A portchannel is a technique used in computer networking to combine multiple physical network links into a…
Practicable
7 Articles
I am hands-on in any project that I am associated with. I just don’t want to put my face or name and lend it to a product that I’m not behind a hundred percent.
Context-based access control is a firewall software feature that intelligently filters TCP and UDP packets based on…
Dynamic Access Lists solve a different problem that traditional ACLs cannot solve quickly. Imagine a few users accessing a set of servers. ACLs match user host IP addresses. The legitimate user’s IP address changes if she borrows a PC, uses DHCP, takes her laptop home, etc. Each new IP address requires editing a traditional ACL. This caused painful administration and security holes.
An extended access list, a reflexive access list allows for the dynamic combination of two access lists. If the outbound access list recognizes a remote connection, the inbound access list will be activated to permit bidirectional traffic. With the conclusion of this interactive session, the remote host is once again denied access to the inbound access list.
Authentication is key to OSPF because only authorized devices can share routing information and change the network. This blog post will look more closely at OSPF authentication methods and why it’s important.
Cisco Catalyst 9000 StackWise Virtual Link merges two physical switches into one. Both switches’ configuration and forwarding state are identical. This technology improves the network availability, scalability, management, and maintenance.
This article will discuss how to upgrade IOS-XE on switches belonging to the catalyst 9000 series.