Yes, you are right.
We use HSSI card for DS3 connection in cisco 7507 Frame-relay connection.
We don't have any problem with HSSI card performance.
But usually switch environment from provider has some limitation.
For an example, from lucent B-STDX 9000 switch, you can install two port
HSSI card in one slot.
But you can not exceed more than 44Mbps.
That means if you connect full DS3 into one port, you can not use another
port at all.
If you istall 5Mbps into one port, you can connect to another port up to
39Mbps speed.
From Cisco MGX switch, it's similar.
There is two port HSSI card. But you can not exceed more than 52Mbps total
from one interface slot - so called line-.
But if you have router-to-router connection via HSSI and DS3 TSU or
cross-connection via HSSI cable,
you can use full speed without any problem.
Hyun
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hyunseog Ryu / CCDA, MCSE
Network Engineer/Applications Engineering
Norlight Telecommunications, Inc.
The Guardians of Data
275 North Corporate Drive
Brookfield, WI 53045-5818
Tel. +1.262.792.7965
Fax. +1.262.792.7733
Siva
Valliappan To: grr@shandakor.tharsis.com (George Robbins)
<svalliap@cis cc: jared@puck.nether.net, kevin@gannons.net,
co.com> cisco-nsp@puck.nether.net, (bcc: Hyunseog
Ryu/Brookfield/Norlight)
03/12/2001 Fax to:
05:30 PM Subject: Re: [nsp] HSSI Card Limitations ?
i think i know where the 16 mbps limit comes from. now i am not very
knowledgeable on the wan-switching product line but i believe one of
the HSSI ports there is limited to 16 mbps. on the router side, all
the HSSI PAs can handle line rate.
regards
.siva
>
> Yes... Everybody uses them at 45mb/s for t3's, they work well.
>
> There is no Cisco imposed limitation on frame-relay PVC's.
>
> Some providers may impose a limitation, for instance Bell Atlantic
> aka Verizon aka VADI won't set up public frame PVC's of more than
> 2mbit/sec on a t3, and while you can set up 4-6 of them and route
> across the set, this is a diminishing returns games.
>
> Other providers (uunet loves frame) will have other rules.
>
> George
>
> > From cisco-nsp-request@puck.nether.net Mon Mar 12 16:19:35 2001
> > Resent-Date: Mon, 12 Mar 2001 15:53:31 -0500
> > Received-Date: Mon, 12 Mar 2001 15:51:03 -0500
> > X-Sender: kevin@216.122.217.122
> > Date: Mon, 12 Mar 2001 20:44:08 +0000
> > To: Jared Mauch <jared@puck.nether.net>
> > From: Kevin Gannon <kevin@gannons.net>
> > Subject: Re: [nsp] HSSI Card Limitations ?
> > Cc: cisco-nsp@puck.nether.net
> > In-Reply-To: <20010312152651.V22147@puck.nether.net>
> > References: <5.0.2.1.0.20010312195919.00a4a0e0@216.122.217.122>
> > <5.0.2.1.0.20010312195919.00a4a0e0@216.122.217.122>
> > Resent-From: cisco-nsp@puck.nether.net
> > X-Mailing-List: <cisco-nsp@puck.nether.net> archive/latest/5660
> > X-Loop: cisco-nsp@puck.nether.net
> > Precedence: list
> > Resent-Sender: cisco-nsp-request@puck.nether.net
> >
> > At 03:26 PM 3/12/01 -0500, Jared Mauch wrote:
> > >On Mon, Mar 12, 2001 at 08:01:12PM +0000, Kevin Gannon wrote:
> > > > We are looking at using a HSSI interface on a 7200 for frame realy
> > > > connectivity. One of my customers mentioned that there is a
limitation
> > > > of 16Mbps on the Cisco cards.
> > > >
> > > > Is anyone running a HSSI card at higher speeds ?
> >
> > I know that HSSI can manage 52Mbs but I mean can the
> > Cisco's push the cards full rate. Sounds very daft I
> > know a 7200 can push well in excess of this I am more worried
> > about some Cisco "feature" with the PA's themself.
> >
> > I have hit things like this with ATM cards and VBR
> > PVC's on the 7500 AIP's Grrrrrrrrr. I love when the
> > TAC tell you these features and then say they are not
> > documented.
> >
> > Thanks & Regards,
> > Kevin
> > > Yes.
> > >
> > > These cards can do 45M+
> > >
> > > I'm sure people in europe will comment on 50M+ (E3's)
> > >
> > > - Jared
> > >
> > >--
> > >Jared Mauch | pgp key available via finger from jared@puck.nether.net
> > >clue++; | http://puck.nether.net/~jared/ My statements are only
mine.
> >
> >
>
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