I can't get the serial number of rslcom.co.uk from the secondarie s

[Andy Cranston]

I have recently inherited responsibility for the primary DNS server for the
domains  "rsl-europe.com" and "rslcom.co.uk".  The primary and secondaries
for these zones are, as  far as I'm aware:

    dns.rsl-europe.com   (Primary)   195.153.219.70
    sec1.dns.uk.psi.net   (Secondary)   154.32.105.34
    sec2.dns.uk.psi.net   (Secondary)   154.32.107.34

The primary is running BIND 8.2.1 behind a firewall using network address
translation.  The two secondaries are run by our ISP PSI Net.

When I make an update to the "rsl-europe.com" domain I can see the two
secondaries pull the zone a few seconds later - they obviously honour
NOTIFY.  When I make a similar update to  the "rslcom.co.uk" domain I don't
see any activity from the secondaries.

My first thought was that the serial number was out of sync on the
secondaries so I did the following to try and find out the serial number on
one of the secondaries:

-----------------8<---CUT HERE--->8-------------------

nslookup - 154.32.105.34
Specifying a nameserver has overridden the switch policy order.
The reset command will reinstate the order specified by the switch policy.
Default Name Server:  sec1.dns.uk.psi.net
Address:  154.32.105.34

> set type=soa
> rslcom.co.uk.
Name Server:  sec1.dns.uk.psi.net
Address:  154.32.105.34

Trying DNS
Authoritative answers can be found from:
rslcom.co.uk    nameserver = sec2.dns.uk.psi.net
rslcom.co.uk    nameserver = dns.rsl-europe.com
rslcom.co.uk    nameserver = sec1.dns.uk.psi.net
sec2.dns.uk.psi.net     internet address = 154.32.107.34
dns.rsl-europe.com      internet address = 195.153.219.70
sec1.dns.uk.psi.net     internet address = 154.32.105.34
>

-----------------8<---CUT HERE--->8-------------------

Odd I thought - it tells me that sec1.dns.uk.psi.net is authoritative but
that's the server I asked!  This should give me a clue but it just doesn't
click :-(

I then tried the other secondary:

-----------------8<---CUT HERE--->8-------------------

nslookup - 154.32.107.34
Specifying a nameserver has overridden the switch policy order.
The reset command will reinstate the order specified by the switch policy.
Default Name Server:  sec2.dns.uk.psi.net
Address:  154.32.107.34

> set type=soa
> rslcom.co.uk.
Name Server:  sec2.dns.uk.psi.net
Address:  154.32.107.34

Trying DNS
Authoritative answers can be found from:
(root)  nameserver = E.ROOT-SERVERS.NET
(root)  nameserver = I.ROOT-SERVERS.NET
(root)  nameserver = M.ROOT-SERVERS.NET
(root)  nameserver = L.ROOT-SERVERS.NET
(root)  nameserver = K.ROOT-SERVERS.NET
(root)  nameserver = J.ROOT-SERVERS.NET
(root)  nameserver = B.ROOT-SERVERS.NET
(root)  nameserver = F.ROOT-SERVERS.NET
(root)  nameserver = G.ROOT-SERVERS.NET
(root)  nameserver = C.ROOT-SERVERS.NET
(root)  nameserver = H.ROOT-SERVERS.NET
(root)  nameserver = A.ROOT-SERVERS.NET
(root)  nameserver = D.ROOT-SERVERS.NET
E.ROOT-SERVERS.NET      internet address = 192.203.230.10
I.ROOT-SERVERS.NET      internet address = 192.36.148.17
M.ROOT-SERVERS.NET      internet address = 202.12.27.33
L.ROOT-SERVERS.NET      internet address = 198.32.64.12
K.ROOT-SERVERS.NET      internet address = 193.0.14.129
J.ROOT-SERVERS.NET      internet address = 198.41.0.10
B.ROOT-SERVERS.NET      internet address = 128.9.0.107
F.ROOT-SERVERS.NET      internet address = 192.5.5.241
G.ROOT-SERVERS.NET      internet address = 192.112.36.4
C.ROOT-SERVERS.NET      internet address = 192.33.4.12
H.ROOT-SERVERS.NET      internet address = 128.63.2.53
A.ROOT-SERVERS.NET      internet address = 198.41.0.4
D.ROOT-SERVERS.NET      internet address = 128.8.10.90
>

-----------------8<---CUT HERE--->8-------------------

Now I'm really confused.  If I've messed something up on my primary I would
guess both secondaries would display the same behaviour but they don't.

Nothing in my syslog on the primary server looks odd.  The zone loads ok on
the primary after an update.

I can post the zone file(s) if requested but this post is long enough
already :-)

If anyone can explain what is going on I'd greatly appreciate it.  If you
need any more information please ask.

TIA

Andy Cranston,
RSL COM Europe.