I understand that this command enables spanning-tree with all these features on all access-mode ports.My issue is that a firewall sent out a BPDU while rebooting and the port on the switch where it is attached was put on err-disabled. This cause a downtime ...
A VPN connection to a business's main office can help its employees be productive when they're on the go. chokkicx/Getty Images As a business grows, it might expand to multiple shops or offices across the country and around the world. To keep things running efficiently, the people workin...
As already mentioned by@MHM Cisco World, in your example, disconnecting from the original port will cause that switch to flush its MAC/port entry. But suppose you had: PC<>sw1<>sw2 When you disconnect PC sw1 will flush the MAC but sw2 will not! If will continue to send P...
On Cisco Nexus 9300 Series switches, the Application Centric Infrastructure (ACI) leaf line card is used in order to enforce the QoS classification policies applied on 40G ports. It has 768 TCAM entries available to carve in 256-entry granularity. These region names are prefixed with ns-. For...
How to migrate Cisco ACE configuration to NGINX, with detailed examples Why you should go with a software load balancer, and not hardware This short review comes from this book or the store. External Resources Nginx official :black_small_square:Nginx Project ...
Overloading - A form of dynamic NAT that maps multiple unregistered IP addresses to a single registered IP address by using different ports. This is known also as PAT (Port Address Translation), single IP address NAT or port-level multiplexed NAT. In overloading, each computer on the privat...
How to migrate Cisco ACE configuration to NGINX, with detailed examples Why you should go with a software load balancer, and not hardware This short review comes from this book or the store. External Resources Nginx official :black_small_square: Nginx Project :black_small_square: Nginx Documenta...
Once security admins find out which ports respond as being open, they can review whether these ports need to be accessible from outside the corporate network. If not, security admins should shut them down or block them. If the open ports are deemed necessary, admins should begin to researc...
Open ports, if not correctly configured and protected, provide a doorway into a device and the network it's on. An open port 139 that allows inbound traffic from all external IP addresses is extremely dangerous. Any shared resources are exposed to the public internet. An attacker could also...
Hi everybody, I'm hoping you can help. I'm looking for away to test all ports on a Cisco Switch. Im pretty new to all this, i can configure a vlan or port...