DHCP snooping acts like a firewall between DHCP servers and un-trusted host/ports. It validates the DHCP messages received from un-trusted ports and filter out the invalid messages. Un-trusted ports are all host ports in a VLAN. which is configure for DHCP snooping. Trusted ports are ports connected to router, switch and server. DHCP snooping creates… Read More »
Source guard is a filtering feature that permits the traffic, only when source Ip address and source MAC address is matching in DHCP snooping binding table or when matching with the static source entry. below is the example of both nexus source guard and IOS IP verify unicast source It checks the every single packet… Read More »
Storm control is a feature of switching to control unnecessary or wrong traffic. which can cause of disruptions. This traffic can be broadcast traffic , multicast traffic or unicast traffic. Below is the example of Cisco Storm-Control Configuration. Generally, It should be configure on interfaces. where desktops and servers are connecting or It should be… Read More »
Booting Cisco Router From USB Flash We all know that cisco router and switch stores the IOS in flash. Flash is used like a hard drive. When we are booting the router, it loads the IOS file in to RAM from flash. Flash can be external or internal. It depends on hardware model. Sometime, Router… Read More »
Below is the BGP best path selection criteria : 1. If we are having only single route for destination then this route will be select without any condition. 2. Weight :- If we are having more than one routes for the same destination. Then a route with the highest weight value will be select. 3. … Read More »