Am 24.03.2014 14:18, schrieb Chris Bagnall:
Greetings list,
I appreciate this is something of a blast from the past, but I'm
hoping some of you will still have 1.2 systems in use and might be
able to shed some light on this.
Recently, one of our clients sublet part of their building to another
company, and asked me to split their LAN into separate VLANs so the
new tenant didn't have access to their LAN. They had decent HP managed
switches already, so that bit was easy. I created VLAN 200 on the
pfSense, tagged that port on the switches, and assigned the new
tenant's ports to use that PVID (untagged). All well and good.
However, the new tenant found that performance was erratic - certain
websites loaded instantly, but others wouldn't load at all. This
normally screams classic MTU problems, in my experience, but I
normally see these on weird WAN connections, not on the LAN.
Does anyone know if there are/were 'problems' with 1.2 and VLAN MTUs
on ALIX platforms (ethernet driver 'vr'), and whether an update to 1.3
might fix it? This is old hardware with only 128MB RAM, so jumping to
2.x is optimistic.
The site in question is a couple of hundred miles away from me, so
'try it and see' isn't really an option in this case. :-)
Thanks in advance.
Kind regards,
Chris
I've had to debug a similar setup which was running for 4 years.
I don't know why it suddenly stopped working.
The problem was that with 1.2.3 the MRU was set to the same value as the
MTU which dropped received frames with a size of 1514 (1510 +4 vlan tag).
The whole setup should not have worked in the first place. My solution
was to upgrade everything to 2.1 but that was on the ALIX board with
256MB ram.
Regards
Matthias
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