Juniper EX IPv6 outside LAN isn't working

Question

JunOS version: 12.3R11.2

Juniper EX switch with 2 VLANs:
vlan 0: IPv4: 10.0.0.6/20
This vlan is used for private IP space

vlan 1: IPv4: X.X.X.254/24
IPv6: XXXX:XXXX:X:XXX::ffff/64
This vlan is used for public IP space

Devices connected to the switch can ping the gateway of my assigned IPv6 block (XXXX:XXXX:X:XXX::1), they can ping each other, and they can ping the XXXX:XXXX:X:XXX::ffff address assigned to the public vlan however they can't ping anything outside the LAN (ex. Google 2001:4860:4860::8888). IPv4 works fine.

There is a static route for 0.0.0.0/0 next-hop 10.0.0.1 but that is the only static route configured. Do I need to add a static route for ::/0 too? What would be the next-hop?

Any help is appreciated - I am learning this as I go.

EDIT: additional info

pings gateway okay
user@host:RE:0% ping6 xxxx:xxxx:x:xxx::1
PING6(56=40+8+8 bytes) xxxx:xxxx:x:xxx::ffff --> xxxx:xxxx:x:xxx::1
16 bytes from xxxx:xxxx:x:xxx::1, icmp_seq=0 hlim=64 time=6.213 ms
16 bytes from xxxx:xxxx:x:xxx::1, icmp_seq=1 hlim=64 time=6.516 ms
16 bytes from xxxx:xxxx:x:xxx::1, icmp_seq=2 hlim=64 time=1.684 ms
16 bytes from xxxx:xxxx:x:xxx::1, icmp_seq=3 hlim=64 time=1.720 ms

fails outside LAN
user@host:RE:0% ping6 2001:4860:4860::8888
PING6(56=40+8+8 bytes) xxxx:xxxx:x:xxx::ffff --> 2001:4860:4860::8888
ping6: sendmsg: No route to host
ping6: wrote 2001:4860:4860::8888 16 chars, ret=-1
ping6: sendmsg: No route to host
ping6: wrote 2001:4860:4860::8888 16 chars, ret=-1
ping6: sendmsg: No route to host
ping6: wrote 2001:4860:4860::8888 16 chars, ret=-1

Answer 1

IPv6, like IPv4, routing needs to have a route to the destination, even if it is only a default route, otherwise the traffic gets dropped by the router.

Routing works the same for any IP version: the router looks at the destination IP address, and it tries to find a match in its routing table. Absent such a match, the traffic is dropped.

You either need a default route from your ISP, or you need to manually configure a route to ::/0 with a next hop as your ISP's IPv6 interface.

Edit:

Normally, your ISP should assign you a /48 for your site, and you should set up IPv6 prefix delegation to assign your individual networks on your LAN. Some ISPs will only assign a /56, or, more rarely, a /60. The ISPs will not advertise any prefix longer than a /48, so that the addresses will belong to your ISP, but you can easily get a /48 from your RIR. If you get provider-independent addressing from your RIR, you may need to use BGP with your ISP, or negotiate for the ISP to advertise your IPv6 network.