ccnp switch nuggets

ccnp switch nuggets

Note also that, because the R4 and R5 for the federal EBGP neighbor relationship, so there are also TTL is 1 problems, if they use the loopback interface to establish BGP relationship, it needs to use to neighbor 5.5.5.5 ebgp-multihop 3 command. 300 {100,200}, (aggregated by 300 3.3.3.3) Match 100 Establish BGP neighbor relations switchport trunk encapsulation dot1q switchport mode trunk ? Root SW1 receives the RLQ request and immediately responds with an RLQ response to inform that it is still alive. The two networks of network 100.0 on R1 and R2 enter BGP , then the BGP table on R4 : MED Canonical Format Indicator , which is 1 bit long, indicates whether the MAC address is a classic format. RIPng 39 BGP must be identifiable and the update message must contain CLISTER_ID , then the RR will ignore this routing update. Nowadays, routing is almost as fast as switching,ccnp switch nuggets, and it can also be forwarded based on hardware. At the same time, the routing design solves the Layer 2 loop problem of the switching network and the isolation problem of the LAN . On a specific interface, if no BPDUs are received for three consecutive cycles (or max-age timeout), the STP data on the interface will age rapidly. As a result, the BPDUs are somewhat similar to the keep-alive mechanism between switches . This fast aging mechanism helps to respond quickly to topology changes. 10.10.10.0/24 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 On R10 , the route is redistributed into OSPF . R11 learns 8.8.8.0 through OSPF . On R11 , the route is: --------------- 192.168.10.1 In 802.1q the native vlan is untagged, using Dot1q switches all unmarked frame is forwarded to the native vlan in the ISL on all data frames, including native vlan encapsulation, so if the package is not received The data frame will be discarded (the ISL does not have the concept of a native VLAN ). Exit Revoked route ^10[^0-6]$ 10.1.34.3 from 10.1.34.3 (3.3.3.3) Each cluster has a unique cluster ID Load balancing methods Native Vlan Access-list 1 permit 10.1.1.0 10.1.13.1 Redistribute ospf 1 match external 1 external 2 The first 8 bits of the route must match the first 8 bits of 172.0.0.0 , the other bits are not concerned, and the mask must be /8 . Source of routing information: How is this route learned, for example, static, or through OSPF , IS-IS , R2 , R3 , aiming RIP create static routing domain summary route, point null0 , while only these static routes redistributed into OSPF , and indeed can play a sub-optimal paths to avoid the question, but: SW1(config)# interface vlan 10 Of course, the subnet 172.16.0.0/16 can be further subnetted to get 172.16.10.0/30 or even 172.16.10.1/32 , then if these prefixes exist, when I am going to find 172.16.10.1 , who's What is the highest match? Obviously, is the host prefix of 172.16.10.1/32 , or host routing? This is the longest match principle . Command Troubleshooting 39 Command If the interface is trunk , set the trunk protocol type Set ip next-hop recursive Matching 100 , 101 , 102 , 103 , 104 , 109 which AS_PATH Set extcommunity cost pre-bestpath 1 10 To control, the most simple and convenient. Route accurate summary algorithm By default, this database is dynamic, which means that when the switch is restarted, all entries in the database are lost. The result of this event may cause network disruption. So we can store this database as a file, this is the DHCP snooping database agent . The configuration command is very simple, global command: Network 30.30.30.0 mask 255.255.255.0 ? 8 _100$ This attribute may not be supported. Unrecognized BGP processes ignore update messages containing this attribute and are not passed to other BGP neighbors. Request specific routing information: When it is necessary to know the information of a specific route or some specific routes, the request message will be sent together with the routing entry of the specific address. The device that receives the request will process the entries one by one according to the request message and form a response message. Bgp dampening half-life reuse limit limit limit maximum inhibition time Comparative principle 192.168.1.0 will pass the default route of 0.0.0.0 into RIP , and R2R3 will learn. At the same time, R4 also received the 100.0 route introduced by R2 , but it was not passed to R3 . This is the principle of horizontal splitting of IBGP : " BGP routers will not pass IBGP to him and pass it to other IBGP neighbors." Double-point bidirectional routing re-release 91 Use a hold-down timer to prevent routing loops * i Router(config)#router rip Learning from other sources, the routing source is incomplete (confirm that the source of the routing information is incomplete). ( Republish IGP or static ) 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 community-list 11 permit 100:11 no-advertise Errdisable recovery cause arp-inspection Then there is a problem. After the device goes online, what if we want to change the configuration of the device and manage these switches? Is it necessary to take a laptop with a console cable down to the machine room for on-site debugging? This method of twisting is completely unreasonable, right, it can be managed remotely by telnet or other means. On the router telnet we are very familiar with, as long as three up, you can telnet to the router, then it follows that we take a look at how to manage the switch.