>>> Lars Marowsky-Bree <[email protected]> schrieb am 27.08.2012 um 12:59 in
>>> Nachricht
<[email protected]>:
> On 2012-08-27T12:14:46, Ulrich Windl <[email protected]>
> wrote:
>
> > Hi!
> >
> > I set up a Clustered Samba Server with SLES11 SP2 according to the manual
> "Chapter 18. Samba Clustering". Everything seems to run now, but I cannot
> reach the configured clustered IP address from an outside host. Local pings
> on the IP address work though.
> >
> > Are there any instructions how to debug the clustered IP address. I'm
> lacking the background, I'm afraid.
>
> Perhaps your switch or router are filtering the multicast MAC address
> that the hosts respond with to the ARP lookup?
Hi!
The network guys say no. Should "arp" show the Cluster-IP? I cannot see it, so
I wonder if something's wrong. Could the "martian source" thing be responsible?
I see this for the ARPs:
Aug 29 09:21:35 o1 kernel: [ 1261.556861] martian source 172.20.3.59 from
172.20.3.59, on dev br0
BTW: Inspecting the RA, I found a small problem with the MAC address:
IF_MAC=`echo $OCF_RESKEY_ip $NETMASK $BRDCAST | \
md5sum | \
sed -e 's#\(............\).*#\1#' \
-e 's#..#&:#g; s#:$##' \
-e 's#^\(.\)[02468aAcCeE]#\11#'`
Specifically in "#\11#", shouldn't that be "#\13#"? (MAC & 1) is the I/G-bit,
while (MAC & 2) is the U/L-bit. So if the address is locally assigned
(Administered) (which I guess is), the bit should be also set (says Wikipedia).
I could suggest to use the following code instead:
OUI=0x873184 # 24 bits used for OCF Cluster IP addresses
HASH=$(echo $OCF_RESKEY_ip $NETMASK $BRDCAST | md5sum | cut -c 1-6) # 24 bits
IF_MAC=$(printf "%06x$HASH" $(( (OUI & 0x3fffff) | 0xc00000 )) | sed -e
's/../&:/g; s/:$//')
For unset variables "$OCF_RESKEY_ip $NETMASK $BRDCAST" I get:
# echo $IF_MAC
c7:31:84:68:b3:29
# echo | md5sum
68b329da9893e34099c7d8ad5cb9c940 -
(Tested with BASH 3.2.51 and coreutils-8.12-6.23.1)
>
> Can you get the network trace of the arp traffic on the router into the
> subnet when an outside ping comes in?
I see this on the host (one cluster node):
o1:~ # tcpdump -p -i br0 -s100 -v -n host 172.20.3.59
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 100 bytes
09:43:38.305460 arp who-has 172.20.3.59 tell 172.20.3.62
09:43:38.305493 arp reply 172.20.3.59 is-at f1:e9:91:b1:b9:51
(172.20.3.62 is the gateway) Packets also arrive via broadcast:
09:45:03.826371 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP
(17), length 271) 172.20.3.59.138 > 172.20.3.63.138: NBT UDP PACKET(138)
09:45:13.836608 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP
(17), length 271) 172.20.3.59.138 > 172.20.3.63.138: NBT UDP PACKET(138)
But I cannot connect:
# smbclient -U tester -L 172.20.3.59
Enter tester's password:
Connection to 172.20.3.59 failed (Error NT_STATUS_UNSUCCESSFUL)
Still don't know where to start debugging.
Regards,
Ulrich
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