Comcast Dual-Stack on Netscreen 5GT (firmware: 6.2.0r16.0)

[ckloiber]

I confirmed I get IPv6 plugging Windows 7 Enterprise into the cable modem directly.

I can't get the Netscreen configured after several days of searching however. I can't find a concise HOWTO anywhere. Even attempting the config provided for a Tunnelbroker tunnel only worked by IP and never gave me working DNS servers via DHCPDv6. Here is my latest (not working) config. Ideally I would like to access the internal systems via IPv6 without IPv4 port forwarding. Can anyone tell me what I am not doing correctly?

unset key protection enable
set clock timezone -5
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
set alg appleichat enable
unset alg appleichat re-assembly enable
set alg sctp enable
set auth-server "Local" id 0
set auth-server "Local" server-name "Local"
set auth default auth server "Local"
set auth radius accounting port 1646
set admin name "netscreen"
set admin password "XXXXXXX-Yes-it-was-changed-XXXXXXX"
set admin http redirect
set admin auth web timeout 10
set admin auth server "Local"
set admin format dos
set zone "Trust" vrouter "trust-vr"
set zone "Untrust" vrouter "trust-vr"
set zone "VLAN" vrouter "trust-vr"
set zone "Untrust-Tun" vrouter "trust-vr"
set zone "Trust" tcp-rst
set zone "Untrust" block
unset zone "Untrust" tcp-rst
set zone "MGT" block
unset zone "V1-Trust" tcp-rst
unset zone "V1-Untrust" tcp-rst
unset zone "VLAN" tcp-rst
set zone "Untrust" screen tear-drop
set zone "Untrust" screen syn-flood
set zone "Untrust" screen ping-death
set zone "Untrust" screen ip-filter-src
set zone "Untrust" screen land
set zone "V1-Untrust" screen tear-drop
set zone "V1-Untrust" screen syn-flood
set zone "V1-Untrust" screen ping-death
set zone "V1-Untrust" screen ip-filter-src
set zone "V1-Untrust" screen land
set interface "trust" zone "Trust"
set interface "untrust" zone "Untrust"
unset interface vlan1 ip
set interface trust ip 192.168.1.1/24
set interface trust nat
set interface untrust ip 76.111.41.5/21
set interface "untrust" ipv6 mode "host"
set interface "untrust" ipv6 enable
set interface untrust nat
set interface untrust mtu 1500
set interface "untrust" pmtu ipv4
set interface untrust proxy dns
unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
unset interface vlan1 bypass-ipv6-others-ipsec
set interface vlan1 bypass-icmpv6-ndp
set interface vlan1 bypass-icmpv6-mld
unset interface vlan1 bypass-icmpv6-mrd
unset interface vlan1 bypass-icmpv6-msp
set interface vlan1 bypass-icmpv6-snd
set interface trust ip manageable
set interface untrust ip manageable
set interface trust manage mtrace
set interface untrust manage ping
set interface untrust manage ssh
set interface untrust manage ssl
set interface untrust manage web
set interface untrust manage ident-reset
set interface untrust vip interface-ip
set interface untrust ipv6 ra accept
set interface untrust ipv6 nd nud
set interface untrust dhcp6 client
set interface untrust dhcp6 client options rapid-commit
set interface untrust dhcp6 client options request dns
set interface untrust dhcp6 client options request search-list
set interface untrust dhcp6 client options request pd
set interface untrust dhcp6 client enable
set interface untrust dhcp client enable
set interface trust dhcp server service
set interface trust dhcp server auto
set interface trust dhcp server option domainname hsd1.ga.comcast.net.
set interface trust dhcp server ip 192.168.1.151 to 192.168.1.199
set interface trust dhcp server ip 192.168.1.100 mac 6cf06cf0eb79
unset interface trust dhcp server config next-server-ip
set interface untrust ntp-server
set flow tcp-mss
unset flow tcp-syn-check
unset flow tcp-syn-bit-check
set flow reverse-route clear-text prefer
set flow reverse-route tunnel always
set domain hsd1.ga.comcast.net.
set dbuf usb filesize 0
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set crypto-policy
exit
set ike respond-bad-spi 1
set ike ikev2 ike-sa-soft-lifetime 60
unset ike ikeid-enumeration
unset ike dos-protection
unset ipsec access-session enable
set ipsec access-session maximum 5000
set ipsec access-session upper-threshold 0
set ipsec access-session lower-threshold 0
set ipsec access-session dead-p2-sa-timeout 0
unset ipsec access-session log-error
unset ipsec access-session info-exch-connected
unset ipsec access-session use-error-log
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
set url protocol websense
exit
set policy id 1 from "Trust" to "Untrust"  "Any-IPv4" "Any-IPv4" "ANY" permit
set policy id 1
exit
set policy id 2 from "Untrust" to "Trust"  "Any-IPv4" "Any-IPv4" "ANY" permit
set policy id 2
exit
set policy id 3 from "Untrust" to "Trust"  "Any-IPv6" "Any-IPv6" "ANY" permit
set policy id 3
exit
set policy id 4 from "Trust" to "Untrust"  "Any-IPv6" "Any-IPv6" "ANY" permit
set policy id 4
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set ssh enable
set scp enable
set config lock timeout 5
unset license-key auto-update
set telnet client enable
set ntp server "0.us.pool.ntp.org"
set ntp server backup1 "1.us.pool.ntp.org"
set ntp server backup2 "2.us.pool.ntp.org"
set ntp interval 300
set ntp "no-ha-sync"
set ntp max-adjustment 300
set modem speed 115200
set modem retry 3
set modem interval 10
set modem idle-time 10
set snmp port listen 161
set snmp port trap 162
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit


I'm guessing I somehow need to use a DHCPv6 client on the Untrust interface, and a DHCPv6 server on the Trust interface, but nothing has worked yet.

Please help. Thanks!