topic Re: SPAN port on Dell N2048P in General Topics

SPAN port on Dell N2048P

Alex_Samad — Thu, 29 Jun 2017 02:52:01 GMT

Got a PA-850, wanted to install a TAP port into the DELL N2048P, but it doesn't have capability to do a SPAN port.

Any suggestions on how to deal with that.

I do have the PA as DGW for all the networks, more worried about looking at PC to PC - same vlan

Re: SPAN port on Dell N2048P

acc6d0b3610eec313831f7900fdbd235 — Thu, 29 Jun 2017 03:24:45 GMT

I am not a Dell Switch specialist by any means, but according to this documentation, Port Mirroring is supported on your switch model. http://nbc.intersmart.com.br/PDF/Dell_Switch_N2000_N3000_N4000_Manual.pdf

Because you interested in the PC-to-PC traffic on a specific VLAN a VWire will not do the trick. If you were interested in the traffic traverssing the perimeter firewall to and from the Internet then a VWire would definitely work as well. But you have L3 since the PA-850 is your Default-Gateway, so it not the best option.

Re: SPAN port on Dell N2048P

Alex_Samad — Thu, 29 Jun 2017 03:28:16 GMT

Yes thats port mirroring ... 1 port to another .. not a span port !

Rather dissapointed with the Dell switches.

Re: SPAN port on Dell N2048P

acc6d0b3610eec313831f7900fdbd235 — Thu, 29 Jun 2017 03:34:30 GMT

Just to clarify,

Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. ... Port mirroring on a Cisco Systems switch is generally referred to as Switched Port Analyzer (SPAN) or Remote Switched Port Analyzer (RSPAN).

From a Palo Alto perspective it does not make any difference as long as a copy of the traffic is being forwarded to the port where the PA is connected and listening.

Re: SPAN port on Dell N2048P

Alex_Samad — Thu, 29 Jun 2017 04:02:43 GMT

From my understanding and from trying to configure it.

Its basically mirroring 1 port to another ... So I could target one pc and thats it 🙂

Alex

Re: SPAN port on Dell N2048P

acc6d0b3610eec313831f7900fdbd235 — Thu, 29 Jun 2017 04:15:19 GMT

In this case you are sourcing traffic from a VLAN and not a specific port. In other words, you will be mirroing i.e all traffic from VLAN100 and directing that to the port where the Palo Alto TAP port is connected.

Here is an example:

Source VLAN 100
Palo Alto TAP Port connected to Dell Switch Port: te 0/2

Commands to configure the Port Mirroring:

configure

interface te 0/2

no switchport

no ip address

no shutdown

exit

monitor session 0

source te 0/1 destination te 0/2 direction both

One thing I am not sure on the Dell switches is if you are able to source the traffic from a VLAN instead of a physical interface. If sourcing from a VLAN is not possible, I read that you can specify multiple source ports, so in this case you would have to place multiple statements in the monitor session 0 command.

Again, I am not a Dell switch specialist, so, I am just trying to understand the logic, but it does not seem to be any different than a Cisco switch.

http://www.dell.com/support/article/ca/en/cachn1/HOW10532/how-to-configure-port-monitoring---mirroring-on-dell-networking-force10-switches?lang=EN

I hope this helps.

Re: SPAN port on Dell N2048P

Alex_Samad — Thu, 29 Jun 2017 04:27:14 GMT

Thanks I have tried added in all the active port, lets see how that goes.

Can't remember why I didn't do this before.