How to configure RADIUS on Cisco switch (IOS)

Technology: Security Area: AAA Vendor: Cisco Software: AAA feature compatibility required Platform: Catalyst platforms, Routing platforms   Introduction RADIUS is a security feature working in client/server mode. It provides authorization access to the network and combines the authentication and authorization processes. What’s essential, RADIUS cannot control the authorization level of users. Nowadays, all RADIUS server […]

Technology: Switching Vendor: Cisco Software: IOS-XE 17.3.1-17.9.2. Platforms: Catalyst Switches Serie 9200, 9200L, 9300, 9300L, 9300X, 9500.   Preparing the Meraki dashboard (pre-check) Check if you have access to the Meraki dashboard. You can register for free, instructions here. Obtain an API key from your existing dashboard. First, check that “Dashboard API Access” is checked in […]

Technology: Routing Area: NHRP Vendor: Cisco Software: 10.0, 10.2-3, 11.0-3, 12.0, 12.0T, 12.1, 12.1T Platform: Catalyst platforms, Routing platforms The Hot Standby Routing Protocol HSRP is a proprietary protocol from Cisco. It is a routing protocol that provides backup to a router in the event of link or hardware failure. Using HSRP, several routers are connected […]

Technology: Switching Vendor: Cisco Title: MST – Multiple Spanning Tree Protocol (802.1s) Software: 12.X , 15.X Platform: Catalyst 2960, 3560, 3750, 3850, 4500, 6500   MST was developed to reduce the number of spanning tree instances to a reasonable value thus reducing CPU cycles needed to calculate STP for each VLAN separately. Most networks have […]

Technology: Switching Vendor: Cisco Title: DTP – Dynamic Trunking Protocol Software: 12.X , 15.X Platform: Catalyst 2960, 3560, 3750, 3850, 4500, 6500   Cisco proprietary protocol used to automatically negotiate the formation of Trunk between two switches. Port can be configured in one of the below states: Dynamic auto – passive mode, allow to form […]

Technology: Routing Area: NHRP Vendor: Huawei Software: eNSP Platform: Routing Platforms The Virtual Router Redundancy Protocol (VRRP) groups multiple routing devices into a virtual router and uses the virtual gateway device’s IP address as the default gateway address. When the gateway fails, VRRP selects a new gateway to transmit service traffic to ensure reliable communication. […]

Technology: Routing Area: NHRP Vendor: Cisco Software: 12.X , 15.X Platform: Catalyst platforms, Routing platforms The Virtual Router Redundancy Protocol (VRRP) is an election protocol that dynamically assigns responsibility for one or more virtual routers to the VRRP routers on a LAN, allowing several routers on a multiaccess link to utilize the same virtual IP […]

Technology: Routing Area: NHRP Vendor: Cisco Software: 12.X , 15.X Platform: Catalyst platforms, Routing platforms Gateway Load Balancing Protocol (GLBP) is one of the NHRP kind protocols that protects traffic from a router or circuit failure. GLBP behaves very similar to Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP). GLBP communicates over […]

Technology: Switching Area: STP Vendor: Cisco Software: 12.X , 15.X Platform: Catalyst platforms Portfast feature causes a switch port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states. Portfast on switch ports connected to a single workstation or server allows those devices to connect to the network immediately, instead of […]

Technology: Switching Area: VLANs Vendor: Cisco Software: 12.X , 15.X Platform: Catalyst platforms VTP servers advertise their VLAN configurations to other switches in the same VTP domain and synchronize their VLAN configurations with other switches based on advertisements received over trunk links. VTP server is the default mode. Server mode on switch is typically configured […]