Priscilla,
You can allow a SPAN destination port to receive
data from the connected workstation. The command you
use to enable it is:
set span {src_mod/src_ports | src_vlans | sc0}
{dest_mod/dest_port} [rx | tx | both] [inpkts {enable
| disable}] [learning {enable | disable}] [multicast
{enable | disable}]
[filter vlans...] [create]
The 'inpkts {enable | disable}' is what you're looking
for. It does have a "feature" you should know about
in that it forwards traffic for the port's configured
VLAN as well as what you're monitoring.
See
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_5_3/cofigide/span.htm
for details.
Chris M.
--- Priscilla Oppenheimer <[EMAIL PROTECTED]> wrote:
> The reason I ask is that my client is developing a
> network management box
> that will connect to a SPAN port and collect traffic
> as well as
> occasionally send SNMP queries and other UDP
> packets.
>
> He realizes that if the user were collecting data
> from many ports there
> would be performance issues. However, he wants to
> know, in the absence of
> performance problems, will his device be able to
> send some queries? Is
> sending disabled on the SPAN port? The other answers
> (from people who have
> tried it) make me think the answer is no, sending is
> not disabled.
>
> Priscilla
>
> At 04:46 PM 12/29/00, [EMAIL PROTECTED]
> wrote:
>
>
> >Cisco employees have confirmed for me that devices
> connected to span ports
> >are unable to act as normal hosts by design.
> >
> >
> >
> >
> >
> >
> >Priscilla Oppenheimer
> <[EMAIL PROTECTED]>@groupstudy.com on 12/29/2000
> >03:27:52 PM
> >
> >Please respond to Priscilla Oppenheimer
> <[EMAIL PROTECTED]>
> >
> >Sent by: [EMAIL PROTECTED]
> >
> >To: [EMAIL PROTECTED]
> >cc: (bcc: Kevin Cullimore)
> >Subject: can SPAN port transmit?
> >
> >
> >Hi folks,
> >
> >If I connect a Sniffer-like device to the SPAN port
> of a switch, will the
> >Sniffer-like device be able to transmit data?
> >
> >My guess is no. From my reading on Cisco's
> SwitchProbe external hardware
> >probes, it appears that the SwitchProbe needs an
> additional port to send
> >data to a network management system. One port
> connects to a SPAN port on
> >the switch and the other port connects to a normal
> port and is configured
> >in "management mode."
> >
> >But, does anyone have experience with trying to
> send from a device
> >connected to a SPAN port?
> >
> >Thanks
> >
> >Priscilla
>
>
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
> _________________________________
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