SW1
D:D:D
SW2
E:E:E
SW3
C:C:C
Alice
VLAN10
10.10.10.10/24
00:50:79:66:68:1e
Bob
VLAN10
10.10.10.20/24
00:50:79:66:68:1f
Cost 10
Cost 10
Cost 5
DP
DP
RP
RP
DP
Blocking
gi0/1
508a.2e00.1c01
gi0/0
5054.4200.1b00
gi0/2
5054.4200.1b02
gi0/2
5078.4a00.1d02
gi0/2
508a.2e00.1c02
gi0/1
5078.4a00.1d01
gi0/0
gi0/0