I use a 2900XL with many span ports. I use one of them for an Internet
monitoring software. It has the ability to monitor at 100Mbps full duplex
and transmitt on that same port. I have a Sniffer Pro DSS and I am able to
transmitt data on that span port also.
Neil
"Priscilla Oppenheimer" <[EMAI
: Lou Nelson; [EMAIL PROTECTED]; [EMAIL PROTECTED];
Priscilla Oppenheimer
Cc: Bryant Andrews
Subject: Re: can SPAN port transmit?
See Inline.
- Original Message -
From: Lou Nelson <[EMAIL PROTECTED]>
To: Nigel Taylor <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
: Lou Nelson; [EMAIL PROTECTED]; [EMAIL PROTECTED];
Priscilla Oppenheimer
Cc: Bryant Andrews
Subject: Re: can SPAN port transmit?
See Inline.
- Original Message -
From: Lou Nelson <[EMAIL PROTECTED]>
To: Nigel Taylor <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
s <[EMAIL PROTECTED]>
Sent: Saturday, December 30, 2000 3:13 AM
Subject: RE: can SPAN port transmit?
> hmmm.
> I fully understand the Lane ATM Vlan Elan relationships.
> What is happening is that I only see the broadcast on the specific Vlan.
I
> do not see the direct Vlan to Vlan
on
Cc: Bryant Andrews
Subject: Re: can SPAN port transmit?
Lou,
The answer is yes. I must be more specific in stating that since
LANE extends layer 2 characteristics through the ATM cloud. ELANs are
simply a way of extending a VLAN(lan segment/broadcast domain).
So plugging a sniffer onto a
mer <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Saturday, December 30, 2000 12:02 AM
Subject: RE: can SPAN port transmit?
> The answer is no. I have tried before and I now think of spanning a port
as
> a 6th state of the STP... Listen only to the oth
, 2000 4:42 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: can SPAN port transmit?
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
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
{ena
---
To: [EMAIL PROTECTED]
cc:
From: Kevin Cullimore/FIRNY/NorthAmerica/MCKINSEY
Date: 12/29/2000 09:40:22 PM
Subject: (Document link: Kevin Cullimore) Re: can SPAN port transmit?
My admittedly limited experience is as follows:
on the first day after a
Sent by: [EMAIL PROTECTED]
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
cc:
Subject: Re: can SPAN port transmit?
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
interface FastEthernet0/13
port monitor FastEthernet0/22
See above. I just tried a little experiment and it seems to work on a Catalyst 2924XL.
With a PC plugged into FA0/13 and a Solaris server plugged into FA0/22 I was able to
see
all traffic to the Solaris box from a software sniffer on the P
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. H
Yeah, you're correct. A second port is needed for the probe to send
data to a network management system. I have tried this a few times
using Sniffer Pro. You cannot put data on the network over the SPAN
port, it is only intended for listening to the configured ports.
-j
Priscilla Oppenheim
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 PROTECTE
On a cat 6509 I setup my port to span a vlan with not much traffic and I can
surf and send/receive email without any noticeable difficulty. I've done
this a couple of time before and it seems to work okay. I have seen it done
on a unix system running tcpdump and it was able to surf, I have used
Hi Priscilla, Hi Group,
I used the SPAN functionality often on remote sites with Catalyst 2924XL
and Catalyst 6000 switches. As sniffer device i used a unix workstation
on the remote network that was able to run a basic protocol analyzer
(tcpdump, snoop). I setup and operated SPAN functionality
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