Hello Andreas,
If I remember correctly the Sun Ray determines the mtu for the Server
Client communication.
So you can keep the Servers network interface mtu on 1500.
The Sun Ray server can handle different mtu settings for different Sun
Ray clients.
If the Sun Ray boots it will inform the Sun Ray server which mtu size it
wants to use.
So you need to tell your Sun Ray at home what it needs to use, so it
will inform the Sun Ray server to not exceed this mtu size.
There are several ways to do this:
1. Use the GUI-popup on the Sun Ray to set the mtu size to 1426.
2. Use DHCP option 26 to set the mtu size of the Sun Ray to 1426
Sometimes you are in a situation were you don't want to use the
GUI-popup and your DHCP server can not set option 26 or you have no
control over the DHCP server. Then your last resort is to set the mtu
size from the Sun Ray server.
The Sun Ray will boot with mtu 1500. Then it will receive the mtu
setting from the Sun Ray server.
The Sun Ray will then reboot with the mtu settings it has received from
the Sun Ray server.
The Sun Ray will then inform the Sun Ray server it is running with this
new mtu size.
For this last resort option you need to set the MTU in the .parms files
in /tftpboot (MTU=1426).
See man -M /opt/SUNWut/man utfwadm for more information on this.
Ivar
Andreas v. Heydwolff schreef:
What would be a solution for this one?
The setup: In the office SRSS4.2 on Linux (Debian, as it were), at home
Windows XP in VBox on Linux with the Sun Ray soft client installed. I
drilled holes through my firewalls and got the soft client working. So
far, so good.
WAN MTU without fragmentation is 1426, so I changed yesterday the SRSS
server's and the soft client's MTU to 1426. Now I realized that a
database client in said SRSS server cannot open database files on
another server in the LAN while the MTU is 1426 on the SRSS server and
1500 on the database server. Resetting the former to 1500 of course
solved this problem - but I'm in the office now, and I suppose using the
soft client from home with this setup would mean much more fragmented
packet traffic through the bottleneck uplink and worse graphics performance.
How could I configure SRSS to have an MTU of 1426 via LAN and WAN to my
home, and 1500 internally? Or should I set MTUs to 1426 in all nodes of
the LAN - might be a bit tedious? Or connect the SRSS server to the WAN
through an extra NIC (and both firewalls... ugh) - or is this the
typical scenario and reason for using a VPN connection, with OpenVPN as
it were, and an own MTU there (if this is possible at all)?
Any help appreciated...
Best regards,
Andreas Heydwolff
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