TSB Deployment difficulties Dual stack. v4 and v6 in devices Tunnels: encapsulate v4 in v6 or v6 in v4 Conversion gateways Convert networks from the edges from the core by islands, either geographic or by application (3G) 1313 TSB Deployment difficulties • Dual stack: v4 and v6 in devices • Tunnels: encapsulate v4 in v6 or v6 in v4 • Conversion gateways • Convert networks – from the edges – from the core – by islands, either geographic or by application (3G)