ASR9k-BNG as proxy DHCP and DHCP serveur in different vrf with ABF between vrf having problem
BNG is configured as DHCP proxy and a lot of DHCP discover and DHCP offer are exchanged between the DHCP server and the proxy before the client is able to have set the correct IP. This could take a variable time from few minutes to 20 minutes.
I have the feeling that the BNG behaviour or routing is the problem.
-two ASR 9001 in cluster with version 4.3.2
-default global vrf for public IP addresses with access to internet with the bundle interface BE1.1103 as interface for the IPoE clients
-interface BE1.1099 in vrf <Ftth> where the different servers are located in to provide radius and dhcp services
-BNG is used to provide HighSpeedInternet (HSI) IP addresses to the clients (interface router on a fiber-modem)
-ABF on both interfaces BE1.1103 and BE1.1099 to permit to route some IPs between the global and the Ftth vrf
-radius server in the BE1.1099 that allow the client to receive an IP through the DHCP proxy on the BNG
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