# In this example, the network topology looks like below:
#
# User_0 --100Mbps-- r1 ----|
# User_1 --100Mbps-- r2 --100Mbps-- r4 --1Gbps-- r5 --100Mbps-- GridResource(s)
# User_2 --100Mbps-- r3 ----|
        
# total number of Routers
5

# specifies each router name and whether to log its activities or not
# by default no logging is required
R1 true  # logs this router
R2       # does not need to log this router
R3
R4
R5
                
# specify the link between two routers
# The format is:
# router_name1  router_name2    baud_rate(GB/s)     prop_delay(ms)  mtu(byte)
R1  R4  0.10    10.0    1500
R2  R4  0.10    10.0    1500
R3  R4  0.10    10.0    1500
R5  R4  1.00    10.0    1500