Help generate macvlan & support programs. Two default gateways on one NIC with 2 Internet routers

add_mac_vlan.sh

#!/bin/sh
ip link add link p36p1 mac1  address 56:61:4f:7c:77:db type macvlan
# next line adds default route via the router connected to the cable modem
ip route add default via 192.168.151.65 dev mac1 table mac1tbl # refers to /etc/iproute2/rt_tables entry
ip rule add from 192.168.151.65/32 table mac1tbl
ip rule add to 192.168.151.65/32 table mac1tbl

genUUIDmac.py

#!/usr/bin/python 
#  -*- mode: python; -*-
print ""
print "New UUID:"
import virtinst.util ; print virtinst.util.uuidToString(virtinst.util.randomUUID())
print "New MAC:"
import virtinst.util ; print virtinst.util.randomMAC()
print ""

ifcfg-mac1 file

#UUID="d735249a-1305-4a53-a462-4e1319becaef"
NM_CONTROLLED="yes"
HWADDR="56:61:4f:7c:77:db"
BOOTPROTO="dhcp"
DEVICE="mac1"
ONBOOT="no"

macgen.py

#!/usr/bin/python
# macgen.py script to generate a MAC address for guests on Xen
# 
import random
#
def randomMAC():
	mac = [ 0x00, 0x16, 0x3e,
		random.randint(0x00, 0x7f),
		random.randint(0x00, 0xff),
		random.randint(0x00, 0xff) ]
	return ':'.join(map(lambda x: "%02x" % x, mac))
#
print randomMAC()