make all access ports or vlan a certain config

[robertkwild]

hi all,

i want to make all access ports or ports on a certain vlan all port fast, i know the normal way of doing it per port(s)

conf

int range 1/0/1-24 or just 1/0/25,1/0/27

spanning-tree portfast

but can i do this for a vlan instead of ports, shall i do this for the trunk ie PO aswell?

thanks,

rob

[acampbell]

Hi

You really only want to be running port fast on switch access ports.
port fast is a directed spanning tree state, it make the port go immediately in to "forwarding mode"
but this means it is not going through normal states like listening & learning.
Access ports usually mean we are cooneting directlly to an end user device like a PC or printer etc.

You should be far more wary of putting trunks straight to "forwarding mode" and it is most likely that te IOS will stop that. on a trunk.
You need to be avioding any chance of spanning tree loops

You can use the command "switchprt host" on the port to end user devices.
This command has 3 affects when implemented
1)Ensures the port is in "access mode"
2)Enables spanning tree "port fast"
3) Disables port channeling on the port.

Example config

!
interface range gig1/0/1 - 22
switchport host
switchport access vlan 100
description PC ONLY PORTS
!

Here are a couple of links to give you more pointers:-
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/5234-5.html?dtid=osscdc000283
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/command/ir-cr-book/ir-s7.html?dtid=osscdc000283#wp1088640682

search for fast & host within these.

Hope this helps.

[paul driver]

Hello
you could utilise a port macro

Example:
macro name set-access_ports
description access ports
switchport host
no logging event link-status
switchport access vlan x
switchport voice vlan xx
switchport nonegotiate
no shut

macro name trunk_ports
description trunk ports
switchport trunk allowed vlan x,x,x
switchport mode trunk
switchport nonegotiate
spanning-tree link-type point-to-point
no shut

interface range x/x-x
macro apply <marco name>

[Joseph W. Doherty]

Per VLAN?  Not that I'm aware of.

However, you can make portfast the default for all access ports (global configuration command spanning-tree portfast default), and change individual port (or port ranges) to disable it.  (Not exactly what you want, but might be less work.)

Regarding setting a trunk port to portfast, that might be done for something like a VM host using multiple VLANs, but even then, you probably don't need it.