Home-4215-3725 no link

Good day everyone! I read all the guides from cisco, but I can't understand why I encounter the following problem:

1. I have'got 4215 in inline mode

2 Windows host with 10.0.3.1/24,10.0.3.254 (ip\mask, gateway) is on the fa0/1 interface and Cisco 3725 is on the port of fa1/0 of the sensor.

3. I have the following configuration on the Cisco 3725 interface:

!

interface FastEthernet2/12

switchport access vlan 23

!

interface Vlan23

IP 10.0.3.254 255.255.255.0

IP access-group out IDS_vlan23_out_1

IP nat inside

IP virtual-reassembly

!

4. the sensor has the following configuration:

----

Inline-interfaces pair-0

No description

Interface1 FastEthernet0/1

Interface2 FastEthernet1/0

----

service-analysis engine

vs0 virtual sensor

logical interface pair-0

------

5. If I have 'package display FastEthernet0/1' of ' display of packets FastEthernet1/0 "on the sensor, I see the same thing:". "

Cisco 3725 OSPF Hellos traffic:

-------------------------------

root of 18:57:32.329981 d 802.1 8000.00:0 b config: 46:fc:95:50.805 d 8000.00:0 b: 46:fc:95:50 pathcost age 0 0 20 max Hello fdelay 2 15

--------------------------------

BUT! The problem is that I do not have a physical link on my Windows host on the network (the Red Cross on the network connection icon on the lower right side of the toolbar)

Can someone please give me a tip that I did wrong?

Thanks in advance!

What type of cable you use to connect to the host with the sensor?

You are using a crossover cable?

Ports 10/100, a crossover cable is required for the connection of 2 guests.

When you plan the wiring, remember that the IDS-4215 acts as a host to end (like routers) instead of a switch or a hub.

Normally the switch or hub is the crossover inside a straight through cable is used when connecting a host to a switch or hub. BUT when connecting a host to a host (or sensor or router) the cross on must be on the outside using a cross over cable.

If you already use a crossover cable, the next thing to determine is if there is a problem with the speed and duplex negotiation.

You could try hard coding the host and the sensor to use 100 Mbps Full Duplex. BU hardcode both sides, you won't have to worry about auto-negotiation.

NOTE: If you use the 10/100/1000 on the host and the sensor interfaces you probably could use a straight cable. When neogiating 1 Gbit/s, network cards can detect the difference between a straight line through and cross over cable and adjust to use types in most cases.

BUT most of the 10/100 interfaces generally do not have this capacity and require a cross on the cable when connecting from host to host.

Tags: Cisco Security

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