3640 Gigabit

[JW]

I could have sworn that a couple of weeks ago on the web I found a
gigabit ethernet module for the 3640 router. Now I can't seem to find it
and it appears that the 3640 doesn't support gigabit. Is this correct?

If the 3640 doesn't support gigabit what is the least expensive router
that does? Looking through the cisco site the lowest end router I can
find is the 7000 series.

Can someone please point me in the right direction?

Thanks

[joe]

is this for a lab ?

the 3640 can barely handle 90Mbps (80% to 90% CPU) with CEF over fast ethernet
on same interface, multiple interfaces, and at any packet size (i tested them a
all here)

My 3640 are between to subnets with powerful switches (6509's) with big
servers,, we run multiple flows over the 3640's around 90Mbps the CPU crumbles.
god help you with Gig. I recommend a minimum of a 7206VXR for Gig. On those,
i run 25% CPU @ 100Mbps, with CEF, and NSE-1 or NPE-400)

JW <j...@e.net> wrote in message news:<3C7656CF...@e.net>...

[Piotr Marecki]

> the 3640 can barely handle 90Mbps (80% to 90% CPU) with CEF over fast
ethernet
> on same interface, multiple interfaces, and at any packet size (i tested
them a
> all here)
>
> My 3640 are between to subnets with powerful switches (6509's) with big
> servers,, we run multiple flows over the 3640's around 90Mbps the CPU
crumbles.
> god help you with Gig. I recommend a minimum of a 7206VXR for Gig. On
those,
> i run 25% CPU @ 100Mbps, with CEF, and NSE-1 or NPE-400)
>

Not to mention simple m5 which can handle much more traffic that 7206 will
ever do :)

pm

[Walter Roberson]

In article <3C7656CF...@e.net>, JW <j...@e.net> wrote:
:I could have sworn that a couple of weeks ago on the web I found a

:gigabit ethernet module for the 3640 router. Now I can't seem to find it
:and it appears that the 3640 doesn't support gigabit. Is this correct?

Not -exactly-. If you put an etherchannel module on the 3640, you'll
find that it has a single gigabit interface. On the other hand,
if you look at the packet forwarding specs for the 3640, you will find
that it cannot keep up to gigabit speeds (full duplex gigabit is
out of the question on the 3620/3640.)

:If the 3640 doesn't support gigabit what is the least expensive router

:that does? Looking through the cisco site the lowest end router I can
:find is the 7000 series.

It depends on your exact needs. If you need BGP or other WAN routing
protocols, then the C2948G-L3 is the lowest-end that supports gigabit.
If this is for LAN use, then the 3650 series comes in a little less
expensive for gigabit.

If you need a generalized modular router then the 7200 series would
seem to be it. I found, though, that it is difficult to puzzle through
all the options for the 7200 series to figure out what the minimal
components would be and what it would cost. It does seem to be a -lot-
more expensive than the C2948G-L3 or the 3650 series.

[Christophe Fillot]

On 22 Feb 2002, Walter Roberson wrote:

> In article <3C7656CF...@e.net>, JW <j...@e.net> wrote:
> :I could have sworn that a couple of weeks ago on the web I found a
> :gigabit ethernet module for the 3640 router. Now I can't seem to find it
> :and it appears that the 3640 doesn't support gigabit. Is this correct?
>
> Not -exactly-. If you put an etherchannel module on the 3640, you'll
> find that it has a single gigabit interface. On the other hand,
> if you look at the packet forwarding specs for the 3640, you will find
> that it cannot keep up to gigabit speeds (full duplex gigabit is
> out of the question on the 3620/3640.)

Hi,

I found those performance indications on Cisco web site at May 2001:

3620 : between 20 and 40 kpps (RISC 80Mhz, backplane 150 Mb/s)
3640 : between 50 and 75 kpps (RISC 100Mhz, backplane 250 Mb/s)
3660 : between 100 and 120 kpps (RISC 225Mhz, backplane 320 Mb/s)

With a backplane of 250 Mb/s, it's clear that a 3640 cannot do
gigabit... ;)

[Walter Roberson]

In article <a565f6$1j0$1...@canopus.cc.umanitoba.ca>,
Walter Roberson <robe...@ibd.nrc.ca> wrote:
:Not -exactly-. If you put an etherchannel module on the 3640, you'll

:find that it has a single gigabit interface.

Correcting myself: it is the EtherSwitch, not etherchannel, and then
you have to add the GE-DCARD-ESW daughtercard.

[M.C. van den Bovenkamp]

Walter Roberson wrote:

> Correcting myself: it is the EtherSwitch, not etherchannel, and then
> you have to add the GE-DCARD-ESW daughtercard.

Well blow me down. I never knew that module existed... But like you
said, it would still run out of layer 3 oomph *way* before the 1Gbps
mark.

Regards,

Marco.