NAC Appliance + OOB Virtual Gateway Trunking issues

I have the following problem. When I connect the CAS eth0 to a trunk port in the core switch it disconnects from the CAM. When the port is in access mode, the CAM can connect to the CAS. The core switch is a 4500 with IOS 12.2(25)EW. What could be the problem?

Hi prananth,
I managed to resolve the issue. It was a HA issue. I had configured "Link failure detect" on the redundant CAS app. Apparently the CAS couldnt reach the pingable IP causing failover to take place many times between the two boxes causing the CAS not to communicate with the CAM.
Kindly help me with the following problem I am now having:
http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Security&topic=General&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.1ddf45d4/0#selected_message
I will really appreciate. Thank you.

Similar Messages

NAC L3 OOB Virtual Gateway/Real-IP Gateway

In a Central Deployment (NAC server at Central Site) for Remote Office (WAN) users it´s possible to work with L3 OOB
Virtual Gateway? or it´s only possible to work with L3 OOB Real-IP gateway?
If it´s possible both modes (Real-IP o Virtual) which are the advantages/disadvantages of each one?
I didn't found a response for this in the documentation.
Thanks in advance.

Hi, Paul
>>I then disconnect the PC and patch it into the Switch 2. I then authenticate but instead of the port being moved to the correct VLAN it is left in the authentication VLAN and the Web Login cycles and asks me to log in again. Looking at the Online Users display it says I'm online on Switch 1 on the port I have disconnected from. This is INCORRECT!
Have a look at the Switch Management ->Port Profiles and below "Options: Device Connected to Port" (the second one) "Change to .... if the device is certified" there should be Access VLAN option -make it active.

L3 Deployment OOB Virtual Gateway

Hi Faisal,
Good day! I would like to ask about the L3 deployment approach using OOB Virtual Gateway. What I did was enabled the L3 support and applied static routes. When I tried to connect a client workstation I cannot get an ip address. The cisco switch that Im using to the remote site were already discovered in the devices in NAC. When I check the ports it change to authentication vlan 100 but cannot passthrough. The IP block for the site is 10.19.x.x. Do I have to put a managed subnet and vlan mapping? But what I've read from the manual no need to configure the managed subnet instead a static route need to apply.
For the L2 deployment OOB Virtual gateway its working now, the IP block im using is 10.1.x.x. I want add the L3 deployment for the remote sites also for the users to authenticate through the nac. I'm thinking to apply 2 approach for the nac one for L2 deployment for the main site and L3 deployment for the remote site. Faisal, am I doing it correctly? Please let me know what should I apply for it and see attachment. Thanks.
Richard

I have setup windows dhcp server locally in the L3 hops away network. Basically the network from the main site (where the NAC is installed) and the remote site were already connected and talking because of the static route. The remote site has always dhcp server locally where the clients get ip address. Also I created the dhcp scope for the authentication vlan as what I see in the manual though in the example they're using L3 switch. I configured the static route in the cas. What else do need in the configuration?
In the OOB virtual gateway there is no problem using the windows dhcp server but the thing it cannot do L3 hops away it just in the main site. Thats why I change to OOB RIP. Please see the attachment.

NAC/CCA Configuration Verification: OOB + Virtual Gateway (L2)

Hello,
I am currently configuring a NAC deployment based on Out-of-Bound OOB with Virtual gateway. Can someone please verify my configs below:
Core Switch:
VLAN DB:
vlan 10
name VLAN_DEPT1
vlan 11
name VLAN_DEPT2
vlan 20
name VLAN_DEPT3
vlan 26
name VLAN_DEPT4
vlan 27
name VLAN_DEPT5
vlan 28
name VLAN_DEPT6
vlan 29
name VLAN_DEPT7
vlan 30
name VLAN_DEPT8
vlan 32
name VLAN_DEPT9
vlan 50
name VLAN_NetMGT
vlan 51
name VLAN_CAS_MGT
vlan 52
name VLAN_CAM_MGT
vlan 210
name VLAN_DEPT1_Auth
vlan 211
name VLAN_DEPT2_Auth
vlan 220
name VLAN_DEPT3_Auth
vlan 226
name VLAN_DEPT4_Auth
vlan 227
name VLAN_DEPT5_Auth
vlan 228
name VLAN_DEPT6_Auth
vlan 229
name VLAN_DEPT7_Auth
vlan 230
name VLAN_DEPT8_Auth
vlan 232
name VLAN_DEPT9_Auth
Interface Configs
interface GigabitEthernet3/41
description "Link to Cisco CAM-PRI eth0"
switchport access vlan 52
switchport mode access
spanning-tree portfast
spanning-tree guard root
no cdp enable
no ip address
interface GigabitEthernet3/42
description "Link to Cisco CAM-FO eth0"
switchport access vlan 52
switchport mode access
spanning-tree portfast
spanning-tree guard root
no cdp enable
no ip address
interface GigabitEthernet3/43
description "Trunk to Cisco CAS-PRI eth1 / UN-Trusted Network"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 777
switchport mode trunk
switchport trunk allowed vlan 210,211,220,226-230,232
interface GigabitEthernet3/44
description "Trunk to Cisco CAS-FO eth1 / UN-Trusted Network"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 777
switchport mode trunk
switchport trunk allowed vlan 210,211,220,226-230,232
interface GigabitEthernet3/46
description "Trunk to Cisco CAS-PRI eth0 / Trusted Network"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 700
switchport mode trunk
switchport trunk allowed vlan 10,11,20,26-30,32,50-51
interface GigabitEthernet3/48
description "Trunk to Cisco CAS-FO eth0 / Trusted Network"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 700
switchport mode trunk
switchport trunk allowed vlan 10,11,20,26-30,32,50-51
interface GigabitEthernet1/1
description "Trunk link to DEPT1 Access SW"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 700
switchport mode trunk
!------- Example of VLAN Interface --------
interface Vlan10
description "DEPT1 VLAN"
ip address x.x.10.1 255.255.255.0
ip helper-address x.x.50.5
no ip redirects
no ip unreachables
no ip proxy-arp
no ip route-cache
no ip mroute-cache
!------- No VLAN Interface for AUTH VLAN 210 --------
Access Switch Configuration
interface GigabitEthernet0/1
description "Trunk Link to Core Switch"
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 700
switchport mode trunk
no ip address
interface GigabitEthernet0/6
switchport access vlan 30
switchport mode access
spanning-tree portfast
spanning-tree guard root
no cdp enable
no ip address
=========================================
Is the above config correct?
Thanks

Hi,
By bogus I assume you mean something like;
interface Vlan700
description "BIT BUCKET for unused ports"
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
no ip route-cache
no ip mroute-cache
shutdown

NAC layer 3 Virtual Gateway Setup

I am running the NAC Appliance currently in virtual gateway mode for layer 2 inband and it works great. I wanted to add layer 3 virtual gateway inband to this same NAC server, but I can't seem to find enough documentation on this. I do have layer 3 enabled and a static route to the layer 3 network in place. I don't think I understand how to get the network to go through the NAC. Do I need to run the Agent on the layer 3 network or can it still somehow go through just the web page authentication?
Thanks.

Policy route the unauthenticated traffic so it forces the layer 3 network in question through your CAS layer 3 device. Your discovery host address should be on the other side of the clean access server trusted side. Theres a NAC Chalk talk pdf that steps this through for you
Search "NAC Chalktalk"

NAC Problem_In-Band Virtual Gateway deployment

we deployed In-Band virtual gateway deployment..
the users connected to untrusted Vlan and took IP address from DHCP where it configured on ASA that is connected to trusted interface but no one can reach to the gateway " IP address of the firewall" and when we open any browser not redirect to web login page and we don't have local DNS and we use global DNS..
Note: we used HP switches..
Please support me ASAP..
BR,
Saad Eid

I have not found any either. You can use the one for VPN since it will be the same.
http://www.cisco.com/en/US/products/ps6128/products_configuration_example09186a008074d641.shtml

NAC Appliance OOB L3

Hi everyone,
"i have a friend" ( :-) )to which i want to deploy the NAC OOB L3.
Why this one? Because he has a central location and a few branches (a few more actually) and these branches are at 2 L3 hops prom the center. More specific, there is a L3 switch as a gateway to the branch LAN users and after that, a router that connects to the center (GRE/IPSec).
The question is, and i did not manage to find or to realise by myself: it is mandatory to use a DHCP server for allocating ip-s to clients? (for all of their states: unauthenticated, authenticated, permited etc).
If not how it should be done?
Second: if is mandatory, should it work only with a centraly deployed DHCP server, or i can use the L3 switch in every branch as a dhcp server?
Thank you for your patiance.

DHCP is required for L3 OOB real-ip gateway since the system will need to get a new address when it is switch to the authorization VLAN and then again after the posture process when it is switched back to its "normal" VLAN.
As for the DHCP server, you can use either a central server, have a local switch provide the addresses or a combination of both.
In our install, the local switch is the DHCP server for the auth VLAN and a local server is used for the access VLAN.
Mike

NAC applianc OOB dns problem

Hello friends, anybody can help me ?
i have 1 CAS OOB, 3560 and 1 CAM. I have configured vlans, dhcp, etc. when the client are in the auth vlan, he own an ip from the trusted vlan with the vlan mapping configuration, buuuuuuuutttt dns doesn'w work. client web browser doesn't redirect. i can access the login page only writing the cas ip address in hte browser.
i am lost, thanks.

Make sure the ip address of the CAS is mapped to its name in the DNS server so that redirection takes place.

Cisco Clean Access OOB with virtual gateway

I have set the clean access OOB virtual gateway mode, i put managed subnet one of unused ip with unauthenticated vlan,some of the pc running with dhcp so i put ip refresh after successful authentication (this working fine), but some of them running with static so i cannot refresh the ip address,
after authentication through clean access clean access manager changing Unautheticated vlan(44) authenticated vlan (4), but i can't access internet and any other application through network (even with static ip and dhcp (if i put refresh dhcp ip i can) ), in pc arp cache i can see the orginal gateway mac address if i clear the arp cache with arp -d command the moment it start working how can solve this issue please help me guys
thank you

This document describes how to configure the syslog settings in order to log the events to an external server in the Cisco Network Admission Control (NAC) Appliance, formerly known as Cisco Clean Access (CA).
http://www.cisco.com/en/US/products/ps6128/products_tech_note09186a008085d6e9.shtml

NAC - L3 OOB

Hi all,
We would like to authenticate users L3 adjacent to the NAC appliance server. The NAC is setup as OOB virtual gateway.
Is that possible, what should be the configuration ?

I defaulted the 3550 switch in the WAN and reconfigured it and it works now. I tried the same procedure for the 2950 switch but no dice. I replaced the 2950 switch with a 3550 that worked.
Can anyone say if there is an issue with teh 2950 switch for L3 OOB? I don't have another 2950 switch to test with.
Sachin

NAC appliance local authentication not working

Hi,
i am trying a test scenario for NAC. it is oob virtual gateway
I get the login page when i try to access the web but when i try to authenticate to the local db i don;t receive an error message and i remain on the authentication screen.
I listened with tcpdump on both interfaces. on the untrusted side i see traffic but on the trusted side no diffrence in traffic appears(but maybe this is normal)
can someone please help with the detailed steps the authentication follows
not just host->nas->nam(localdb)
or some ideas
Thank you!

I doubt this will help, but here goes. I seem to remember a similar issue here, and I went into my browser's proxy settings and turned them off. Then I could authenticate, but not browse the web. So after authenticating I turned them back on and it was fine. There is a tab on the NAC Device Management > Clean Access Servers > >Advanced> Proxy where you can tell clean access about a proxy server, but I don't know if that's relevant.
I assume you have verified that your local user ID works by testing the auth server with it and that it has a profile that allows you to go someplace.

NAC Appliance for Wirelles In-Band Virtual Gateway

Hi, People.
Does anybody know as configuring NAC Appliance for Wirelles In-Band Virtual Gateway.
Tks.

Hi Wemerson,
Basic Wireless or Wired InBand is basically the same thing regarding the NAC configuration.
Please follow the chalk-talks available online: http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5707/ps8418/ps6128/prod_presentation0900aecd80549168.html.
Notes:
- In Inband all traffic MUST flow through the CAS, which means that al the traffic on the VLAN of the wireless client MUST flow through the CAS. This can be done via L2 mechanisms (VLAN restrictions) or L3 (routing).
- For the CAS, it is transparent if the client traffic comes from a wireless client or wired client.
- If you want to use wireless sso, you can configure the WLC the same way as a VPN concentrator. the Wlc will then send RADIUS Accounting information to the CAS and the CAS can allow clients to access resouces if they have already been authenticated by the WLC.
HTH,
Tiago
If this helps you and/or answers your question please mark the question as "answered" and/or rate it, so other users can easily find it.

NAC OOB VIRTUAL GW PROBLEM

Hi,
I am trying to setup a NAC OOB Virtual GW Scenario (attached is the visio schematic of the setup):
Switch: 3550 (ios 12.2(46) adv ip serv)
NAC 4130 appliances: v4.1.6 (also tried v4.5)
Switch Configuration of the trunks to the CAS):
- int f0/23 (connected to CAS e0) -> dot1q trunk with native vlan 999 and allowed vlans 199 (mgt vlan of cas) and 10 (hosts access vlan)
- int f0/21 (connected ro CAS e1) -> dot1q trunk with native vlan 998 and allowed vlans 100 (hosts authentication vlan)
- SVIs on switch: 199, 10, 200 (CAM mgt vlan), 99 (dns, dhcp)
The problem I am facing is that the host once connected to a managed port is able to acquire an ip from the access vlan from the dhcp server but is not redirected to the login page. I tried to follow some hints provided in previous posts but none of them worked for me. I configured the following:
- Login Page
- Configured IP based traffic control on the unautheticated role to permit all traffic (also host based to permit https://192.168.199.1 -> cas' ip with trusted dns my dns server 192.168.99.1)
- Managed subnet with unused ip in access vlan (192.168.10.253) and vlan id that of the auth vlan (100)
- vlan mapping between untrusted vlan 100 and trusted vlan 10
- tried to access a resolvable website by my dns from the host (as per the suggestion from a previous post for someone who was facing the same prob)
- also tried to access the cas' login page from the host with vain, eventhough it is accessible from trusted subnets
Note: I followed the configuration guide of both v4.1.6 and v4.5 and with both versions I was facing the same problem.
I would be very thankful for any hints to help me solve this issue.
Questions: When the host is connected to a managed host (assigned to the managed vlan 100) and it is assigned an ip from the a access vlan 10. Shouldn't I be able to access the managed subnet case I configured ip traffic control policy to permit all traffic from untrusted to trusted? also shouldn't I be able to resolve website's ip with "nslookup x.com" since dns traffic is by default configured and also trusted dns server 192.168.99.1 is configured?
Thanks in advance for any help.

It arised to be that the 3550/3560/3750 are not supported for Central Deployment. The problem is solved.
Cisco Catalyst 3550/3560/3750 and NAC Appliance In-Band Central Deployment
For Cisco Clean Access (NAC Appliance) in In-Band Central Deployment mode, when a Cisco Catalyst 3560/3750 series switch is used as a Layer 3 switch and if both ports of the Clean Access Server (CAS) are connected to the same 3560/3750 switch, the minimum switch IOS code required is Cisco IOS release 12.2(25)SEE.
Because caveat CSCdu27506 is not fixed on the Catalyst 3550 series switch, when the Catalyst 3550 is used as a Layer 3 switch, it cannot be used in NAC Appliance In-Band Central Deployment.
For further details, refer to switch IOS caveat CSCdu27506:
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCdu27506
See also Switch Support for CAS Virtual Gateway/VLAN Mapping (IB and OOB).
Switch Support for CAS Virtual Gateway/VLAN Mapping (IB and OOB)
Table 6 describes Cisco Catalyst switch model support for the Virtual Gateway VLAN Mapping feature of the Clean Access Server for either in-band (IB) or out-of-band deployments (OOB). This table is intended to clarify CAS network deployment options when connecting the CAS in Virtual Gateway (bridge) mode to the switches listed.
Table 6 Switch Support for CAS Virtual Gateway In-Band/OOB VLAN Mapping Feature
Cisco Catalyst Switch Model Virtual Gateway
Central Deployment
(both interfaces into same switch) Edge Deployment
(each interface into different switch)
6000/6500 Yes Yes
4000/4500 Yes Yes
3750/3560 (L3 switch) Yes with 12.2(25) SEE and higher 1
Yes
3550 (L3 switch) No 1
Yes
3750/3560 (L2 switch) Yes Yes
3550 (L2 switch) Yes Yes
2950/2960 Yes Yes
2900XL No 2
Yes
3500XL Yes Yes
28xx NME Yes with 12.2(25) SEE and higher 1
Yes
1 Due to switch caveat CSCdu27506. See Cisco Catalyst 3550/3560/3750 and NAC Appliance In-Band Central Deployment for details.
2 2900 XL does not support removing VLAN 1 from switch trunks.

NAC - OOB - Virtual IP - users lost connecti

Hi.
So my problem is the follow:
I have i my customer a NAC OOB - Virtual Ip Gateway.
So, we have a many port profiles. Each Port profile witch its own authentication vlan and access vlan, for example:
TI - auth vlan 585 - access vlan 85
ENGINEERING - auth vlan 586 - access vlan 86
And works very very fine.
BUT
There is a common location called PLATFORM (auth vlan 587, access vlan 87) where, to put port profile on each User interface on the switch after 20 minutes or less, the machines that are on this profile (VLANs 587, 87) lose network connectivity, without bounce.
I checked and, some machines for no reason, are changed to vlan authentication without snmp Linkdown and even get stuck in with User certifield device list.
Other machines remain in vlan access, but lose all connectivity to the network without ping gateway and any other device.
Another vlan (for ex: vlan 1) that is not controlled by NAC continues to communicate normally.
I tried to see any logs on the switch but could not see anything abnormal (yet).
Other locations with others port profiles work normally.
The uplinks on this switches and interfaces users dont have any CRC or errors.
Could anyone help me? This is causing problems in my account.

Hi,
I understand then that the clients are not connecting through local or SSO mode, is that correct?
I would suggest 3 things so far:
1. Check the logs on the switches where the CAS's are connected, I had a similar problem where CAS would stop responding and the switches would complain about vlan mismatch or mac flapping, if you notice errors on the switches verify that you have:
* Vlan mapping enabled correctly
* Different native VLAN on the switch interface for trusted and untrusted CAS ethx.
* The correct vlans configured on each port: for untrusted just the authentication (layer 2) vlans, for trusted interface the access vlan (20) and the management vlan.
2. Enable the management vlan tag on the trusted interface of the CAS and use your CAS management vlan.
3. On the CAM go to the Clean access server section, manage one of your CAS's, the first window will show the services currently running on the CAS, verify if the SSO service is running, if it's not running, verify the configuration. If it's not allowing you to enable it, verify the time settings on your devices, the AD user and all the other settings needed for this to work.
Hope this helps,
Regards,

NAC - virtual gateway vs. real gateway

Hi All,
I don't have too much experience with NAC deployment. I want to go with L3 (because we have central site), OOB (for LAN) and IB (for wireless and VPN). but I don't know whether I should go with real gateway or virtual gateway. I know virtual gateway is easier than real gateway. but technically, which way is more popular and provide better security measures?
any suggestion would be very appreciated.
thanks
Alex

If your remote subnets are multiple hops away, RIP would be the option you should use. They both are equally popular, but for L3 subnets which are remote, RIP is the most often used design

NAC Appliance + OOB Virtual Gateway Trunking issues

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