On the Juniper EX4300:
admin@EX4300# set interfaces ge-0/0/24 description “v2001 to Spirent”
admin@EX4300# set interfaces ge-0/0/24.0 family ethernet-switching vlan
members v2001
admin@EX4300# set interfaces ge-0/0/25 description “v2002 to Spirent”
admin@EX4300# set interfaces ge-0/0/25.0 family ethernet-switching vlan
members v2002
3. Configure trunk ports that allow tagged traffic from VLANs v2001 and v2002.
On the Juniper Virtual Chassis Fabric:
admin@VCF# set interfaces xe-1/0/2 description “RSTP to Nexus 7010 e3/3”
admin@VCF# set interfaces xe-1/0/2 unit 0 family ethernet-switching
interface-mode trunk
admin@VCF# set interfaces xe-1/0/2 unit 0 family ethernet-switching vlan
members v2001
admin@VCF# set interfaces xe-1/0/2 unit 0 family ethernet-switching vlan
members v2002
admin@VCF# set interfaces ge-0/0/12 description “RSTP to Juniper EX4300 ge-
0/0/12”
admin@VCF# set interfaces ge-0/0/12 unit 0 family ethernet-switching
interface-mode trunk
admin@VCF# set interfaces ge-0/0/12 unit 0 family ethernet-switching vlan
members v2001
admin@VCF# set interfaces ge-0/0/12 unit 0 family ethernet-switching vlan
v2002
On the Juniper EX4300:
admin@EX4300# set interfaces xe-0/2/0 description “RSTP to Nexus 7010 e3/1”
admin@EX4300# set interfaces xe-0/2/0 unit 0 family ethernet-switching
interface-mode trunk
admin@EX4300# set interfaces xe-0/2/0 unit 0 family ethernet-switching vlan
members v2001
admin@EX4300# set interfaces xe-0/2/0 unit 0 family ethernet-switching vlan
members v2002
admin@EX4300# set interfaces ge-0/0/12 description “RSTP to Juniper EX4300
ge-0/0/12”
admin@EX4300# set interfaces ge-0/0/12 unit 0 family ethernet-switching
interface-mode trunk
admin@EX4300# set interfaces ge-0/0/12 unit 0 family ethernet-switching
vlan members v2001
admin@EX4300# set interfaces ge-0/0/12 unit 0 family ethernet-switching
vlan members v2002
4. Enable multiple spanning tree. This requires deleting rapid spanning tree (if enabled)
and then setting one multiple spanning tree instance (MSTI) per VLAN.
On the Juniper Virtual Chassis Fabric:
admin@VCF# delete protocols rstp
admin@VCF# set protocols mstp interface xe-1/0/2
admin@VCF# set protocols mstp interface ge-0/0/12
admin@VCF# set protocols mstp msti vlan v2001
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