Just wondering if someone could clear up a spanning tree question we have.
Say you have the following Layer 2 network, we will assume only a single VLAN is used throughout...
`Switch1——-Switch2 | | Switch3——-Switch4`
Assuming all switches are managed (say Cisco), if you only enable Spanning Tree on Switch 1 (Root Bridge) and Switch 2 but not on Switch 3 and Switch 4, do the BPDU’s just “passthrough” Switch 3 and Switch 4 without being processed, or is disabling spanning tree similar to a Deny ACL for BPDU’s?
If the BPDU’s are just passed through, is it safe to assume that Switch1/2 will detect the loop and shut down the uplink to either Switch 3 or Switch 4?
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