ccnp 300-101 cbt nuggets

ccnp 300-101 cbt nuggets

Set default interface specifies how to send such a packet IP Address Max age If the currently configured keepalive timer is greater than min ( holdtime ) /3 , then int[min ( holdtime ) /3] Offset list In a route-map statement, if there is no match statement, match all Access-list 11 permit any route-map adv permit 10 match ip address 11 router bgp 12 Router ospf1 Router bgp 300 The parameters and capability features are negotiated successfully. You start to send the Keepalive package and wait for the other party's The Protected port feature cannot be configured across switches: Access-list 1 permit 100.1.1.0 In a DHCP snooping environment (deployed on a switch), we consider ports as either trust or untrust , which is a trusted or untrusted interface. On the switch, configure the interface connected to the legal DHCP server as trust . Only received on the trust interface RIP-2 Only Ip arp inspection trust Path After 10.30.0 is passed to R3 , since the RIP updated subnet and the R3 interface subnet belong to the same main class network, R3 receives the update, and uses the interface mask as the mask of the RIP route, so the R3 routing table The route loaded in is: 10.1.20.0/24 Local origin R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. Comparative principle So match interface is a match with the outbound interface attribute, and this ? 1 Neighbor 10.1.23.2 remote-as 200 Match ip address pref 1 set local-preference 200 RR self-originated route The following are five types of BGP packets and packet parsing: Experiment 3: Weighted extension Client-identifier unique-identifier *>i100.0.2.0/24 [Experiment 4 ] There is a main class network; there is a subnet route (match), the longest match Solution to provide more bandwidth The ETHERNET_SNAP standard was developed by the IEEE 802.1 committee to ensure interoperability between IEEE 802.3 LAN and Ethernet. SW2 is the core layer switch, deploying DHCP relay Active is 10.1.1.252 (primary), weighting 100 (expires in 7.028 sec) Arp replies sent: 1 1.0.0.0/8 route Y The next hop of 1.1.1.0/24 , because the AD value of OSPF is better than RIP . If R1 is configured as follows: Routing entry for 8.8.8.0/24 Le keyword is not written, then the default is greater than 24 less than 32 PVLAN considerations Advance The redistribute local route learned from the IGP routing protocol enters BGP , and the MED value inherits the metric in the IGP protocol. Focus on the configuration of GW : 10.1.13.3 After the basic BGP configuration is complete , R1 establishes an EBGP neighbor relationship with R3 , R2, and R5 . R3 establishes an IBGP neighbor relationship with R4 , R4, and R5 (using the LOOPBACK interface as the update source). The Permit/deny keyword has a different role in different deployment scenarios. Fa0/20 Start a TC while timer for the root port and all non-edge designated ports . The timer value is equal to 2 times the hello-time timer. If the outbound interface is a broadcast interface, it may impose an additional burden ( ARP ) on the nodes under the interface or cause potential problems. Router bgp 12 RouterB routing 100.100.100.0/24 passed to A , NEXT_HOP is 10.1.123.2 ; Now we consider that when R1 originates an OSPF internal route, both R2 and R3 can learn this route. Then on R2 , the route is re-released from process 1 to process 2 , and finally R3 will learn the route from R4 . So for R3 , the dual OSPF process, 100 i Sourced in sev-epoch 1 Encap length 14 Router bgp 11 When R2 Native vlan No off default route above configuration, adding a destined 13.0 network routing next hop is R3 , the PC to 13.0 data network switch to R3 proof ip default next-hop priority routing detail below, above Default route. The next hop (the Next Hop) - if present , it identifies a better than advertised router address of the next hop address. In other words , the next hop address it noted , that in the same measure than - advertised subnet router closer to the destination. If this field is set to all 0s (0.0.0.0), the address of the advertising router is the optimal next hop address. The mapped ethernet vlan will be blocked Address 10.1.12.1(10) Network 20.20.20.0 mask 255.255.255.0 Origin AS-Path Next hop access-list 1 deny 172.16.32.0 0.0.0.255 In fact, this is more a problem, because such an approach, in fact, the last 8 bit group no matter what, will be live match, he is even more imprecise. Ip route 0.0.0.0 0.0.0.0 null0 router bgp x Weight Access-list 1 deny 192.168.13.0 access-list 1 permit any Ip dhcp pool BIND TCN BPDU Overview Source of routing information: How is this route learned, for example, static, or through OSPF , IS-IS , Reset BGP connection 100 Load balancing: round-robin Group members: Subopt : sub-option number, if it is circuit ID , the value is 1 , and the remote ID is 2 Re-routing interface connecting the local release, static routing weight is 32768 *>i1.1.1.0/24 100 200 i If the interface is trunk , set the trunk protocol type  open Protocol overview Access port processing frame process Configure the Port-Security penalty mechanism ? Port Neighbor maximum-prefix 300 90% warning-only Neighbor 3.3.3.3 route-reflector-client Path cost R3-R4 ; R4-R5 ; R3-R5 maintains IBGP neighbor relationships and uses their respective LOOPBACK ports as update sources and establishes No BGP session will be established before xxx In 802.1D , the TYPE field uses only the highest and lowest bits to indicate TC and TC acknowledgment, and RSTP extends this field: R1(config-router)#summary-address 10.0.0.0 255.0.0.0 tag ? Automatic summary EIGRP is run between R1 and R2 . At the same time, R1 and R2 announce their respective LOOPBACK interfaces in the EIGRP process. Source of routing information: How is this route learned, for example, static, or through OSPF , IS-IS , Based on UDP protocol ports 67 and 68 basic concept Dynamic routing protocol port number or protocol number If the interface is trunk , set the trunk protocol type In this way, the summary route inherits the detailed AS_PATH attribute, so atomic_aggregate is redundant. Therefore, in the above case, the generated summary route does not carry atomic_aggregate . Let's see: RIP and OSPF 5.5.5.5 ? Tables Access-list 1 permit 172.16.1.0 route-map unsupp permit 10 match ip address 11 Modify the AD value of EIGRP 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. BGP router identifier 10.1.13.3, local AS number 345 In 802.1D , the TYPE field uses only the highest and lowest bits to indicate TC and TC acknowledgment, and RSTP extends this field: BPDUguard CAM table Looking at the BGP table of R4 , we find that: We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows MED , choose 3 100 i This fulfills the demand. Metric Preferred routes sent by EBGP neighbors (relative to IBGP neighbors), preferred federated EBGP routes in federated EBGP and IBGP SW3 receives this BPDU , but finds that this BPDU is less preferred than its own locally stored BPDU , so the BPDU is ignored. Set ip next-hop 11.1.1.2 exit First of all, the route-map is a very important tool, and it is used in a wide range. When defining a route-map , we use the route-map keyword to associate a custom parameter, such as test . A route-map list by the test string unified representation, you may be in one route-map define a plurality of sequences, a sequence number to a decimal representation, such as the figure above, 10 , Route-map 55 If the route is marked d , it means that the route is suppressed. If it is h , it means that the route has signs of flipping. Deployment Highlights 63 Pointer to the target: The pointer does not point to the router's direct connection to the destination network or to another router address in the directly connected network , or to the local interface of the link. A router that is closer to the target network is called a next hop router. None R4#sh ip b If R1 turns on auto-summary and network 1.0.0.0 , R2 can learn summary route 1.0.0.0/8 When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 Origin Corresponding hwidb fast_if_number 4 Corresponding hwidb firstsw->if_number 4 Internet address is 10.1.12.2/24 At the same time network 1.0.0.0 , then 1.0.0.0 will be announced case study 4. Proposal/Agreement Sequence meaning Neighbor 4.4.4.4 ebgp-multihop 4 Deployment points Host 192.168.1.111 255.255.255.0 R5#show ip bgp 11.11.11.0 R2(config-router)# distribute-list 1 out fa 1/0 Dialer Dialer interface 3.3.3.3 FastEthernet0/0 Ip default-network 172.16.0.0 Next, let's take a look at several exchange methods. Some of the contents of this section are excerpted from the network, thanks to the original author's sharing. By AS_PATH influence route selection Length of the circuit-ID type The MAC address is burned in the ROM of the Network Interface Controller (NIC ) . Y Trunking IP Routing Overview Path 100 300 When the link between R1 and R3 fails, the same network will still have problems. Because R2 re-releases the locally configured static summary route into the Types of 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 . Switch(config)# spanning-tree vlan vlan-id priority pri Set ip next-hop Ip address 192.168.10.254 255.255.255.0 Precautions: TCP / IP Volume II of this note contains TCPIP Routing Volume BGP almost all the content parts, and a detailed expansion Show ip dhcp database Displays recent activity on the DHCP database Sending when an error is detected usually leads to the termination of the BGP connection In CEF , there are two main types of load balancing, based on messages and based on purpose. Router bgp 200 Configuration command 46 Match abcd , abccd , abcccd, etc. R1(config-router)# network 11.11.11.0 mask 255.255.255.0 1 network entries using 117 bytes of memory 1 path entries using 52 bytes of memory Ip dhcp snooping Ip community-list 11 permit no-export route-map test permit 10 Do the following configuration on R2 and test it ( all tested in no ip classless and closed ip cef environment ): AS_CONFED_SEQUENCE A list of ordered AS numbers on a path to a particular destination. Peer group (Optional) Configuring the security address aging time The weight of the BGP route generated by the local summary is also 32768. As mentioned above, a route is allowed to carry multiple community values ​​to form a community list. If you want to delete one or several community values, for example,ccnp 300-101 cbt nuggets, Port VTP version running VTP Domain Name VTP Pruning Mode VTP Traps Generation BGP configuration Origin codes: i - IGP, e - EGP, ? - incomplete The associated PC service, that is , the data frame whose source is the MAC , can enter the interface. Switchport trunk encapsulation ? switchport mode trukn switchport nonegotiate 0xFFFF (Optional) Configuring the security address aging time The number of messages sent by MsgSent to the neighbor 10.1.23.2 from 10.1.23.2 (10.1.23.2) Distance 130 10.1.12.1 0.0.0.0 1 0 packets, 0 bytes switched through the prefix tmstats: external 0 packets, 0 bytes The configuration of R1 is as follows: Timers Ip address 100.0.1.1 255.255.255.0 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. Route-refresh Configure RIP unicast updates: 1,10,20,30 Static route associated with the outbound interface Ip community-list 1 permit no-export route-map test permit 10 For details on the related fields of the BGP table, see the show section of the BGP Configuration section of this document. The route to the LOOPBACK interface. C 192.168.12.0/24 is directly connected, Serial0/0 1.0.0.0/24 is subnetted, 1 subnets Port Basic VLAN communication principle Switchport mode private-vlan promiscuous Switchport private-vlan mapping add 100 101 Do not advertise to any peer (well-known community) Do not export to next AS (well-known community) Port Match ip address 1 set metric 10 <100-500> Community list number (expanded) expanded Add an expanded community-list entry Adding redundant routing The default is 10 , this default value is generally sufficient. METRIC A default route will be published into the RIP and passed to other routers. For example, R1 , R2 , and R3 run RIP and open loopback on R1 . Ip arp inspection validate { [dst-mac] [ip] [src-mac] } LOCAL-PREFERENCE Redistribute ospf 3 subnets route-map OSPF3to2 DHCP 3.3.3.3 1.0.0.0/8 route Path Ip prefix-list ABC seq 5 permit 172.0.0.0/8 ge 24 If there are routes with the same prefix as follows (the default is sorted in reverse order of route acceptance order) CISCO routers have two ways to find the global lookup of routes: classful ( Classful ) lookup mode and classless ( Classless ) lookup mode. Exactly the same, except that the list of AS numbers belong to the local Federation AS Ip address 10.1.13.3 255.255.255.0 Ip as-path access-list 2 permit _2$ The number of messages received by MsgRcvd from neighbors Routing table Verify set ip default next-hop Ip route 172.16.3.0 255.255.255.0 172.16.12.3 Basic knowledge point Network Next Hop Metric LocPrf Weight Path This environment is relatively simple, PC and DHCP server in the same VLAN , I mainly want to confirm that the ordinary switch pair is carried Y Although the network devices are in the same subnet, they belong to different pVlans , and communication between pVlans must be implemented through the default gateway. Private VLAN ( PVLAN ) Knowledge review Distance vector routing protocol 28 Solution 3 : DAI R1 , R2 , and R6 advertise the routes of their respective ASs through EBGP . In AS345 , these routes are re-advertised into OSPF , and then advertised back to BGP on the other two routers , and then advertised to their EBGP peers . . Network 10.1.34.0 0.0.0.255 area 0 ? : 1 When the switch receives suboptimal BPDUs from other designated switches or root bridges , 802.1D encounters this situation by first ignoring these suboptimal BPDUs . The configuration of R3 is similar. 4.3.2 Message Type 35 A advertises the detailed route to B , B advertises the detailed route to C and D , and C advertises the summary route. At this time, the summary route will be transmitted to B in addition to being notified to D , and this may cause problems. Therefore, you need to filter the summary route on the IP distribution-list x of neighbor B on C. Otherwise, a routing loop will occur. ? R8 to re-advertise 8.8.8.0 into the BGP , has spread to R10 , the R10 on the route AS_PATH is 98? , Ip route 172.16.0.0 255.255.0.0 192.168.12.1 Paths: (2 available, best # 2, table Default-IP-Routing-Table) Flag: 0x820 Experiment continued, after the above configuration, R4 has passed BGP learned from the R1 two of BGP routes. MTU? Refers to the second floor of the MTU , which is the interface MTU , refers does not contain a two-story frame header, Payload of MTU , the MTU value is generally not manually modify the default is 1500 bytes. Thus CISCO router supports Layer 2 data frame is a maximum value 1500 of payload plus the floor layer 2 frame header and the FCS : Objective MAC . 6 bytes + source MAC . 6 bytes + type field of 2 bytes + the FCS . 4 bytes So the total is 1518 bytes.