IDSM2 in inline mode

Hi all

There are 2 VLANS configured in the switch of 7600 namely 200 and 300. In order to make the switch to pass these traffic vlan by JOINT (IPS inline mode), the following was configured.intrusion - detection module 2 ports data 1 trunk allowed - vlan 200 300. Apart from that, are there any requirements for the same thing. The IOS in the 7600 switch is 12.2 (18) SXF4.

Thanking you

Anantha Subramanian Natarajan

You can have up to 255 pairs of vlan on Gig0/7 (date-port 1) and a 255 vlan pairs on concert 0/8 (data-port 2).

But be aware that with version 5.0/5.1 on JOINT 2 JOINT-2 will deal with all these pairs as if they were on the same network. This can lead to confusion on the sensor if the packets are routed and run through 2 or more pairs of vlan inline.

So if you are going to deploy in situations where routing could cause packets go through more than one pair of vlan inline then I recommend you to run the IPS version 6.0.

IPS 6.0 can support up to 4 virtual devices. You can have a different configuration of the peg and filter in each virtual sensor.

If a single deployment of 4 pairs of vlan online you can place a pair of vlan inline in each of the 4 virtual sensors.

If you deployed more than 4 virtual probe, there was also an additional feature added to IPS 6.0 help manipulate it.

http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/csids/csids13/cliguide/clianeng.htm#wp1038004

You must set the Session TCP tracking Mode "Vlan only" or "Interface and Vlan" and say this track JOINT-2 the TCP Sessions only by pair of vlan inline and avoid the problem with 5.0/5.1.

Pair Interface InLine mode is very similar to the pair of Vlan InLine. It will pair 2 VLANS.

The difference is in how to obtain VLAN paired.

Mode Inline Interface pair you would 0/7 and 8/0 (data port 1 and 2) to access the ports. Each port would be for just a single vlan. Place you 0/7 on a vlan of the pair and place of 0/8 on the second VLAN of the pair. The JOINT-2 would then monitor the traffic between the 2 VLAN just as it does InLine Vlan pair mode. But instead of passed back and forth on 2 VLAN of a single trunk port, they went back between the 2 access ports.

Since it's access ports, you are limited to only one set of VLANS when you InLine Interface pair mode. While InLine Vlan pair gives you up to 510 vlan pairs.

So I do not recommend using InLine Interface on JOINT-2 pair Mode.

FYI: even if it has an advantage when running on a device. And the device can connect between 2 switches (a JOINT-2 can not because it is inside the switch). In this respect between the 2 switches trunk can carry 4094 VLANS. So place a device pair InLine INterface mode between 2 switches in a trunk port has some advantages.

Tags: Cisco Security

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    Am I wrong?

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