Hi Everyone
I haave a problem with CATOS, something which ive never used and was wondering if you give me a hand. Basically I need to change the spanning tree from rapid-pvst+ to an open standard as i will be connecting some H3c switches. The problem is when i look at my spanning tree options in CATOS i only get:
pvst+ Run Per VLAN Spanning Tree
mistp Run Per Instance Spanning Tree
mistp-pvst+ Run MISTP but allow remote PVST+/RAPID-PVST+
mst Run IEEE MST (802.1s-based)
rapid-pvst+ Run Per VLAN Rapid Spanning Tree (802.1w)
The H3c switch supports:
IEEE 802.1D (STP)
IEEE 802.1w (RSTP)
IEEE 802.1s (MSTP)
Now what i was wondering is. will RSTP 802.1w on the H3c switch work with rapid-pvst+ on the cisco switch? I thought rapid pvst+ was cisco properietary but next to the description it clearly states 802.1w. I want to use rapid spanning tree instead of mstp.
If i have no choice but to change the spanning tree to mstp on the cisco switch then ill need to make the changes without making the spanning tree go haywire. Basically I have 2 cores. Core 1 which is the root bridge and core 2 has spanning tree disabled for the relevent vlans. There are a few switches connecting to both cores in a loop. what the best practice when changing the spanning tree to mstp? Just a bit nervous as i dont want to bring everything down. (IOS would have been soo much easier).
I was thinking about first increasing the bridge priority on core 2 to something like 32768 and then changing it to mstp and then changing the the mstp on core 1 last. Would that work without a hitch?
Here is some of the config for both the cores:
core 1:
#stp mode
set spantree mode rapid-pvst
#vlan <VlanId>
set spantree priority 12 1
set spantree priority 8192 10
set spantree priority 8192 20
set spantree priority 8192 30
set spantree priority 8192 40
set spantree priority 8192 50
core 2:
#stp mode
set spantree mode rapid-pvst
set spantree disable 30
set spantree priority 8191 30
set spantree disable 40
set spantree priority 8191 40
set spantree disable 50
set spantree priority 8191 50
set spantree disable 60
set spantree priority 8191 60
I know its a long one but I really appreciate your help with this one.
Thanks