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[Discuss] puzzle

kent borg wrote:
> On 4/28/23 11:20, dan moylan wrote:
>> never used IPv6 -- don't know how.

> Given:
>    root at tinpan:~# ifconfig
>        .
>        .
>        .
>    wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>? mtu 1500
>    ??????? inet 10.0.0.183? netmask 255.255.255.0? broadcast 10.0.0.255
>    ??????? inet6 fe80::2880:cdbb:714:2a91? prefixlen 64? scopeid 0x20<link>
>    ??????? inet6 fd30:aa83:f3c6:0:3422:ecc1:2289:4038? prefixlen 64? scopeid 0x0<global>
>    ??????? inet6 fd30:aa83:f3c6::d34? prefixlen 128? scopeid 0x0<global>
>    ??????? inet6 fd25:3cb2:b5fc:0:e075:f8a2:36b2:c08a? prefixlen 64?
>        .
>        .
> On a different machine:
>
>    kentborg at la:~$ ping fd30:aa83:f3c6::d34
>    PING fd30:aa83:f3c6::d34(fd30:aa83:f3c6::d34) 56 data bytes
>    64 bytes from fd30:aa83:f3c6::d34: icmp_seq=1 ttl=64 time=48.1 ms
>    64 bytes from fd30:aa83:f3c6::d34: icmp_seq=2 ttl=64 time=67.1 ms
>        .
>        .
 
so, on alphacent:
   ifconfig:
       .
       .
   wlp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    19         inet 192.168.12.148  netmask 255.255.255.0  broadcast 192.168.12.255
    20         inet6 2607:fb91:2d15:c913:ad69:ea89:d38b:7bdc  prefixlen 64  scopeid 0x0<glob
    21         inet6 fe80::4a29:6810:625:19d  prefixlen 64  scopeid 0x20<link>
    22         inet6 2607:fb91:2d15:c913:4d94:954d:ef54:184b  prefixlen 128  scopeid 0x0<g
       .
       .

on aldeberon:
    ping 2607:fb91:2d15:c913:ad69:ea89:d38b:7bdc [0% packet loss]
    ping fe80::4a29:6810:625:19d                 [100% packet loss]
    ping 2607:fb91:2d15:c913:4d94:954d:ef54:184b [0% packet loss]

aaarrrghhh!
all of a sudden, ping alphacent is also successful.
thanks for your help.
i give up.

ole dan


ole dan

j. daniel moylan
84 harvard ave
brookline, ma 02446-6202
617-777-0207 (cel)
jdm at moylan.us
www.moylan.us
[BLM]