ccnp switch kurs

ccnp switch kurs

Configuration Revision 15 Maximum route entry Deployment Highlights 63 Switchport mode private-vlan host R1(config)# access-list 1 deny 172.16.32.0 R1(config)# access-list 1 permit any BGP table version is 3, local router ID is 4.4.4.4 As shown above, the position of the line is 16+4=20 , so we get the summary address: 192.168.0.0/20 , which is the most accurate summary address. Neighbor RC-ip remote-as 100 : 1 Router bgp 300 Network 20.20.20.0 mask 255.255.255.0 ( 802.1D is always 0 ) 100 technical background The connection is established in advance and the data is transmitted, and the reliability of the data is guaranteed during the transmission. Ip address 10.1.12.2 255.255.255.0 IP Address ? Flash: Database agent URL AS Hops 1 Neighbor 10.1.23.3 local-as 201 no-prepend replace-as dual-as 8 bits Suppress-map unsuppress-map advertise-map inject-map All VLANs Neighbor 3.3.3.3 remote-as 345 Instead of choosing R3 ? This is determined according to the routing principle of BGP (see the BGP document of Red Tea Three Cups Zhu SIR ). Here, the final impact of routing is such a rule "preferred routing from EBGP neighbors (relative to IBGP neighbors) "), R2 is the EBGP neighbor of R5 , so it is preferred. Ip summary-address rip xxxx yyyy // Note that this summary does not support CIDR supernet . ? Router ospf 3 Command Summary B performs the corresponding checksum confirmation according to the type of the connection, and after confirming by these checksums, it is sent to the upper layer. In fact, the establishment of a BGP neighbor relationship requires only one connection. The configuration shown in the following figure can also establish a BGP connection: Abc*d Neighbor xxxx advertise-map xx exist-map xx Sending when an error is detected usually leads to the termination of the BGP connection Note that the BGP created by R3 uses the AS number of 64512 , which is the federate member AS number instead of the federated AS number. Active If the route learns to a non- client IBGP peer , it is reflected to all clients and EBGP neighbors. AFI ( Address Neighbor 10.1.23.2 route-map setCommu in 192.168.12.2/24 100 i Ip route 0.0.0.0 0.0.0.0 serial s0/2 Lead ( PreambIe ) Note that community is not sent by default and must be send-community . Version Add configuration on SW2 : (global configuration mode) ip dhcp relay information trust-all Y 100 * i100.0.2.0/24 ? Ip policy route-map PBR Detailed rules A route-map containing a set of match statements can be defined in advance as a list of commands called a policy-list. Passive-interface configuration 51 Add all 3.5 RSTP (802.1W) The same prefix is ​​obtained through different protocols, first than AD , and later than metric 8 The idea of ​​configuration is that on R2 , you want to grab the fast0/0 port (that is, the one sent by R1 ) and go to the traffic of 30.30.30.0/24 . Of course, this time 1.1.1.0 is unable to access 3.3.3.0 , because R3 does not have a route in the RIP routing domain (that is, there is a problem with the backhaul routing, data communication must always consider the round-trip path,ccnp switch kurs, remember), so if To achieve network-wide interworking, you need to be on R2 : Root port: The interface that receives the optimal BPDU is the root port. This is the closest ( cost minimum) interface to Root . Introduction and delivery of BGP routes 6 ? AD If the BGP route is locally originated (network or the redistribute) in , carries the MED to a value EBGP Peer The routing protocols that support TAG are: RIPv2 , EIGRP , OSPF , ISIS , BGP CEF form Let's look at the picture and deploy a two-way re-release on R2 and R3 . * i Introduction and delivery of BGP routes 6 So in fact this is a macro command Ip arp inspection validate { [dst-mac] [ip] [src-mac] } OpenSent ? The least significant bit of the LSB indicates the TC flag; the most significant bit of the MSB indicates the TCA flag. Network xxx mask yyy route-map zzz Ip prefix-list 30 permit 30.30.30.0/24 route-map setComm permit 10 3.3.3.3 This is the typical recursive route of BGP . The next hop of the 3.3.3.0 route on R1 is 2.2.2.2 , further recursive 2.2.2.2 , and the associated outbound interface S0/0. BGP comes in 1 and other routes are 20 , and the metric between OSPF remains unchanged. If there is a tag , it is determined whether the trunk port allows the VLAN frame to enter. Allow the next step, otherwise discard the frame. The configuration commands are as follows: The rules for BGP next-hop are as follows: 1 Ip address 10.1.13.1 255.255.255.0 On the other hand, we capture the package: In R3 on Information, so that ISP1 is hanging, so the data of the PC accessing the 100 network is switched to ISP2 , and the network is constantly Router ospf 1 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. R1(config-router)#distribute-list 1 in ? // All interfaces If a psec port is punctured into err-disable , you can use the following methods to restore the state of the interface: The next hop of the path is unreachable. 1 : Request message, requesting all or part of the routing information from the neighbor; ORF 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. 3.3.3.3 !! Match, go this one Virtual-PPP Virtual PPP interface Virtual-Template Virtual Template interface Sw1(config-if-range)#no ip address The keyword should be added, otherwise the main class route will only be re-published. 3 jumps. The configuration is as follows: Configuration Example The second command is to adjust the AD value for external routes, inter-area or intra-area routes . The same community VLAN can communicate with each other, but the community VLAN must be set up by SVI or router interface to communicate. We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows SW1(config-if)# switchport nonegotiate * i100.0.1.0/24 Confirmation of TCA ( MSB set) to the previous switch. When the root receives the TC , it sends the TCA back to the original sending switch and sends the TC ( LSA set) to all bridges . Switch receives ROOT issued to TC after, will MAC aging time address table is reduced to 15s ---- -------------------- The route to the LOOPBACK interface. OpenConfirm For more detailed BGP state machine and neighbor relationship establishment process, please see the note document: " BGP State Machine and Neighbor Relationship Establishment Process" Path ... (maximum 25 ) When we set the number of MAC addresses allowed on the interface to 1 and set a secure address for the interface, then this interface will only be for that MAC. Set ip next-hop recursive The Permit/deny keyword has a different role in different deployment scenarios. Let's take a look at the role of these well-known values ​​of community : For 802.1D , when a port is elected as the designated interface, which from blocking to forwarding at least 30S of time. However, in RSTP , the proposal/Agreement mechanism enables the interface to complete a fast, reliable transition in seconds. RFC1724 Not advertised to any peer Local 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: The MAC address in the ARP table is all zero ( Windows host) or " No completed" (network device) By default, no rate limit is configured. You can not route the network , but the origin of the route, configure a summary static, and then network the summary route, this method is not recommended. *>i Configuring Example 6 Deploying Distribution Lists When Republishing Between Protocols 200 Note: If CDP- based detection and object tracking- based detection are applied, the latter is preferred. We found a very strange phenomenon. R4 eventually went to 100.0 and both networks chose 3.3.3.3 as the next hop instead of metric . Why? Originally, the MED attribute, the BGP router only compares the MED values of the routes originating from the same host by default , and R1 and R2 belong to AS100 and AS200 respectively . Then, for R4 , the two paths of the 100.0.1.0 route are from different ASs , the default It bypasses the MED comparison, and finally, the rule that affects the routing is: " The RID of the BGP neighbor (the smaller the priority).