[rbak-nsp] ipv6 - strange ?? (ping)

[Marcin Kuczera]

Look at that, I have IPv6 /32 prefix, advertised via BGP.
Both peers are UP.
Neighbor              AS  MsgRcvd  MsgSent    TblVer  InQ OutQ Rst 
Up/Down  PfxRcvd/Sent
2001:7f8:42::a500:8545:1     8545     3095     3491     22392    0    0 
  14    2d01h     38      1
2a01:1d8:7fff:fffd:1::16    15744    11432     7919     22392    0    0 
   4    2d08h   1579      1

My interfaces:

Intf name:      vlan101
Intf state:     Up                        IPv6 MTU:       1500 
       Description:    Silweb
Address:        2a01:1d8:7fff:fffd:1::15  Prefix len:     126 
       Link local addr:fe80::230:88ff:fe12:59f  Number of Bound Circuits 
(incl. dynamic) = 1

Intf name:      vlan102
Intf state:     Up                        IPv6 MTU:       1500 
       Description:    PLIX
Address:        2001:7f8:42::a501:3000:1  Prefix len:     64 
       Link local addr:fe80::230:88ff:fe12:59f  Number of Bound Circuits 
(incl. dynamic) = 1

Intf name:      vlan201
Intf state:     Up                        IPv6 MTU:       1500 
       Description:    serwerownia komercyjna
Address:        2a02:c40:1::1             Prefix len:     48 
       Link local addr:fe80::230:88ff:fe12:5a0  Number of Bound Circuits 
(incl. dynamic) = 1

##################
now - the problem (vlan101):
[bgp1]RedBack_SE100#ping 2a01:1d8:7fff:fffd:1::15
PING6 2a01:1d8:7fff:fffd:1::15 : 8 data bytes
timeout is 1 second, source 2a01:1d8:7fff:fffd:1::15
.....
--- 2a01:1d8:7fff:fffd:1::15 ping6 statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
[bgp1]RedBack_SE100#ping 2a01:1d8:7fff:fffd:1::16
PING6 2a01:1d8:7fff:fffd:1::16 : 8 data bytes
timeout is 1 second, source 2a01:1d8:7fff:fffd:1::15
.....
--- 2a01:1d8:7fff:fffd:1::16 ping6 statistics ---
5 packets transmitted, 0 packets received, 100% packet loss

1  2a01:1d8:7fff:fffd:1::15  3.955 ms  3.489 ms  3.761 ms
[bgp1]RedBack_SE100#trace 2a01:1d8:7fff:fffd:1::16
traceroute6 to 2a01:1d8:7fff:fffd:1::16 from 2a01:1d8:7fff:fffd:1::15, 
30 hops max, 12 byte packets
1  * * *
^C[bgp1]RedBack_SE100#trace 2a01:1d8:7fff:fffd:1::15
traceroute6 to 2a01:1d8:7fff:fffd:1::15 from 2a01:1d8:7fff:fffd:1::15, 
30 hops max, 12 byte packets
1  2a01:1d8:7fff:fffd:1::15  4.172 ms  1.481 ms  1.656 ms

(vlan102):
[bgp1]RedBack_SE100#ping 2001:7f8:42::a500:8545:1
PING6 2001:7f8:42::a500:8545:1 : 8 data bytes
timeout is 1 second, source 2001:7f8:42::a501:3000:1
!!!!!

--- 2001:7f8:42::a500:8545:1 ping6 statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/std-dev = 6.649/7.014/7.445/0.317 ms
[bgp1]RedBack_SE100#ping 2001:7f8:42::a501:3000:1
PING6 2001:7f8:42::a501:3000:1 : 8 data bytes
timeout is 1 second, source 2001:7f8:42::a501:3000:1
.....
--- 2001:7f8:42::a501:3000:1 ping6 statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
[bgp1]RedBack_SE100#trace 2001:7f8:42::a501:3000:1
traceroute6 to 2001:7f8:42::a501:3000:1 from 2001:7f8:42::a501:3000:1, 
30 hops max, 12 byte packets
1  2001:7f8:42::a501:3000:1  3.839 ms  2.355 ms  2.785 ms


What is going wrong ???
Is it so unstable or what ???
SEOS 6.1.4.1.p4


Regards,
Marcin