Comware

Hi can some one help with spanning-tree MST

How do you go about configuring the vlan to map to an instance and assgin it to ports to forward the instance on the switch??

Command:
spanning-tree instance <INSTANCE number=""> vlan <VLANID>

"Configuring MSTP on the switch automatically configures the IST instance and places all statically configured VLANs on the switch into the IST instance.
This command creates a new MST instance (MSTI) and moves the VLANs you specify from the IST to the MSTI. At least one VLAN must be mapped to a MSTI when you create it.
(A VLAN cannot be mapped to more than one instance at a time.)"

Reference: "chapter 6, pages 6-45 onwards
@ftp://ftp.hp.com/pub/networking/software/6400-5300-4200-3400-AdvTrafficMgmt-Oct2006-59906051.pdf"

Hope that helps</VLANID></INSTANCE>

are you trying to uilise different paths for different vlans? use all uplinks?

if so, you need to configure you're instances + creating a named instance for that config adn then priorities on your core device(s) for those instances.

example: Edge switch,

span config-name CONF-MSTP
span instance 1 vlan 2-3
span instance 2 vlan 4

Example Core Switch A:

spanning-tree config-name "CONF-MSTP"
spanning-tree instance 1 vlan 2 3
spanning-tree instance 1 priority 1
spanning-tree instance 2 vlan 4
spanning-tree instance 2 priority 0

Example Core Switch B:

spanning-tree config-name "CONF-MSTP"
spanning-tree instance 1 vlan 2 3
spanning-tree instance 1 priority 0
spanning-tree instance 2 vlan 4
spanning-tree instance 2 priority 1

hope that helps.

Trev.

Thanks guys for the help

I have got a 5308xl switch, which has a HP J4907A XL Gig-T/GBIC module. There are two uplinks to another site, B15 and B16. How do you send the MST instance down the one interface after you configure the parameters for MST