When you define a VLAN ( int vlan x ) you need to be sure and define it in the VLAN DATABASE. 3550 and 3560 are Layer 3 capable switchesplus a whole lot more. Be sure to check and see if the VLAN is Up or Down. If the VLAN is down you haven't defin...
RSTP-capable switches are fully interoperable with 802.1D switches. They simply fall back to 802.1D on a per-port basis when connected to older switches. 802.1D switches ignore 802.1w BPDUs because of their type value. Because of this interoperabilit...
