[GLLUG] Help please HP ProCurve 1800-24G managed switch

[David Geary]

Hi Chris,

The behaviour you are seeing is expected behaviour for any smart Ethernet
switch including managed switches. If it hasn't learned (or forgot) which
port a given MAC address is attached to, it broadcasts all packets for that
MAC address out of all ports (on the same VLAN in the case of a managed
switch).

Some managed switches allow setting static ARP table entries. The ARP table
maps MAC addresses to ports. Your problem arises when there is no entry for
the MAC address of the device in the ARP table. The HP ProCurve 1800-24G
does not provide this functionality.

The device you are looking for, which does switching and routing, is called
a layer 3 switch. Unfortunately the HP ProCurve 1800-24G is not a layer 3
switch.

The manuals for the HP ProCurve 1800-24G are available at the following
locations
https://ftp.hp.com/pub/networking/software/1800-24G-InstGde-Oct2006-59914724.pdf
http://ftp.ext.hp.com/pub/networking/software/1800-MgtCfgGde-Oct2006-59914726.pdf

The options I can see are:
- Get a layer 3 switch and use routing to select the correct port on the
CCTV recorder side
- Get 2 managed switches (they don't have to be the same brand) put each
camera and CCTV port pair on a separate VLAN and trunk each of the VLANs
over the single cable between the 2 switches
- Run a cable for each camera direct to the CCTV recorder

There might be more options I haven't thought of.

I hope this helps.

--
David Geary

On Wednesday, November 27, 2024, Chris Bell via GLLUG <
gllug at mailman.lug.org.uk> wrote:
> Hello,
>
> I am looking for an ethernet switch that allows me to route some specific
IP addresses to specific switch ports, and have seen a refurbished HP
ProCurve 1800-24G managed switch on ebay. Would it do the job?
>
> I have some CCTV cameras connected to a remote switch, a single ethernet
downlink to a local switch acting as a splitter to connect to multiple
10/100 input ports to a CCTV recorder. I have had a problem with an old
"smart" switch which if the relevant camera IP address is not present first
or later disappears then the switch throws all available data at the
required port, the recorder is overloaded, and other cameras then disappear.
>
> Thanks for any advice.
>
> --
>
> Chris Bell
>
> www.chrisbell.org.uk

-- 
David Geary
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