![Ip helper address](https://kumkoniak.com/93.jpg)
Now I am able to profile the client.īut I fail to implement the Enforcement Policy. I´ve added ClearPass-Mgmt-IP to the IP helper address on the VLAN on the LAN switch. What are the values needed for VLAN IP and VLAN Mask? Helper address should be the ClearPass Data Port IP!? VLAN should be the VLAN in which the clients are put in for profiling, correct?
![ip helper address ip helper address](https://i.ytimg.com/vi/-QFtCuJHGcY/maxresdefault.jpg)
Am I correct, that I have to configure a new DHCP scope for Centralized DHCP Scope for 元 clients? If yes, im not sure which values are needed? The goal is to configure the IP helper address on the virtual controller. The DHCP service is running on our Barracuda Firewall. They´re placed in a VLAN where the Profiling should take place. We have several IAPs with a virtual controller. I suggest adding IP helper on the VLAN interfaces of the LAN switch.Īny opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba. The DHCP Centralised/distributed 元/L2 are generally used in context of IAP-VPN. In regarding of the "ip helper-address global" itself, the behavior is same as above explanation, though how the relay forwards the DHCP OFFER back to its LAN may vary on devices.Subject: How to configure IP Helper Address on IAP for Profiling in ClearPass On our VRF lite kinda 4500X the route leaking is not required. It additionally requires the ASR920 to do BGP export map kinda route leaking. PS: My test was on Cisco ASR920 with inter-AS BGP option B type VPN. (you may not be able to ping each other, but it is fine if the packet can hit the switch).
![ip helper address ip helper address](https://2.bp.blogspot.com/-MU4ervlxfJY/T8mQcq_05LI/AAAAAAAABYE/9qDrMqL0IDk/s400/IP+Helper+Address.jpg)
It does not require real communication from the VPN and the DHCP server. In my test once the DHCP offer packets arrived on the switch who relays the request, it is all good then.
![ip helper address ip helper address](http://www.twncommunications.net/Other/DHCPTrouble.jpg)
You can do redistribute a static host route into your IGP to achieve that.ĥ. From step 3 we understand the DHCP server need to reach the SVI 200 IP in regarding of routing. It then OFFER the request as unicast, with DESTINATION IP set as the relay IP address (SVI 200 IP).Ĥ. from step because it is unicast happening in global routing space, no vrf/vpn/tag is required, purely unicast, the DHCP server should be able to get it as normal DHCP request. There are some features you may change this relay IP address but I haven't tested it.ģ. It sends a unicast DHCP request to DHCP server with the closest interface IP, and with DHCP relay IP address as VLAN 200 SVI IP. The switch now check the "global" routing table to find the closest interface IP towards the DHCP server.
![ip helper address ip helper address](https://etc.engineering.uiowa.edu/sites/etc.engineering.uiowa.edu/files/wysiwyg_uploads/ip-config(1)_0.png)
As the ip helper address is configured here, the switch knows it is going to relay this DISCOVER packet to the server.Ģ. client DHCP DISCOVER in the vrf VLAN and the the SVI 200 get it. It is a handy feature and it works in this way:ġ.
![Ip helper address](https://kumkoniak.com/93.jpg)