Introduction to VDC Part 2
Interface Allocation to VDC --> By default, all the physical interfaces belong to Default VDC. --> When you create any new VDC in Nexus 7K we need to manually allocate physical interfaces to it. --> When you move the interface from default VDC to New VDC, all the config…
Read more
Introduction to VDC Part 1
Introduction to VDC --> VDC stands for Virtual Device Contexts. --> By using VDC we can divide one physical Nexus Switch into one or more logical nexus switches. --> VDCs are similar to Context in ASA or SDR in IOS XR. VDC Advantages 1) Can provide managed services to c…
Read more
What is Passive Interface?
--> Passive Interface is a feature used by routing protocol to stop sending updates on the particular interface. --> Basically this command is applied on the router interface which is connected to LAN or Loopback. --> Routing updates are only understood by the routers. …
Read more
What is the difference between Flex Stack, Flex Stack Plus, Flex Stack Extended, Flex Stack Extended Hybrid?
Flex Stack: --> FlexStack technology works only on Cisco Catalyst 2960S series switches. --> FlexStack technology allows you to connect up to 4 switches in a single stack. --> In order to use FlexStack Technology Cisco 2960S switches uses a special module C2960S-STACK a…
Read more
Understanding Cisco Switching Database Manager
--> SDM stands for Switching Database Manager. --> Multi-Layer Switches provides switching as well as routing functions. --> SDM is used on Multi-Layer Switches to manage the memory usage ( Memory should be assigned for routing or switching). --> If you want to use M…
Read more
What is Supervisor Redundancy?
RPR --> RPR Stands for Route Processor Redundancy --> In RPR mode, the active supervisor does not synchronize configuration changes or state information with the standby supervisor. --> The standby supervisor is only partially initialized and the switching modules on th…
Read more
Introduction to FTD
--> FTD stands for Firepower Threat Defense. --> The Firepower Threat Defense software, is the unified operating system which provides following services in a single image, i) Built-in stateful firewall ( Used to filter the packets based upon Layer 3/4 information) ii) …
Read more
How to configure ASA Active/Standby Failover??
ASA1 Configuration S1: Configure the interfaces as shown in the topology. ASA1(config)# interface g0/1 ASA1(config-if)# nameif Inside ASA1(config-if)# Security-level 100 ASA1(config-if)# ip address 192.168.1.1 255.255.255.0 standby 192.168.1.2 ASA1(config-if)#exit ASA1(config)# …
Read more
What is ASA Active/Standby Failover?
--> Active/Standby failover allows you to use a standby ASA, In case of Active ASA fails. --> When the active ASA fails, it changes to the standby state while the standby unit changes to the active state. --> Now the Standby ASA that becomes active assumes the IP addres…
Read more
Introduction to ASA Firewall
-->ASA is an application-aware stateful packet filtering firewall. --> Inspects all the packets which are passing through the firewall. --> Each and every interface on ASA requires configuration of following things, 1) Interface Name 2) Security-level 3) IP Address --&g…
Read more
How to Configure Site to Site VPN on Cisco Routers
BR1: 1) Configure the ISAKMP Tunnel From BR1 to BR2 router ( Phase1). BR1(config)# crypto isakmp policy 1 BR1(config-isakmp)# encryption 3des BR1(config-isakmp)# hash md5 BR1(config-isakmp)# authentication pre-share BR1(config-isakmp)# group 2 BR1(config-isakmp)# lifetime 8640…
Read more
What is Dual Active Detection in VSS?
--> A Virtual Switching System is formed by using a VSL (virtual switch link) between both switches of 4500 or 6500 series. --> In VSS, one switch acts as Active Switch and other as Standby Switch. --> If the VSL Link between both the switches is broken, then standby sw…
Read more
