https://community.extremenetworks.com/t5/extremeswitching-exos-switch/mstp-between-2-regions/m-p/46277#M11690 Hi,<BR /> <BR /> I have two sites in my network, each one with a different region of mstp, each one with domains that don't contain the same vlans.<BR /> <BR /> Now I want to connect both sites by a layer two connection and share some new vlans so I create a new mstp domain with these vlans in the switches of both sites.<BR /> <BR /> The problem is that the region id isn't the same so I suppose that the bpdu communication will be done by the cist domain of both sites.<BR /> <BR /> My question is if you need to add the vlans and port to the cist domain or the switches of each region automatically get it from all their msti domains. <BR /> <BR /> All my switches are BD8K with XEOS12.6<BR /> <BR /> Thanks for any answer.<BR /> <BR /> Thu, 29 May 2014 20:51:00 GMT Alvaro 2014-05-29T20:51:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/mstp-between-2-regions/m-p/46277#M11690 Hi,<BR /> <BR /> I have two sites in my network, each one with a different region of mstp, each one with domains that don't contain the same vlans.<BR /> <BR /> Now I want to connect both sites by a layer two connection and share some new vlans so I create a new mstp domain with these vlans in the switches of both sites.<BR /> <BR /> The problem is that the region id isn't the same so I suppose that the bpdu communication will be done by the cist domain of both sites.<BR /> <BR /> My question is if you need to add the vlans and port to the cist domain or the switches of each region automatically get it from all their msti domains. <BR /> <BR /> All my switches are BD8K with XEOS12.6<BR /> <BR /> Thanks for any answer.<BR /> <BR /> Thu, 29 May 2014 20:51:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/mstp-between-2-regions/m-p/46277#M11690 Alvaro 2014-05-29T20:51:00Z