  from seedemu import Emulator

# Create the emulator
emulator = Emulator()

# Create the base layer
base = emulator.add_layer("base")

# Create multiple autonomous systems
as1 = base.add_autonomous_system("as1")
as2 = base.add_autonomous_system("as2")
as3 = base.add_autonomous_system("as3")

# Create internet exchanges
ix1 = base.add_internet_exchange("ix1")
ix2 = base.add_internet_exchange("ix2")

# Create hosts and routers
host1 = as1.add_host("host1")
host2 = as1.add_host("host2")
router1 = as1.add_router("router1")
router2 = as2.add_router("router2")

# Join the hosts and routers to the network and internet exchanges
host1.join_network(as1.network)
host2.join_network(as1.network)
router1.join_network(as1.network)
router2.join_network(as2.network)

host1.join_internet_exchange(ix1)
host2.join_internet_exchange(ix1)
router1.join_internet_exchange(ix1)
router2.join_internet_exchange(ix2)

# Create the routing layer
routing = emulator.add_layer("routing")

# Add private peerings between autonomous systems
as1.add_private_peering(as2)
as2.add_private_peering(as1)

# Create the eBGP layer
ebgp = emulator.add_layer("ebgp")

# Add eBGP peers between autonomous systems
as1.add_ebgp_peer(as2)
as2.add_ebgp_peer(as1)

# Create the domain name caching service
dns = emulator.add_layer("dns")

# Install the domain name caching service on specific hosts
host1.install_service(dns)
host2.install_service(dns)

# Add bindings for the domain name caching service
host1.add_binding(dns, "host1.example.com")
host2.add_binding(dns, "host2.example.com")

# Dump the state of the emulator to a binary file
emulator.dump_state("emulator.bin")

# Start the emulator
emulator.start()