02-27-2025 11:18 PM
Hello,
I try to replace some old Catalyst switches with new 1300 Series.
During migrating the configuration, I found some things which I cant set on the new system:
no service pad
spanning-tree extend system-id
vlan internal allocation policy ascending
Maybe someone could help me with this.
Thx in advance,
Thomas
Solved! Go to Solution.
02-28-2025 01:27 AM - edited 02-28-2025 01:27 AM
I don't think the command spanning-tree extends-system-id can be disabled on modern Cisco switches.
This command automaticaly appends the vlan id to the bridge priority, marking the real priority:
[priority == configured prio + vlan id]
And if you running PVST, this behavior is enable by default and cannot be turned off. I think C1300 follow this beahvior udner PVST!
02-27-2025 11:30 PM
- Note that these small to medium oriented business , oriented switches do not run IOS
and or not offering all related services,
M.
02-28-2025 12:24 AM
I thought about the three things again:
I can deal with "vlan internal allocation policy ascending" reserve some vlan >1006 for internal usage, right?
sh vlan internal usage showing me some vlan above 4093. Thats fine so far, if this range is fixed.
If "no service pad" affects only X.25 - so I didn't need this feature and I may as well forget about it.
The biggest problem is the behavior for "spanning-tree extends-system-id" .
I can't find an equivalent for this command and I don't know how the 1300 series behaves here by default.
We use "spanning-tree mode pvst" on this switch.
Maybe someone has an idea specifically for the spanning tree problem.
02-28-2025 01:27 AM - edited 02-28-2025 01:27 AM
I don't think the command spanning-tree extends-system-id can be disabled on modern Cisco switches.
This command automaticaly appends the vlan id to the bridge priority, marking the real priority:
[priority == configured prio + vlan id]
And if you running PVST, this behavior is enable by default and cannot be turned off. I think C1300 follow this beahvior udner PVST!
02-28-2025 03:18 AM
I dont want dissable, I want it enable, so if you said thats enabled by default, everything is perfect.
02-27-2025 11:32 PM - edited 02-27-2025 11:32 PM
Hello @FooBar78
So you have checked here ?
02-28-2025 12:07 AM
yes, I still worked with the CLI Guide. I was able to solve the most of my problems with this.
But I couldn't found a solution for the remainig three from my 1st post, thats why I start this conversation.
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