int f0/1 switchport access vlan 100 switchport mode access
Swithc will untagg all vlan 100 traffic as it goes out that inerface "UNTAGGED" traffic.
on router 2 ,you have your IP address on VLAN 100. Which means that if you want to access that IP address, the packets should enter the router as TAGGED VLAN100 traffic. which will not work because your switch UNTAGs them as it leavs the port.
When you configure your router with the NATIVE VLAN 100 command, we basically instruct the router to consider the UNTAGGED traffic comming in from that port as VLAN 100 traffic". Think of this as if the router is accutally tagging incoming UNTAGGED traffic as TAGGED VLAN 100 traffic as it enters this interface.. so this is why it works when you have the switch port access command on the switch
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...