We have below SNMP MIB browser , which supoorts both IPv6 and IPv4.
Some of these are licensed product , but free evaluation copy is available for limited time.
1) NuDesign :http://www.ndt-inc.com/SNMP/Download.html
2) WebNMS: http://www.webnms.com/snmputilities/mib-browser.html
3) ByteSphere : http://www.oidview.com/news_mib_browser_to_support_ipv6_with_snmp_traps.html
4) MG-Soft : http://www.mg-soft.si/mgMibBrowserPE-evaluate.html
5) Ireasoning :http://ireasoning.com/mibbrowser.shtml
