Reference Table for Subnetting Slash Netmask Wildcard Mask /32 255.255.255.255 0.0.0.0 /31 255.255.255.254 0.0.0.1 /30 […]
High Availability with CARP and VRRP
CARP (Common Address Redundancy Protocol) is an alternative protocol to VRRP (Virtual Router Redundancy Protocol) […]
eBGP Routing Protocol on Cisco Devices
BGP (Border Gateway Protocol) is the routing protocol of the Internet, and due to the […]
Point-to-Point GRE VPN Tunnel on Cisco Devices
GRE VPN is not a recommended tunneling technology and this is just a reference guide, […]
NAT type Port Address Translation (PAT) on Cisco Devices
There are 3 types of NAT: Static NAT – Translates a private to a public […]
Working with ACLs on Cisco Devices
An ACL is a list of rules applied to an interface to control traffic policy. […]
PPP/CHAP on Serial ports using Cisco Devices
Setting a serial connection between two routers using PPP with CHAP authentication: Set PC0: IP […]
Routing between VLANs with Sub-Interfaces and DHCP
At first glance at the diagram above, it may seem like Router R1 is not […]
Multimodal Network on Cisco Devices
This multimodal network with Cisco devices was made in the simulator Packet Tracer [Networking Academy] […]
OSPF on Cisco Routers
OSPF is an open standard (non-proprietary) routing protocol. It is a link-state protocol that allows […]