12-14-2009 10:54 PM - edited 03-06-2019 08:57 AM
Can i disable STP on Catalyst 6509 & Catalyst 3750 globally ? If yes command ?
Can i disable STP on Catalyst 6509 & Catalyst 3750 per interface ? If yes command ?
12-14-2009 11:19 PM
Yes you can.
You can disable STP per VLAN with
switch(config)# no spanning-tree vlan vlan-id
Useful if you want to default ports to use portfast. Then you can have STP enabled for uplinks.
swithc(config)#spanning-tree portfast default
To disable spanning-tree per port you can use
switch(config-if)#spanning-tree portfast
Make sure your topology is free of loops when enabling this, as you'll create yourself a world of pain.
some links for more information.
Information of configuring STP
12-14-2009 11:29 PM
Dear satish,
Yes it is possible but before pl give me the details.
Regards.
Vaibhav.
12-14-2009 11:55 PM
Hello Satish,
even if it is possible, I strongly recommend to avoid this: STP is still useful even if the device is standalone to detect when a cable connects two ports of the same switch.
STP is there to prevent bridging loops, disabling STP does not mean that bridging loops can not occur even if someone calls them STP loops they are not caused by STP.
if there is a question of STP scalability (number of STP instances running on C3750 for example) you can minimize STP instances running on a device using
switchport trunk allowed vlan
VTP pruning does not provide STP instances minimization.
If the problem is interoperability with other vendors you can consider MST 802.1s.
if you are providing L2 services to a customer and you don't want to participate in customer's STP you can use
switchport bpufilter enable
in port mode
Hope to help
Giuseppe
12-15-2009 02:56 AM
"no spanning-tree vlan
Regards,
varun
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