For more details, please see ourCookie Policy.

Ethernet Switches & Routers

Occasional Visitor
Posts: 1
Registered: ‎06-12-2012

system-max spanning-tree 254

We have an urgent change request  to make it to night. we need to increase  the STP on a Brocade device  to 128.   I played with Cisco since 2009 ( my Team too)  but new to Brocades and I am very cautious as the devices are in Productions.



We need to increase the STP on BR1 and BR2  ( Failover is configured)  to 128

BR1- has 37 VLANS  and BR2 has  36 VLANs ( just ignore the extra VLAN at the moment !)


As BR1(config)# system-max spanning-tree 128  can affect the devices globally,  We need to hear  the technical opinions of the forum about the sort of  impact (if any ) we may run into ?  


of course  we are going to apply the command "at one Router at a time " and we have the back up too but the devices live in another country than the one we are in!!! ,  I believe it is worth asking it.









Former Brocadian
Posts: 238
Registered: ‎06-30-2010

Re: system-max spanning-tree 254



Just setting your system max value for spanning tree to 128 should have minimal effect on your switch, there should be plenty of resources to accommodate this.


It is also worth knowing that to change this value you need to write mem and reload.


There is some further information on displaying and modifying these values in the following links




If my response has solved your query please click the "Accept as Solution" button.

Any and all information provided by me is not reviewed, approved or endorsed by Brocade and is provided solely as a convenience for Brocade customers.

All systems and all networks are different and unique. If you have a service affecting network problem, please open a TAC service request for service through Brocade, or through your OEM equipment provider.

Join the Community

Get quick and easy access to valuable resource designed to help you manage your Brocade Network.