1. Question: If the switch is enabled with dhcp snooping and the trusted interface is configured.The address acquisition is slow or the address is not obtained. Answer: Maybe the snooping entry of dhcp is full. If the snooping entry is full, the switch

1. Question: How to turn off the authenticity detection information of the optical module? Answer: It is not the original log prompt message to close the optical module: fiber antifake Ill 2. Question: The intranet server is mapped to the public net

1. Question: The log prompts the interface to receive the spanning tree timer timeout information? Answer: Close the interface BPDU, the log will not prompt. 2. Question: How do I download files in shell mode? Answer: run-system-shell Cd /var/

For a while, Beijing sent us a router with a 12-year licensed software version and the description is self-destruction for 12 years. Let's look at this case: 2901(config)# do sh lice all Evaluation total period: 608 weeks 2 days Evaluation perio

In and out are relative, for example: A(s0) — — -(s0)B(s1) — — — — (s1)C Suppose you want to reject A to access C now, and assume that you are required Is to do ACL on B (of course C can also), we replaced this topology with an example: B’s s0 port is the

1. Network Cutover Overview I want to make it clear that the concept of "network" . It does not refer to small-scale networks such as small home broadband, but large and medium-sized commercial networks, such as enterprises, financial institutions, gov

Telnet *.*.*.* The device to be telnet needs to set the password of line vty. If you need to enter privileged mode, you need to configure it. Enable password Show users (check "Who" is logged in locally) Show sessions (view "I" telnet outgoing se

The three-tier architecture of the network: 1. Access layer: Provide network access points, the corresponding device ports are relatively dense. Main equipment: switches, hubs. 2. Convergence layer: The aggregation point of the access layer can prov

7609 FWSM module FAILOVER configuration This configuration is very simple, only the script is posted, mainly in the project, you may encounter Configuration above 7609 firewall module 1 vlan-group 10 firewall module 5 vlan-group 10 firewall