but the local LSDB still has the LSA ), and router will still LSADB in In this way, the entire network is interconnected. Note that when redistributing routes to OSPF , redistribute rip subnets , this subnets 10.1.13.1 Corresponding hwidb fast_if_number 4 Corresponding hwidb firstsw->if_number 4 BGP policy accounting on input is enabled. For example, R1 redistributed into direct on the OSPF , with out distribution list can be filtered out direction 1.1.1.0 this external routes. But R1 redistributed incoming routing, if R2 with the out distribution lists direction tried to block R3 accepted routes or LSA , you can not, because this is not a local external routes originating. FastEthernet1/0 R2 re-released the incoming A network segment route and then got up? Then R3 will ignore the route from R1 update. For R3 , go to Loopback Loopback interface ? Both R1 and R2 inject 100.0.1.0 and 100.0.2.0 into BGP using network . Switch(config)# vlan 255 Switch(config)# interface fast0/1 When R2 The route obtained by the BGP speaker from IBGP is not advertised to its IBGP neighbors (avoiding loops and splitting horizontally; except for the case of route RR ) Configuration command 65 Again, the following topology, the phenomenon is the same as above, pay attention to the summary route using the as-set keyword, the AS_PATH of the underlying detailed route will be put into {} , which is AS_SET . Ip prefix-list 11 permit 11.11.11.0/24 route-map test permit 10 Notifacation packets , resulting in session is interrupted; it can be re- AS on the border router IN strategic direction. Bgp deterministic-med Corresponding hwidb fast_if_number 4 Corresponding hwidb firstsw->if_number 4 BGP policy accounting on input is enabled. Advanced features 38 Fast Switching Wherein SW1 is as follows: The client ( D ) passed to it by the RR is not passed to the non- client (E) Solution: Modify the routing protocol administrative distance R4 on the show ip bgp 172.16.0.0 Origin IGP, metric 0, localpref 100, valid, external, multipath Router bgp 345 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. Port-Security deployment considerations No synchronization no auto-summary ? Configuration Example Ip address 10.1.45.5 255.255.255.0 SA sends the original switch MAC of the frame Default seed metric Note that atomic_aggregate is a recognized free decision attribute. Let's understand: Interface loopback2 + Native vlan Generally, it is 60-240 seconds longer than the invalid timer . If this time also expires, the routing entry is completely deleted. Cisco default 60s (note than invalidtimer multi- 60s ), RFC default 120s Local-Preference Data ( DATA ) Neighbor 10.1.23.3 remote-as 300 Synthesis example 1 : Ip as-path access-list 1 permit .* router bgp 300 Combine object tracking to detect the reachability of a remote device (or IP ) Ip route 100.0.0.0 255.0.0.0 null0 The mask of the destination address. Local origin As a result, R3 updates the BGP route to R4 , and next-hop will be replaced with R3 's loopback interface IP . In the BGP process: neighbor xxx default-originate to pass the default route to a specific neighbor. This configuration does not require a default route in the routing table. A bit like OSPF 's default-originate always / / See which routes are suppressed EtherChannel supports load balancing in the same port-channel link Routing Information Protocol (RIP) The BGP router appends its AS number to the AS_PATH only when the update message is sent to another AS ( EBGP peer ) . This sentence also implies another meaning, that is, if you want to modify the AS_PATH attribute, you must execute the policy on the AS border router, and the policy of modifying the AS_PATH for the IBGP neighbor is invalid. To confirm, the bridge responsible for notifying the topology change will continue to send TCN BPDUs before the bridge confirms the TCN . Next, the designated bridge will generate another TCN for its own root port , and the process is sent all the way to root . BGP routing table entry for 100.100.100.0/24, version 3 Paths: (2 available, best #1, table Default-IP-Routing-Table) Multipath: eBGP BGP , but the BGP routes ( BGP packets) between the BEs can be forwarded through the CD . For the CD , these BGP messages are regarded as normal IP packets and are directly forwarded and not viewed. R2 ignores R1 update sent over, because the "active examination", from R1 sent from the RIP updates and R2 of S0 / 0 Kou not in the same subnet, so R2 ignored R1 incoming routing updates. At this time, just validate-update-source under the RIP process of R2 . When the routing policy changes, the neighbor is requested to re-advertise the route ( BGP does not periodically send updates) Or trunk By modifying the weight to influence the routing decision Match interface matches the route with the next outgoing interface as one of the specified interfaces. Since the AS_PATH attribute does not change within the AS (only when the route leaves the AS ), the AS inner loop has a horizontal splitting mechanism, and the route reflector actually relaxes the horizontal splitting principle . This will bring some hidden dangers to the loop. Therefore, the route reflector needs to use the following two attributes to prevent loops: ! Set metric-type internal Verification Experiment 2 Impact of CLUSTER_LIST in BGP Routing Origin IGP, metric 0, localpref 100, valid, external, best Switch(config-if)# switchport nonegotiate R1R2 establishes an IBGP neighbor relationship and maintains two BGP connections. The local interface is used to establish a neighbor relationship with the peer directly connected interface. The incoming route is passed from the external AS . The NH is the EBGP peer that advertises the route , and the NH will follow the route to pass within the AS without change (unless a policy is made), always pointing to the next AS (advertise the route) the EBGP peer interfaces IP ). Ip address 5.5.5.5 255.255.255.0 The weight of the BGP route generated by the local summary is also 32768. Routing, then: 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 Both R1 and R2 are connected to the 2.2.2.0 network. At this time, R3 goes to ping 2.2.2.2 . Because the static route of the outgoing interface is used, R3 thinks that 2.2.2.0 is a locally connected network, so ARP request is sent , R1 ,ccnp tshoot network diagram, R2 , can receive the request message, and both respond to the request message (the premise two 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. Select the route with the smallest neighbor IP address ( the address of the neighbor in the neighbor configuration of BGP , that is, the update source IP of the neighbor ) Detailed rules Two-point two-way routes redistributed problems DUAL AS provides a migration solution: Allow R2 's BGP process to take into account both AS numbers, 200 and 201 , of which 200 Penalize mode shutdown (enter err-disable state) while sending an SNMP trap Next Hop C 10.1.12.0 is directly connected, Serial0/0 Create secure addresses through dynamic learning, manual configuration, and stciky In the port field of the circuit-ID suboption, the port numbers start at 3. That is to say, in this field, the port number is from 3 , the first port number is 3 , and so on. For example, a 24- port switch with an SFP slot , port3 is fast x/0/1 , port4 is fast x/0/2 , and so on, port 27 is the x/0/1 port of the sfq module . Where x is the stack member number. Set extcommunity cost pre-bestpath 1 10 Continue to look R4 result of the capture ( R3 distributed to R4 of BGP update package): MTU problem Adding redundant routing Set tag 20 Set ip next-hop ip1 Set ip next-hop ip2 Interface vlan 10 Rl , R2 , R3 using LOOPBACK neighbor relationship with the address of 1.1.1.1 , 2.2.2.2 , 3.3.3.3 , running OSPF such After the bgp bestpath compare-routerid command is configured , the principle is skipped and the route with the smallest RID is selected as the optimal. Core switch configuration: By default , the rate on the DAI untrusted interface is 15 pps , while the trusted interface is unlimited. The two exchange modes , both in principle and in terms of fast switching is very similar , such as optimum switching actually uses an optimized cache switching (optimumed switching cache), its speed is higher than usual cache is faster .distributed switching mode needs use Versatile Interface card this hardware card , also known as the VIP card. it will save a copy of their own route cache, so that when it is not necessary to wait for a query using a shared system cache (shared system buffer), whether with respect to the fast switching or optimum In terms of switching , it is faster .