Cisco IOS and Cisco SB switches STP

[Tomas Chott]

Hello,

now i must redesign my ISP network for RING and TREE topology.

In core we have Cisco 3750s Stack with 6switches and for secondary we have Cisco SG500X switches, topology in attach.

And now we have problem with Spanning-Tree because both IOS and SB has different services

IOS has:

• mst         Multiple spanning tree mode
• pvst        Per-Vlan spanning tree mode
• rapid-pvst  Per-Vlan rapid spanning tree mode

SB has:

• stp                  Configure IEEE 802.1D Spanning Tree Protocol
• rstp                 Configure IEEE 802.1W Rapid Spanning Tree Protocol
• mst                  Configure IEEE 802.1S Multiple Spanning Tree Protocol

What is best-practise for configuration of STP between this models?

I preffered RSTP but IOS switches has only RSTP per VLAN

Regards,

Tomas

[DJX995]

I have a 3750X and an SG300 trunked together and they are both running RSTP.

I set my 3750X to rapid-pvst

I set my SG300 to rstp

A "show spanning" on both devices yields: "Spanning tree enabled protocol rstp".

Both seem to be communicating STP fine.

[Tomas Chott]

But probably all VLANs you must have in one instance ?

Tomas