excuse me, this is my first post.skip to ------fast question------ for a quick question, read on for long explanation
I have an existing (other-vendor) network with spanning tree running and multiple vlans, so I place new juniper switches ex4200 and make a new rstp domain.
This existing network has a spanning tree running, and I would like my to keep it running (no-downtime) if one of my switches reboots.
I want to make some of the vlans in the existing network available on my switches without the spanning tree hassle so I create access-ports in the existing network and access ports in the juniper and connect themper vlan.
If I was to make a BPDU guard, my accessport would be disabled every time a BPDU came through. and connectivity to the streched vlan would be interrupted.
So I choose "protocol rstp interface ge-x/x/x disable" but this does not prevent BPDU coming into my RSTP domain.
So now my new RSTP domain thinks the root-bridge is in the existing network (because of priorities)
OS version 9.5R2.7 by the way
I am hoping for an answer that includes an ethernet firewall rule type filter.
Is it possible on a juniper ex 4200 switch to make a filter to prevent BPDU from entering on a access-port without disabling the port completely? if so, how?