ccnp r&s or security

ccnp r&s or security

Open loopback on R2 , IP is 172.16.10.0/24 , 172.16.11.0/24 Set ip address prefix-list 10.1.23.3 from 10.1.23.3 (3.3.3.3) Example 1 : Using route-map to associate neighbor filtering routes R2 becomes the demarcation point between RIP and OSPF domains. So how can I let R1 learn the route from OSPF and let R3 learn from RIP? IP policy routing is disabled Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing Routing-based Policy ( PBR ) PBR Except none STP uses four parts to solve the Layer 2 loop: 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: The original attribute is i , so R3 and R4 learn BGP route 1.1.1.0 from R1 and R2 at the same time . After the decision, the traffic to 1.1.1.0 will be sent from R2 to R1 , so the sub-optimal path is obtained. Rcp: Database agent URL Port ID ( 2 bytes) = Port Priority (1 byte ) + Port ID (1 byte ) The configuration of R2 is similar to the above. The key is to look at the configuration of R3 : No-advertise no-export Next Hop R1(config-route-map)# match ip address prefix-list list1 Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd The default is 32 Tiao ------------------ 00:B0:64:04:09:99 Roo also received the request, and the request it received from the network segment 172.16.20.0 , and the table found that the network that the route to the host Milne is located ( 172.16.21.0 ) is different from the network that received the arp request packet. And the interface opens the arp proxy, so reply to its own interface mac. Experimental phenomena: Track 2 rtr 2 reachability R2(config-router)#redistribute rip subnets After the DAI is enabled, if the downlink PC sends a large number of invalid ARPs in a period of time , it may cause a large loss of switch performance, that is,ccnp r&s or security, 200 Len : Number of bytes of Sub-option Value , excluding two bytes of SubOpt and Len fields Ip address 10.1.25.5 255.255.255.0 Switch(config)# spanning-tree portfast bpduguard default As the next hop to 100.0.1.0 and 2.0 . In the R4 on Configuration example Can be detected when a violation time occurs, and can be punished 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." Implementation point 42 Offset-list offset list In 802.1D , the TYPE field uses only the highest and lowest bits to indicate TC and TC acknowledgment, and RSTP extends this field: 3.3.3.3 Option82 DTP enables trunk negotiation between switches Access switch configuration: If a psec port is punctured into err-disable , you can use the following methods to restore the state of the interface: Private AS number Configure the aging time type. If you select absolute , that is, absolute time, you need to use the aging time command to set the specific value of the aging time. After the command is pressed, all the security address entries built by the dynamically learned MAC will start. The aging time countdown. If it is the inactivity keyword, the countdown will only start when the dynamic security address entry is inactive (for example, if the host is offline or hanged).