Solved

question in Port Mirroring

Posted on 2011-03-17
7
529 Views
Last Modified: 2012-05-11
Hi i have two cisco switched 4500 . On switch A i have websense web monitor . On this Switch i have
HOUSWCORE1#sh monitor session 10
Session 10
----------
Type                   : Remote Destination Session
Source RSPAN VLAN : 999
Destination Ports      : Gi1/45


and the web monitoring works fine

On Switch B , i also have a websense. On this switch i see

DALSW0010#sh monitor session 5
Session 5
---------
Type              : Remote Destination Session
Source RSPAN VLAN : 999
Destination Ports : Gi4/1
    Encapsulation : Native
          Ingress : Disabled
         Learning : Disabled

and the web filter doesnt work . How do i enable ingress and learning ?
0
Comment
Question by:c_hockland
  • 3
  • 3
7 Comments
 

Author Comment

by:c_hockland
Comment Utility
actually the issue is that web filter on Switch B is not monitoring anything.
0
 
LVL 18

Accepted Solution

by:
decoleur earned 250 total points
Comment Utility
are you sure that the second switch has the RSPAN VLAN configured on it?

look at http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.1_19_ea1/configuration/guide/swspan.html#wp1200730

The RSPAN VLAN carries SPAN traffic between RSPAN source and destination sessions. It has these special characteristics:

•All traffic in the RSPAN VLAN is always flooded.

•No MAC address learning occurs on the RSPAN VLAN.

•RSPAN VLAN traffic only flows on trunk ports.

•RSPAN VLANs must be configured in VLAN configuration mode by using the remote-span VLAN configuration mode command.

•STP can run on RSPAN VLAN trunks but not on SPAN destination ports.

For VLANs 1 to 1005 that are visible to VLAN Trunking Protocol (VTP), the VLAN ID and its associated RSPAN characteristic are propagated by VTP. If you assign an RSPAN VLAN ID in the extended VLAN range (1006 to 4094), you must manually configure all intermediate switches.

It is normal to have multiple RSPAN VLANs in a network at the same time with each RSPAN VLAN defining a network-wide RSPAN session. That is, multiple RSPAN source sessions anywhere in the network can contribute packets to the RSPAN session. It is also possible to have multiple RSPAN destination sessions throughout the network, monitoring the same RSPAN VLAN and presenting traffic to the user. The RSPAN VLAN ID separates the sessions.

hope this helps,

-t
0
 
LVL 8

Assisted Solution

by:bsohn417
bsohn417 earned 250 total points
Comment Utility
is RSPAN VLAN trunked between these 2 SWs,
could you please post sh run | in moni

sh int trunk
0
Better Security Awareness With Threat Intelligence

See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

 

Author Comment

by:c_hockland
Comment Utility
will do.give a few plz
0
 

Author Comment

by:c_hockland
Comment Utility
DALSW0010#sh run | in moni
monitor session 5 destination interface Gi4/1
monitor session 5 source remote vlan 999
0
 
LVL 18

Expert Comment

by:decoleur
Comment Utility
do a sho int trunk on both switches and show vlan to confirm that the rspan vlan is on both switches.
0
 
LVL 18

Expert Comment

by:decoleur
Comment Utility
the port spanning appears to be fine it is just the local implementation of vlans that needs to be looked at.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
vm nic duplex 1 45
Cisco ACS mixed versions 8 53
GRE Trunnel with IPsec Encryption Issue 3 33
cisco switch stacking 6 29
I have seen some questions on problems with SSH/telnet access to Cisco routers that may occur despite the fact that from a PC connected to your LAN, Internet connectivity is in place and users can access Internet sites without any issues.  There are…
This tutorial will go through the steps required to write a script that will back up the configuration settings of a HP-ProCurve switch. You will need to get the following things to follow this tutorial: Telnet Scripting Tool e.g. TST10.exe …
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now