Ubuntu IPv6 ping self gives unknown host
up vote
3
down vote
favorite
I'm stuck trying to get IPv6 working on a new Ubuntu 16.04 (Xenial Xerus) install. My scenario is very basic - trying to ping the local IPv6 address.
$ ifconfig
enp0s25 Link encap:Ethernet HWaddr b8:ae:ed:77:91:fa
inet6 addr: fe80::ba94:3d5e:9929:4c6e/64 Scope:Link
and
$ ping6 -c 5 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
results in
unknown host
How do I troubleshoot?
ubuntu ipv6 localhost
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
asked Nov 17 at 18:50
jws
1956
add a comment |
up vote
3
down vote
favorite
I'm stuck trying to get IPv6 working on a new Ubuntu 16.04 (Xenial Xerus) install. My scenario is very basic - trying to ping the local IPv6 address.
$ ifconfig
enp0s25 Link encap:Ethernet HWaddr b8:ae:ed:77:91:fa
inet6 addr: fe80::ba94:3d5e:9929:4c6e/64 Scope:Link
and
$ ping6 -c 5 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
results in
unknown host
How do I troubleshoot?
ubuntu ipv6 localhost
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
asked Nov 17 at 18:50
jws
1956
Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
FYI:ifconfigis deprecated. You want to useip addressorip ainstead.
– Bakuriu
Nov 17 at 23:08
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I'm stuck trying to get IPv6 working on a new Ubuntu 16.04 (Xenial Xerus) install. My scenario is very basic - trying to ping the local IPv6 address.
$ ifconfig
enp0s25 Link encap:Ethernet HWaddr b8:ae:ed:77:91:fa
inet6 addr: fe80::ba94:3d5e:9929:4c6e/64 Scope:Link
and
$ ping6 -c 5 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
results in
unknown host
How do I troubleshoot?
ubuntu ipv6 localhost
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
asked Nov 17 at 18:50
jws
1956
I'm stuck trying to get IPv6 working on a new Ubuntu 16.04 (Xenial Xerus) install. My scenario is very basic - trying to ping the local IPv6 address.
$ ifconfig
enp0s25 Link encap:Ethernet HWaddr b8:ae:ed:77:91:fa
inet6 addr: fe80::ba94:3d5e:9929:4c6e/64 Scope:Link
and
$ ping6 -c 5 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
results in
unknown host
How do I troubleshoot?
ubuntu ipv6 localhost
ubuntu ipv6 localhost
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
asked Nov 17 at 18:50
jws
1956
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
asked Nov 17 at 18:50
jws
1956
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
edited Nov 18 at 0:32
Peter Mortensen
8,311166184
8,311166184
asked Nov 17 at 18:50
jws
1956
asked Nov 17 at 18:50
jws
1956
asked Nov 17 at 18:50
jws
1956
1956
Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
FYI:ifconfigis deprecated. You want to useip addressorip ainstead.
– Bakuriu
Nov 17 at 23:08
add a comment |
Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
FYI:ifconfigis deprecated. You want to useip addressorip ainstead.
– Bakuriu
Nov 17 at 23:08
Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
FYI:
ifconfig is deprecated. You want to use ip address or ip a instead.– Bakuriu
Nov 17 at 23:08
FYI:
ifconfig is deprecated. You want to use ip address or ip a instead.– Bakuriu
Nov 17 at 23:08
add a comment |
2 Answers
2
active
oldest
votes
up vote
8
down vote
Works with /64 removed and -I specified. The /64 refers to the number of bits in the mask and shouldn't be used in ping.
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e
PING fe80::ba94:3d5e:9929:4c6e(fe80::ba94:3d5e:9929:4c6e) from fe80::ba94:3d5e:9929:4c6e enp0s25: 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.043 ms
The local interface argument -I can be specified in the address instead by appending % and the interface name:
$ ping6 fe80::ba94:3d5e:9929:4c6e%enp0s25
PING fe80::ba94:3d5e:9929:4c6e%enp0s25(fe80::ba94:3d5e:9929:4c6e) 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=2 ttl=64 time=0.059 ms
...
These combinations don't work:
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
unknown host
or
$ ping6 fe80::ba94:3d5e:9929:4c6e
connect: Invalid argument
answered Nov 17 at 19:24
jws
1956
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
add a comment |
up vote
8
down vote
You should not use the /64 on the address in the ping. That would be the equivalent of using a mask length or mask on the ping command for IPv4. I suppose the ping command was trying to interpret that as a host name.
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
8
down vote
Works with /64 removed and -I specified. The /64 refers to the number of bits in the mask and shouldn't be used in ping.
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e
PING fe80::ba94:3d5e:9929:4c6e(fe80::ba94:3d5e:9929:4c6e) from fe80::ba94:3d5e:9929:4c6e enp0s25: 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.043 ms
The local interface argument -I can be specified in the address instead by appending % and the interface name:
$ ping6 fe80::ba94:3d5e:9929:4c6e%enp0s25
PING fe80::ba94:3d5e:9929:4c6e%enp0s25(fe80::ba94:3d5e:9929:4c6e) 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=2 ttl=64 time=0.059 ms
...
These combinations don't work:
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
unknown host
or
$ ping6 fe80::ba94:3d5e:9929:4c6e
connect: Invalid argument
answered Nov 17 at 19:24
jws
1956
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
add a comment |
up vote
8
down vote
Works with /64 removed and -I specified. The /64 refers to the number of bits in the mask and shouldn't be used in ping.
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e
PING fe80::ba94:3d5e:9929:4c6e(fe80::ba94:3d5e:9929:4c6e) from fe80::ba94:3d5e:9929:4c6e enp0s25: 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.043 ms
The local interface argument -I can be specified in the address instead by appending % and the interface name:
$ ping6 fe80::ba94:3d5e:9929:4c6e%enp0s25
PING fe80::ba94:3d5e:9929:4c6e%enp0s25(fe80::ba94:3d5e:9929:4c6e) 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=2 ttl=64 time=0.059 ms
...
These combinations don't work:
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
unknown host
or
$ ping6 fe80::ba94:3d5e:9929:4c6e
connect: Invalid argument
answered Nov 17 at 19:24
jws
1956
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
add a comment |
up vote
8
down vote
up vote
8
down vote
Works with /64 removed and -I specified. The /64 refers to the number of bits in the mask and shouldn't be used in ping.
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e
PING fe80::ba94:3d5e:9929:4c6e(fe80::ba94:3d5e:9929:4c6e) from fe80::ba94:3d5e:9929:4c6e enp0s25: 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.043 ms
The local interface argument -I can be specified in the address instead by appending % and the interface name:
$ ping6 fe80::ba94:3d5e:9929:4c6e%enp0s25
PING fe80::ba94:3d5e:9929:4c6e%enp0s25(fe80::ba94:3d5e:9929:4c6e) 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=2 ttl=64 time=0.059 ms
...
These combinations don't work:
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
unknown host
or
$ ping6 fe80::ba94:3d5e:9929:4c6e
connect: Invalid argument
answered Nov 17 at 19:24
jws
1956
Works with /64 removed and -I specified. The /64 refers to the number of bits in the mask and shouldn't be used in ping.
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e
PING fe80::ba94:3d5e:9929:4c6e(fe80::ba94:3d5e:9929:4c6e) from fe80::ba94:3d5e:9929:4c6e enp0s25: 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.043 ms
The local interface argument -I can be specified in the address instead by appending % and the interface name:
$ ping6 fe80::ba94:3d5e:9929:4c6e%enp0s25
PING fe80::ba94:3d5e:9929:4c6e%enp0s25(fe80::ba94:3d5e:9929:4c6e) 56 data bytes
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from fe80::ba94:3d5e:9929:4c6e: icmp_seq=2 ttl=64 time=0.059 ms
...
These combinations don't work:
$ ping6 -c 1 -I enp0s25 fe80::ba94:3d5e:9929:4c6e/64
unknown host
or
$ ping6 fe80::ba94:3d5e:9929:4c6e
connect: Invalid argument
answered Nov 17 at 19:24
jws
1956
edited Nov 17 at 21:31
answered Nov 17 at 19:24
jws
1956
answered Nov 17 at 19:24
jws
1956
answered Nov 17 at 19:24
jws
1956
1956
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
add a comment |
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
1
1
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
Is that an answer or a follow-up? This site is not a forum. It is a think tank.
– Peter Mortensen
Nov 18 at 0:33
1
1
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen it’s a valid answer, to Ping a link local network address you must specify the interface and to use a ip6 address with pink you must not specify a / suffix.
– eckes
Nov 18 at 0:42
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
@PeterMortensen This is a perfectly valid answer to the question. In fact it is even a better answer than the one posted later. This answer gives examples of valid syntax and points out that there are two different ways to specify the interface.
– kasperd
Nov 18 at 9:31
add a comment |
up vote
8
down vote
You should not use the /64 on the address in the ping. That would be the equivalent of using a mask length or mask on the ping command for IPv4. I suppose the ping command was trying to interpret that as a host name.
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
add a comment |
up vote
8
down vote
You should not use the /64 on the address in the ping. That would be the equivalent of using a mask length or mask on the ping command for IPv4. I suppose the ping command was trying to interpret that as a host name.
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
add a comment |
up vote
8
down vote
up vote
8
down vote
You should not use the /64 on the address in the ping. That would be the equivalent of using a mask length or mask on the ping command for IPv4. I suppose the ping command was trying to interpret that as a host name.
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
You should not use the /64 on the address in the ping. That would be the equivalent of using a mask length or mask on the ping command for IPv4. I suppose the ping command was trying to interpret that as a host name.
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
edited Nov 18 at 1:43
Twisty Impersonator
17.3k126293
17.3k126293
answered Nov 17 at 19:33
Ron Maupin
3,04011021
answered Nov 17 at 19:33
Ron Maupin
3,04011021
answered Nov 17 at 19:33
Ron Maupin
3,04011021
3,04011021
add a comment |
add a comment |
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Bonk... I had tried that and got invalid argument, but, at that time I didn't specify -I also. Thanks!
– jws
Nov 17 at 18:55
superuser.com/questions/1005335/…
– harrymc
Nov 17 at 19:26
FYI:
ifconfigis deprecated. You want to useip addressorip ainstead.– Bakuriu
Nov 17 at 23:08