[j-nsp] Junos and single IPv6 link-local address per IFL

[Anderson, Charles R]

Link-Local addresses should be in fe80::/64, not fe80::/10.  Try configuring a second one that meets this criteria, such as:

> +       address fe80::206:aff:fe0e:fffb/64;

On Tue, Jan 22, 2019 at 03:42:43PM +0200, Martin T wrote:
> Hi,
> 
> looks like Junos allows to have only a single IPv6 link-local address.
> For example, here I tested with Junos 18.2R1.9:
> 
> root at vmx1# show | compare
> [edit interfaces ge-0/0/9 unit 0 family inet6]
>         address fe80::206:aff:fe0e:fffa/64 { ... }
> +       address fe80:1::206:aff:fe0e:fffa/64;
> 
> [edit]
> root at vmx1# commit check
> [edit interfaces ge-0/0/9 unit 0 family inet6]
>   'address fe80:1::206:aff:fe0e:fffa/64'
>      Link Local address exists
> error: configuration check-out failed
> 
> [edit]
> root at vmx1#
> 
> ..or:
> 
> root at vmx1# show | compare
> [edit interfaces ge-0/0/9 unit 0 family inet6]
>         address fe80::206:aff:fe0e:fffa/64 { ... }
> +       address fe80::206:aff:fe0e:fffb/64;
> 
> [edit]
> root at vmx1# commit check
> [edit interfaces ge-0/0/9 unit 0 family inet6]
>   'address fe80::206:aff:fe0e:fffb/64'
>      Link Local address exists
> error: configuration check-out failed
> 
> [edit]
> root at vmx1#
> 
> Just out of curiosity, why there is this limitation? For example
> FreeBSD 11, which Junos 18.2R1.9 is based on, does not have this
> limitation:
> 
> root at FreeBSD-11:~ # ifconfig em0 inet6
> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> 1500
>         options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
>         inet6 fe80::fc69:d3ff:feec:7741%em0 prefixlen 64 scopeid 0x1
>         inet6 fe80::fc69:d3ff:feec:7740%em0 prefixlen 64 scopeid 0x1
>         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> root at FreeBSD-11:~ #