From: Tom Lijnse (Tom.Lijnse@globalknowledge.nl)
Date: Tue Nov 23 2004 - 12:58:19 GMT-3
Funny enough the switch takes the command, though it doesn't really seem
to make any sense. At least it doesn't enable portfast for any of the
vlan 1 physical interfaces.
Considering that a VLAN interface is an internal software interface
inside the switch I don't really see what use it would be to have
spanning tree on it.
See the following output:
S5(config)#int vlan 1
S5(config-if)#spanning-tree portfast
%Warning: portfast should only be enabled on ports connected to a single
host. Connecting hubs, concentrators, switches, bridges, etc... to this
interface when portfast is enabled, can cause temporary bridging
loops.
Use with CAUTION
%Portfast has been configured on Vlan1 but will only
have effect when the interface is in a non-trunking mode.
S5(config-if)#^Z
S5#
04:25:29: %SYS-5-CONFIG_I: Configured from console by console
S5#sh spanning-tree int vlan 1
no spanning tree info available for Vlan1
S5#sh spanning-tree int fa 0/7 portfast
VLAN0001 disabled
S5#
Regards,
Tom Lijnse
CCIE #11031
Global Knowledge Netherlands
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tony Schaffran
Sent: dinsdag 23 november 2004 16:34
To: 'mani poopal'; ccielab@groupstudy.com
Subject: RE: port fast on a switch
Spanning-tree portfast should be configured on the physical port itself.
I have not tried to put it on the vlan interface. Is it even an option?
I
do not have access to a switch at the moment.
Tony Schaffran
Network Analyst
CCIE #11071
CCNP, CCNA, CCDA,
NNCDS, NNCSS, CNE, MCSE
www.cconlinelabs.com
Your #1 choice for online Cisco rack rentals.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
mani
poopal
Sent: Tuesday, November 23, 2004 7:15 AM
To: ccielab@groupstudy.com
Subject: port fast on a switch
Hi Group,
If the question ask to enable portfast on vlan 2 interfaces(fa 0/2 and
fa
/4) , the command spanning-tree portfast should be given on physical
interfaces or vlan 2 logical interface.
Mani
B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
(416)431 9929
MANI_CCIE@YAHOO.COM
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