de ce nu pot adauga in tabela de rutare acea intrare pentru ca eu am avut o si am sters o de ce nu ma lasa sa o adaug iar? student@Roma:~$ ip -6 r s
2024:baba:71:79:4::/96 dev to-host metric 1024 pref medium
2024:baba:71:79:5::/96 dev sw0.5 proto kernel metric 256 pref medium
2024:baba:71:79:5::/96 via fdee:dada:164:40::1 dev to-host metric 1024 pref medium
fdee:dada:164:40::/96 via fdee:dada:164:40::1 dev to-host metric 1024 pref medium
fdee:dada:164:40::/64 dev to-host proto kernel metric 256 pref medium
fdee:dada:164:40::/64 dev to-host metric 1024 pref medium
fe80::/64 dev sw0 proto kernel metric 256 pref medium
fe80::/64 dev sw0.4 proto kernel metric 256 pref medium
fe80::/64 dev sw0.5 proto kernel metric 256 pref medium
student@Roma:~$ sudo ip -6 route add 2024:baba:71:79:4::/96 via fdee:dada:164:40::1 dev to-host
RTNETLINK answers: No route to host
student@Roma:~$ sudo ip -6 route del 2024:baba:71:79:4::/96
student@Roma:~$ sudo ip -6 route add 2024:baba:71:79:4::/96 via fdee:dada:164:40::1 dev to-host
RTNETLINK answers: No route to host
student@Roma:~$ sudo ip -6 route add 2024:baba:71:79:4::/96 via fdee:dada:164:40::1 dev to-host proto kernel metric 256
RTNETLINK answers: No route to host
student@Roma:~$ sudo ip -6 route add 2024:baba:71:79:4::/96 via fdee:dada:164:40::1 dev to-host metric 1024 pref medium
RTNETLINK answers: No route to host
student@Roma:~$ ip -a s
Usage: ip sr { COMMAND | help }
          ip sr hmac show
          ip sr hmac set KEYID ALGO
          ip sr tunsrc show
          ip sr tunsrc set ADDRESS
where  ALGO := { sha1 | sha256 }
student@Roma:~$ ip -6 a s
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: sw0.4@sw0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 state UP qlen 1000
    inet6 2024:baba:71:79:4::1/96 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::b035:94ff:feea:33b5/64 scope link
       valid_lft forever preferred_lft forever
3: to-host@sw0.5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 state UP qlen 1000
    inet6 fdee:dada:164:40::2/64 scope global
       valid_lft forever preferred_lft forever
4: sw0.5@sw0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 state UP qlen 1000
    inet6 2024:baba:71:79:5::1/96 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::b035:94ff:feea:33b5/64 scope link
       valid_lft forever preferred_lft forever
8: sw0@if7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 state UP qlen 1000
    inet6 fe80::b035:94ff:feea:33b5/64 scope link
       valid_lft forever preferred_lft forever
student@Roma:~$ sudo ip -6 route add 2024:baba:71:79:4::/96 via fdee:dada:164:40::1 dev to-host metric 1024 pref medium
RTNETLINK answers: No route to host
student@Roma:~$ ping6 fdee:dada:164:40::1
PING fdee:dada:164:40::1(fdee:dada:164:40::1) 56 data bytes
64 bytes from fdee:dada:164:40::1: icmp_seq=1 ttl=64 time=0.087 ms
64 bytes from fdee:dada:164:40::1: icmp_seq=2 ttl=64 time=0.067 ms
64 bytes from fdee:dada:164:40::1: icmp_seq=3 ttl=64 time=0.068 ms
^C
--- fdee:dada:164:40::1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2055ms
rtt min/avg/max/mdev = 0.067/0.074/0.087/0.009 ms
student@Roma:~$