The LRE product line basically consists of three products:
* the 2924-XL-EN-LRE Switch (4 x 10/100 ports + 24 LRE ports
via telco connector)
* a central splitter (48 ports to the pbx, 48 ports to the
LRE switch, 48 ports to the CPEs)
* the CPE (1 port for ethernet, 1 port to the splitter,
1 port to the phone)
pc -----I I-- PBX
---I I
CPE----(1 pair of copper)---splitter
---I I
phone --I I-- LRE Switch
the LRE switch internally uses VDSL to archive data rates up to
15 mbps full duplex over 1 pair of copper.
For details have a look at:
http://www.cisco.com/warp/public/cc/pd/si/casi/ca2900lr/prodlit/index.shtml
AFAIK the list prices are:
6495 USD for the 2924 LRE
280 USD for the CPE
1395 USD for the splitter
here are the results of my tests:
1. At 1400 meters cable length you get about 600 KByte/s
At 800 meters about 950 KByte/s
I didn't test shorter cables, but you should get
about 1400 KByte/s below 700 meters or so.
cable lengths over 1400 meters didnt work.
2. no automatic rate adaption, you'll have to
use the interface command "lre profile xxxx"
to set a lower speed if connection fails
3. there are 6 lre profiles
15-LRE
10-LRE
5-LRE
15-LRE-LL
10-LRE-LL
5-LRE-LL
I don't know what the "LL" means, but I found out, that
you get higher data rates with the LL profiles
4. Analogous phone and data on the same pair of copper
works fine. ISDN should work. I tested it, but didn't
get it running :-(
5. Nice diagnostics with "sh contr lre ..."
Overall it seems to run quite stable.
Thanks again to Cisco for early possibility to the LRE stuff!
Stefan Gasteiger
E-Mail: Stefan.Gasteiger@gendorf.de
> -----Original Message-----
> From: Charles Sprickman [mailto:spork@inch.com]
> Sent: Friday, July 06, 2001 5:41 AM
> To: Stefan.Gasteiger@Gendorf.de
> Cc: cisco-nsp@puck.nether.net
> Subject: Re: PVLAN on 2924-LRE
>
>
> I'm interested in the answer, but don't know it... I'm even more
> interested in how well this works, and what the street price is.
>
> Can you share some of your experiences with the "LRE"
> feature? I've seen
> a prototype thing that is basically an out-of-spec hub that
> "boosts" the
> signal on the line to get it out two to three times further
> than ethernet.
> Is anyone aware if that's the same thing at work here?
>
> Thanks,
>
> Charles
>
> On Thu, 5 Jul 2001 Stefan.Gasteiger@Gendorf.de wrote:
>
> > I'm just playing with the Cisco LRE (long range ethernet) solution.
> > Under
> >
> http://www.cisco.com/warp/public/cc/pd/si/casi/ca2900lr/prodli
t/lreso_ds.htm
> it says about the Catalyst 2924-XL-EN-LRE
> "Private VLAN Access enables per port security,
> requiring only a VLAN on every switch, not every port.
> This feature greatly minimizes the number of VLANs required."
>
> I know how to configure pVLANs on CatOS based switches (65xx),
> but how can I do this on an IOS based switched like the 2924-LRE ?
>
> TIA,
>
> Stefan Gasteiger
> E-Mail: Stefan.Gasteiger@gendorf.de
>
>
>
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