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Topic review - How to configure Junos ipv6 default route
Author Message
Post subject: How to configure Junos ipv6 default route  |  Post Posted: Mon Feb 16, 2015 6:29 pm
IPv6 traffic is classified as “inet6” family in Junos routing operating system. The default routing table holding ipv6 routes is named inet6.0.

IPv4 default route is formed of four 0 octets with a zero mask: or 0/0 in Junos. In the same manner, rhe IPv6 default route expressed as sixteen 0 octets expressed by a zero subnet mask. But all sixteen bytes can be compressed into two consecutive colons - ::/0.

Check IPv6 prefixes/routes in Junos

admin@R1> show route table inet6.0

inet6.0: 13 destinations, 15 routes (13 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

                   *[Direct/0] 1w6d 03:54:29
                    > via lo0.0
                   *[Direct/0] 1w6d 03:54:29
                    > via lo0.0

Check if ipv6 default route exists

admin@R1> show route table inet6.0 ::/0 exact


Configure IPv6 default route

admin@R1> configure
Entering configuration mode

admin@R1# set routing-options rib inet6.0 static route ::/0 next-hop 2008:f234:ffff::e:0

admin@R1# commit
commit complete

admin@R1# run show route table inet6.0 ::/0 exact

inet6.0: 14 destinations, 16 routes (14 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

::/0               *[Static/5] 00:00:03
                    > to 2008:f234:ffff::e:0 via ge-0/0/4.0

Same as IPv4 routes, IPv6 have three minimum arguments: prefix, mask and next hop. One thing to note is that IPV6 routes have to be defined in “rib inet6.0” under “routing-options”.
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