I also use command line and spicy to connect to the console.

To set up a network bridge (all commands assume that the user executing qemu belongs to group kvm and VMs' IP numbers start with 192.168.128.2):

• set up qemu-bridge-helper (has to be done once after upgrade):

  chgrp kvm /usr/lib/qemu/qemu-bridge-helper
  chmod 554 /usr/lib/qemu/qemu-bridge-helper
  setcap CAP_NET_ADMIN,CAP_NET_RAW,CAP_NET_BIND_SERVICE=ep /usr/lib/qemu/qemu-bridge-helper

• enable bridge at boot:

  echo 1 > /proc/sys/net/ipv4/ip_forward
  ip link add name brvm type bridge
  ip addr add 192.168.128.1/24 dev brvm
  ip link set up brvm
  iptables -t nat -A POSTROUTING -s 192.168.128.0/24 -o eth+ -j MASQUERADE
  iptables -t nat -A POSTROUTING -s 192.168.128.0/24 -o wlan+ -j MASQUERADE

• pass this parameter when launching qemu:
  -netdev tap,id=eth,br=brvm,helper=/usr/lib/qemu/qemu-bridge-helper

It is also possible to attach dhcpd and/or radvd to brvm for automatic address space management. By changing those ip commands above you may bridge brvm with workstation's ethernet interface and allow attaching VMs directly to the LAN.