ccnp switch v7 skills based assessment

ccnp switch v7 skills based assessment

Obviously this method is too poorly scalable. 14 packets, 7640 bytes 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 Arp spoofing solution Topology change process Continue to look R4 result of the capture ( R3 distributed to R4 of BGP update package): Frame check sequence FCS When a violation occurs, the interface enters the err-disable state. switchport trunk encapsulation dot1q switchport mode trunk Neighbor 10.1.12.2 remote-as 200 We expect the effect of the above configuration is implemented R1 to 100.0.1.0 routing setting MED = 100 , 2.0 disposed MED = 200 is , while R2 to 100.0.2.0 disposed MED = 100 , 1.0 arranged MED to 100 , respectively, to the respective property The EBGP neighbor takes effect, so the MED attribute will be passed along the route in AS345 and finally arrive at R4 . 100 Route-map LP permit 20 match ip address pref 2 set local-preference 100 Trunk overview Let's take a look at R4. Switch(config-if)# switchport mode access Local network and re-routed routes, LP defaults to 100 , and can be transmitted to other IBGP neighbors within the AS . The LP is unchanged unless the policy is deployed during transmission. 100 When the interface is up/down , all dynamically learned MAC address entries will be cleared. The statically configured secure address entries remain. Because ARP 's response does not need arp request is a prerequisite to send directly, so an attacker can construct arp reply message is sent to the target of attack, to refresh the attacker's arp table, to achieve the same arp deceitful purposes. The configuration of R4 is as follows: Gratuitous ARP The program seems to be able to solve the problem, but brought new problems, first of all to R1 , for example, R1 by way of re-release of the introduction of 1.1.1.0 , the route through BGP updated way to the R2 , R3 , R4 ( accessed through multiple links), this time on these routers, 1.1.1.0 route original was - incomplete ; and in order to achieve the above requirements, R2 in its local network of 1.1.1.0 ,ccnp switch v7 skills based assessment, this coming, 1.1.1.0 in R2 When a local route is imported into BGP and the AD value becomes 200 , R2 advertises 1.1.1.0 to its EBGP neighbor , and its advertisement 1.1.1.