Salutare! La prima mea intilnire efectiva cu ipv6 (pus ipv6 de la edge
la nod) am intilnit o chestie foarte ciudata legata de ping ..
se da un /48 ce am zis ca il impartim in /64 pentru un management mai
usor (un plus exista posibilitatea ca upstream-ul sa poata sa ia o
decizie diferita de rutare pentru o clasa anume dedicata unui scop
specific) .. so, datele problemei arata asa :
GATEWAY : MYNET::1/48
DESKTOP : MYNET::aa/64
IPV4DESKTOP != IPV4 storage02 (dar ambele publice)
GW = L3 hp switch
storage02 = EL7
DESKTOP = fedora27
Testele
[root@storage02 ~]# ip -6 -o a show dev enp2s0f1 scope global
5: enp2s0f1 inet6 MYNET:1::22/48 scope global noprefixroute
[root@storage02 ~]# ping6 -qc 10 MYNET::1
PING MYNET::1(MYNET::1) 56 data bytes
--- MYNET::1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9013ms
rtt min/avg/max/mdev = 1.035/7.611/62.753/18.393 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
[root@storage02 ~]# ping6 -qc 10 MYNET::aa
PING MYNET::aa(MYNET::aa) 56 data bytes
--- MYNET::aa ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9208ms
rtt min/avg/max/mdev = 0.122/0.152/0.194/0.027 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
######################################################################
[root@storage02 ~]# ip -6 -o a show dev enp2s0f1 scope global
5: enp2s0f1 inet6 MYNET:1::22/64 scope global noprefixroute
[root@storage02 ~]# ping6 -qc 10 MYNET::1
PING MYNET::1(MYNET::1) 56 data bytes
--- MYNET::1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9011ms
rtt min/avg/max/mdev = 0.987/3.824/26.409/7.535 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
[root@storage02 ~]# ping6 -qc 10 MYNET::aa
PING MYNET::aa(MYNET::aa) 56 data bytes
--- MYNET::aa ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9242ms
rtt min/avg/max/mdev = 0.119/0.146/0.175/0.019 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
######################################################################
[root@storage02 ~]# ip -6 -o a show dev enp2s0f1 scope global
5: enp2s0f1 inet6 MYNET::200/64 scope global noprefixroute
[root@storage02 ~]# ping6 -qc 10 MYNET::1
PING MYNET::1(MYNET::1) 56 data bytes
--- MYNET::1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9012ms
rtt min/avg/max/mdev = 1.011/10.705/89.338/26.233 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
[root@storage02 ~]# ping6 -qc 10 MYNET::aa
PING MYNET::aa(MYNET::aa) 56 data bytes
--- MYNET::aa ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9228ms
rtt min/avg/max/mdev = 0.150/0.182/0.249/0.032 ms
^^^^^^^^^^^^^^^^^^^^^^^^^
######################################################################
IPv4 reference
[root@storage02 ~]# ping -qc 10 IPV4GW
PING IPV4GW (IPV4GW) 56(84) bytes of data.
--- IPV4GW ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9115ms
rtt min/avg/max/mdev = 0.688/3.278/12.293/4.376 ms
[root@storage02 ~]# ping -qc 10 IPV4DESKTOP
PING IPV4DESKTOP (IPV4DESKTOP) 56(84) bytes of data.
--- IPV4DESKTOP ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9212ms
rtt min/avg/max/mdev = 0.119/0.149/0.189/0.024 ms
Intrebarile sunt :
1. de ce indiferent de ip al storage02 pingul la desktop e minimal?
2. de ce variaza rtt-ul in functie de subnet? din ce vad minimul e cand
storage02 are MYNET:1::22/64
Exista anumite optiuni ce _trebuiesc_ activate pe switch desi sunt la
categoria "optionale"?
Multumesc frumos de ajutor si lamuriri!!
Adrian
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