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Can anyone shed some light on this issue.

When i enable monitor session the destination port disables

monitor session 1 source interface FastEthernet1/0/1
monitor session 1 destination interface FastEthernet1/0/15

Both are in the default same VLan
this is the output of sho monitor

Type : Local Session
Source Ports :
Both : Fa1/0/1
Destination Ports : Fa1/0/15
Encapsulation : Native
Ingress : Disabled

Switch is a 3750 running ios Version 12.2(25r)SEB

TL

TL wrote:
> Can anyone shed some light on this issue.
> When i enable monitor session the destination port disables

That is by design.

> monitor session 1 source interface FastEthernet1/0/1
> monitor session 1 destination interface FastEthernet1/0/15
>
> Both are in the default same VLan
> this is the output of sho monitor
>
> Type : Local Session
> Source Ports :
> Both : Fa1/0/1
> Destination Ports : Fa1/0/15
> Encapsulation : Native
> Ingress : Disabled
>
> Switch is a 3750 running ios Version 12.2(25r)SEB

By design, the destination port will not accept any traffic. i.e. you
can't use your your sniffer port to access your sniffer.

--

hsb


"Somehow I imagined this experience would be more rewarding" Calvin
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It's the correct behaviour.
However, you can 'inject' traffic into the destination port by using the
'ingress' parameter of the monitor command.
Refer to cisco documentation.


"TL" <> wrote in message
news:...
> Can anyone shed some light on this issue.
>
> When i enable monitor session the destination port disables
>
> monitor session 1 source interface FastEthernet1/0/1
> monitor session 1 destination interface FastEthernet1/0/15
>
> Both are in the default same VLan
> this is the output of sho monitor
>
> Type : Local Session
> Source Ports :
> Both : Fa1/0/1
> Destination Ports : Fa1/0/15
> Encapsulation : Native
> Ingress : Disabled
>
> Switch is a 3750 running ios Version 12.2(25r)SEB
>
> TL

Cen wrote:

> It's the correct behaviour.
> However, you can 'inject' traffic into the destination port by using
> the 'ingress' parameter of the monitor command. Refer to cisco
> documentation.


only on some platforms. I believe for the 3750's it is not possible.


--

hsb


"Somehow I imagined this experience would be more rewarding" Calvin
**************************ROT13 MY ADDRESS*************************
Due to the volume of email that I receive, I may not be able to
reply to emails sent to my account. Please post a followup instead.
************************************************** ******************

>>> When i enable monitor session the destination port disables
>> using the 'ingress' parameter of the monitor command.
> only on some platforms. I believe for the 3750's it is not possible.

On 4500 I seem to need:

cat4000-i5s-mz.121-20.EW1

1 2 1000BaseX (GBIC) Supervisor(active) WS-X4515
2 48 10/100BaseTX (RJ45)V WS-X4148-RJ45V
3 48 10/100BaseTX (RJ45)V WS-X4148-RJ45V
6 48 10/100BaseTX (RJ45)V WS-X4148-RJ45V


monitor session 1 source interface Fa6/12
monitor session 1 destination interface Fa2/15 ingress vlan 6 learning

My PC works right now.

I do suspect that I have done mon sess and had
normal traffic 3750 but I can't recall for sure.