E100 & E1000 Spanning tree and VLAN reuse

Question

I have a situations where I have two e series cards configured as single card ether-switches in the same chassis. One is an E100 and the other is an E1000. I have spanning tree enabled on all the transport circuit built to these cards. There is no STS connectivity between these cards.
I am reusing a few VLANs between the cards and the cards appear to be sharing spanning tree topology information. Has anyone had similar experiences reusing VLANs and discovered a work around for this? The 15454 documentation is not very descriptive of this situation and lacks detailed STP info as on would expect to be accessible from a Cisco switch.
Thanks,
Ken

Answer 1

I'm not so sure that singlecard/multicard mode has anything to do with STP on E-Series cards. From the book Optical Network Design and Implementation:
"It is important to remember that in the case of the E-Series cards, the Timing and Control 2 (TCC2) common card actually runs the spanning-tree engine with a single instance of STP per node. Each E-Series card plugged into the chassis maintains only a copy of its Layer 2 forwarding table. In the case of ML-Series cards, however, the individual cards maintain copies of the Layer 2 forwarding table and they run an instance of STP." ... "From an STP perspective, however, the entire ONS node is perceived as a single bridge, even though it might contain multiple E-Series cards. For ML-Series cards, however, each card is accounted for as a discrete bridge, and STP uses each and every ML-Series card for its STP computation."