Here is a topology I put together for an excellent IPV6 lab. (Here is a sample of what I’ve been putting together, hope to get more content uploaded soon.)
IPV6 Lab from – IPV6 Lab – IPV6 Addressing Setup
Equipment –
(10) 7200 Routers running IOS [c7200-adventerprisek9-mz.152-4.S4]
(3) 3640 Routers running IOS [c3640-jk9s-mz.124-16]
(6) Plain Vanilla Ethernet Switches
7200 Buildout –

3640 Buildout –

Screenshot –

GNS3 Topology Files DROP BOX LINK
Click on the download link at the top right of the page and select ‘download as .zip’.
Extract and run. Make sure to adjust the Idle-PC values for all routers. (FYI – The MultiLayer Switches and Servers are actually routers, just with different icons.)