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Hi-
I'm having an interesting problem with a few new 2810-48G
switches.
When the 2810 is up-linked to another switch and TAGGED VLANs are
allowed on the uplink port, the CPU utilization jumps up to 45 - 55%,
and the interfaces get sluggish, even with no devices connected to the
2810 switch.
When the uplink connection doesn't have tagged VLANs, just one
untagged (normal) vlan, the CPU utilization drops to around 3-5% which
is normal I believe.
All my switches are ProCurve, and when I replace the 2810 in
question with a 2824, it performs perfectly. However, connecting any
devices (servers, PCs, etc.) to the 2810 when it has this high CPU
utilization causes lots of dropped packets, higher ping times, and
general network sluggishness.

Has anyone seen anything like this before?

thanks,
erik

PS -
Here is some more info about the setup, and how to cause the CPU
utilization to go nuts:

Two switches, constant configuration, and two possible wiring options:

Parent Switch: 5308XL
Child Switch: 2810-48G

Vlan Configuration:
Parent:
* Port E4: VLANs 1,2,19, and 3260 Tagged. None untagged.
* Port E2: VLAN 1 untagged, none tagged.

Child:
* Port 1: VLANs 1,2,19, and 3260 tagged. None untagged.
* Port 2: VLAN 1 untagged, none tagged.

The parent is the backbone switch to which many things are connected,
it handles lots of traffic and works great. The child has nothing
connected to it presently except it's link with the parent which I
change between wiring configuration A and B

Wiring Configuration A:
An ethernet cable is run between Parent:E2 and Child:2

Wiring Configuration B:
An ethernet cable is run between Parent:E4 and Child:1

In either configuration there is only one link between the parent and
the child, and nothing else is plugged into the child.

Now, whenever I am in wiring configuration A, the CPU utilization on
the child (2810) switch is low (3-5%). When I switch to wiring
configuratino B (i.e. unplug the cable and move it to the new ports)
the CPU utilization goes up to 45-55%, the interfaces (both telnet and
web) become very sluggish, and if I attach devices to it, packets are
dropped, ping times get high , etc.

I have three new 2810 switches, all with the N_10_09 firmware, and
have replicated this problem with two of them (haven't tried with the
third) , so it doesn't seem to
be broken hardware unique to one box.

Anyone else seen anything like this?

Rick Jones · Guest

I do not want to discourage ProCurve questions here, but will suggest
that one or more of the HP ITRC Forums may have a better shot at being
seen by folks in HP ProCurve land. So, if you don't get much of an
answer here in the next few days, you may want to try asking there.

rick jones
--
firebug n, the idiot who tosses a lit cigarette out his car window
these opinions are mine, all mine; HP might not want them anyway... smile

feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

Guest

On Jun 1, 1:57 pm, Rick Jones <rick.jon...@hp.com> wrote: