"Spanning-tree port-priority" command missing

Using Packet Tracer 7.

I am starting to practice with STP.

I noticed when configuring an interface that this command is missing. Is this just a limitation of PT or am I missing something. I was using the 2960 switch but I also looked at the others to with same findings.

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MitM

you want to do "spanning-tree vlan <vlan #> port-priority"

wseyller

MitM wrote: »

you want to do "spanning-tree vlan <vlan #> port-priority"

thanks. The video instructor didn't use "vlan" as i assume his equipment was different. I got it now. I can see it change only for vlan 1 for example but did not change for other vlans.

wseyller

Ok I have one more question on STP commands

To change the cost of an interface such as: spanning-tree cost 18
that is missing also from packet tracer.

I tried: spanning-tree vlan # cost 18

but the help doesn't show on cost command that I can find.

rob42

wseyller wrote: »

Ok I have one more question on STP commands

To change the cost of an interface such as: spanning-tree cost 18
that is missing also from packet tracer.

I tried: spanning-tree vlan # cost 18

but the help doesn't show on cost command that I can find.

You need to be in the config-if mode...

S2950_1(config-if)#spanning-tree ?
cost Change an interface's spanning tree port path cost
guard Change an interface's spanning tree guard mode
port-priority Change an interface's spanning tree port priority
portfast Enable an interface to move directly to forwarding on link up
stack-port Enable stack port
vlan VLAN Switch Spanning Tree

... but I don't think that the CPT IOS supports this feature. One of my 2950 switches is running IOS Ver 12.1(6), which is where the command help came from. My other 2950 is running IOS Ver 12.0(5.3) and shows this at the command help...

S2950_2(config-if)#spanning-tree ?
cost Change an interface's spanning tree path cost
port-priority Change an interface's spanning tree priority
portfast Allow a change from blocking to forwarding
rootguard Enforce root guard
vlan VLAN Switch Spanning Trees

wseyller

I think it is just packet tracer. I pasted some text from packet tracer. I also finally got some switches in GNS3 which I also pasted text from that. The GNS3 option has more commands available.

PACKET TRACER (SPANNING-TREE)
Switch(config)#int f0/1
Switch(config-if)#spann
Switch(config-if)#spanning-tree ?
bpduguard Don't accept BPDUs on this interface
guard Change an interface's spanning tree guard mode
link-type Specify a link type for spanning tree protocol use
portfast Enable an interface to move directly to forwarding on link up
vlan VLAN Switch Spanning Tree
Switch(config-if)#spanning-tree

PACKET TRACER (SPANNING-TREE VLAN 1)
Switch(config)#int f0/1
Switch(config-if)#span
Switch(config-if)#spanning-tree vla
Switch(config-if)#spanning-tree vlan ?
WORD vlan range, example: 1,3-5,7,9-11
Switch(config-if)#spanning-tree vlan 1 ?
port-priority Change an interface's spanning tree port priority
Switch(config-if)#spanning-tree vlan 1

GNS3 (SPANNING-TREE)
S2(config-if)#spanning-tree ?
bpdufilter Don't send or receive BPDUs on this interface
bpduguard Don't accept BPDUs on this interface
cost Change an interface's spanning tree port path cost
guard Change an interface's spanning tree guard mode
link-type Specify a link type for spanning tree protocol use
mst Multiple spanning tree
port-priority Change an interface's spanning tree port priority
portfast Enable an interface to move directly to forwarding on link up
vlan VLAN Switch Spanning Tree

S2(config-if)#spanning-tree S2(config)#int e0/0

GNS3 (SPANNING-TREE VLAN 1)
S2(config)#int e0/0
S2(config-if)#spann
S2(config-if)#spanning-tree vlan 1 ?
cost Change an interface's per VLAN spanning tree path cost
port-priority Change an interface's spanning tree port priority

S2(config-if)#spanning-tree vlan 1