Nov 20, 2006 · I got confused about Vlan1 and Native VLAN. VLAN1 is native VLAN by default, but they are different, so VLAN1 is not 100% equal native VLAN. According cisco srnd, vlan 1 should not be used for security purpose. I got a little confuse between Vlan 1 and native VLAN. a.VLAN 1 is the default native V...

the use of vlan 1 will not survive a security audit. as noted best practice is to shut down vlan 1, remove all ports from vlan 1 and use an alternative native vlan. the age old cunundrum is that with these practices, some control traffic will still pass across vlan 1; shocking but proven. however, due diligence demands following best practice ...

The default VLAN is always set to VLAN 1 and it is the VLAN that comes pre-configured on every switch (Cisco, HP, etc). The concept behind this is that the switch needs at least one VLAN to operate as a switch hence the reason for VLAN 1. It is also worth noting that all ports are configured to be part of VLAN 1 unless configured EXPLICITLY for another VLAN. The default VLAN CANNOT be changed.

May 7, 2019 · Hello guys, I am trying to understand why the Vlan 1 is so insecure. Any help would be appreciate it! Thanks in advance

An 'imaginary | software based | virtual switch' is now a part of 'Main Switch' We are going to call the newly created 'Vlan 10' - 'Switch 1', as pictured above, for the purpose of this document Accordingly 'Vlan 10' is the same as 'Switch 1'

Not using vlan 1 is recommended for security reasons. All ports are set to vlan 1 by default and vlan 1 is used by Control traffic (STP, DTP, CDP, etc). So, Management vlan - use to connect to devices by IT -should be something else; Yes, you could shutdown any Unused ports but usually they are moved to different vlan id that would not be use for data traffic (so called "park vlan"); it …

VLAN 1 is the most fundamental VLAN on a Cisco Catalyst Switch, so even if is not administratively allowed it's control traffic (note that i only mentioned control traffic) will be transfered to other switches. Older switches didn't let you remove VLAN 1 from the trunk allowed list, but nowadays you can, but nothing will happen from the control perspective.

Jan 6, 2013 · Cisco switches always have VLAN 1 as the default VLAN, which is needed for many protocol communication between switches like spanning-tree protocol for instance. You can't change or even delete the default VLAN, it is mandatory.

Jan 8, 2024 · we have a cisco server with vmware installed, hosting various entities like prime infrastructure, ISE in different vlans vlan 20 is used for vmware management, only one link is connected to server the configuration of the switch ports includes switchport trunk native vlan 20 switchport mode trunk vl...

Jun 21, 2018 · Consider this configuration on a Cisco 3560x switch running 15.0(2)SE11 interface GigabitEthernet0/1 description IDS connection to LAN switchport trunk encapsulation dot1q switchport trunk allowed vlan 11,12,66,68 switchport …