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How do I disable VLAN 1 on a Cisco switch?
The only way we can remove VLAN 1 is through the “switchport trunk allowed vlan remove 1″ command.
How do you protect a VLAN?
A few other recommended best practices in regard to VLAN security includes the following:
- Shutting down unused interfaces and placing them in a so-called “parking lot” VLAN.
- Restrict the VLANs allowed on trunk ports to only those that are necessary.
- Manually configure access ports with the switchport mode access.
Is VLAN 1 active?
The Access Port VLAN can change. You can set it to anything you like. The Default Native VLAN is always 1, this can not be change, because its set that way by Cisco. The Default VLAN is always 1, this can not be changed, because it is set that way by Cisco.
Can I shut down VLAN 1?
Usage Guidelines. You cannot shut down, or disable, VLAN 1 or VLANs 1006 to 4094. After you shut down a VLAN, the traffic ceases to flow on that VLAN. Access ports on that VLAN are also brought down; trunk ports continue to carry traffic for the other VLANs allowed on that port.
How do you keep a VLAN interface up?
The switch in question has a WAN connection through an interface in a different VLAN. This interface is up, but I cannot TELNET into the switch because VLAN1 is down. 08-03-2006 10:30 AM
How does inter VLAN bridging on Cisco work?
Refer to Cisco Technical Tips Conventions for more information on document conventions. Inter-VLAN bridging on a router that uses the same STP as the L2 switches results in a single STP instance for every VLAN that is a member of the same bridge. By default, all Catalyst switches and routers run the IEEE STP.
How to stop inter VLAN routing in Layer 3 switch?
Hi, I am working for a large campus network. The network has more than 70 VLANS in a Layer 3 Switch (Catalyst 4503). Customer wants to stop intervlan routing between all vlans except 2 vlans. How will i do that? I have also a Firewall (ASA 5520) & a Router (2811) in up of the switch.
Why is VLAN 2 not able to connect to switch 1?
As a result, the PC in VLAN 2 is not able to communicate to devices in VLAN 2 on the switch 1. This is the case because the port that goes to the switch is in the blocking state, and the MSFC does not bridge any L3 frames. In this diagram, the MSFC blocks on the VLAN 2 connection to switch 2.