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Forum Discussion
Tweaking STP on GS310TP
Hi,
I am using both GS310TP and GS308T for my home lab network. I have 2 hypervisors and shared storage that are connected to these switches configured as Adaptive Load Balancing. The 2 ports on each devices are connected to each of these switches (GS310TP and GS308T) and switches are connected via the main router/fw. Part of the workload I am doing is live migrating VMs from one hypervisor to another. This works perfectly fine and I do not see any degredation on the network.
However, I noticed that when I decided to bring down one hypervisor; the devices connected to those switches are getting disconnected for a few seconds (~45 seconds). I cannot pinpoint exactly what causes this but I can see some errors on the switch as below:
| Mar 09 2021 08:21:24: STP-6-PORT_STATE: Port GigabitEthernet8 moving from Learning to Forwarding |
| *Mar 09 2021 08:21:14: TRAPMGR-5-STP_TC: Bridge topology change. |
| *Mar 09 2021 08:21:09: STP-6-PORT_STATE: Port GigabitEthernet8 moving from Blocking to Learning |
| *Mar 09 2021 08:20:58: TRAPMGR-5-STP_NEW_ROOT: This bridge has changed to be the root bridge. |
| *Mar 09 2021 08:20:55: STP-6-PORT_STATE: Port GigabitEthernet8 moving from Forwarding to Blocking |
| *Mar 09 2021 08:20:55: STP-6-PORT_STATE: Port GigabitEthernet2 moving from Forwarding to Disabled |
| *Mar 09 2021 08:20:55: TRAPMGR-5-PORT_LINK_DOWN: Interface GigabitEthernet2 link down |
The G8 is my uplink while the G2 is the interface from my server connected to each of the switch. My STP parameters are as of below
STP Operation Mode: RTSP
Forward BPDU while STP DIsabled: Disable
Bridge Max Age: 20
Bridge Forward Delay: 15
Spanning Tree Max Hops: 20
Can someone help to suggest what I can tweak here so that I can eliminate or at least minimize the downtime? Thanks in advance
1 Reply
Something in the infrastructure (not the two switches configured to use RSTP) seems to do legacy STP in this case.
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