Hi,

I have the following thing happen between almost -current systems.
One system (spade) is IPv4 only, the other is IPv6/v4 dual (phil).
The strange thing is when connecting from v6/v4 host to the v4 only
(I use telnet as example, ftp is exacly the same behaviour):

1st try:

phil# telnet spade
Trying 8d21:f101:3334:3030:3a37:3036:383a:3639...
# a timeout of about 2 mins happens here !!!
# and I have no idea where this IPv6 address comes from!
telnet: connect to address 8d21:f101:3334:3030:3a37:3036:383a:3639: Connection time
d out
Trying 141.33.241.1...
Connected to spade.

and everything is fine - only I don't know whre the mystyrious IPv6 address
comes from and what this timeout means.

2nd try:

phil# telnet spade.apc.aip.de
telnet: non-recoverable failure in name resolution: Undefined error: 0

??? what does this mean?

3rd try:

phil# telnet 141.33.241.1
Connected to spade.

almost immediately and everything is fine.

DNS is fine (phil itself is NS for the IPv4 and IPv6 names - no reverse mapping
of IPv6 so far). phil is phil.ipv6.apc.aip.de on IPv6 and the FQDNs for
IPv4 are phil.apc.aip.de resp. spade.apc.aip.de.
resolv.conf on phil has "search apc.aip.de ipv6.apc.aip.de"

Any ideas?

Gretings

Andreas