Hello,

We have an LNS (asr1k), dual-stack CPE and Radius server.
Everything works fine if both ipv4 and ipv6 prefix is assigned to CPE by Radius
If we set Radius server not to assign v6 prefix, we expect to build up an ipv4-only session over ppp.
This is not what happens. PPP negotiation fails with the following debug lines:

IPv6 DHCP_AAA: No authorization data from SSS
Vi2.2364 PPP DISC: Non-PPP hang up

some config parts of LNS:
!
no ipv6 source-route
ipv6 unicast-routing
ipv6 dhcp binding track ppp
ipv6 dhcp pool IPv6_DHCP_POOL
ipv6 dhcp pool POOL_DHCP_PD
ipv6 multicast-routing
ipv6 multicast rpf use-bgp
!
!
interface Virtual-Template99
 mtu 1460
 ip unnumbered Loopback0
 ip tcp adjust-mss 1420
 no logging event link-status
 ipv6 enable
 no ipv6 nd prefix framed-ipv6-prefix
 no ipv6 nd ra suppress
 ipv6 dhcp server POOL_DHCP_PD allow-hint
 peer default ip address pool adslpool_1 adslpool_2
 ppp max-configure 3
 ppp authentication pap AAA_AUTHEN_PPP_noc3x
 ppp authorization AAA_AUTHOR_NET_noc3x
 ppp accounting AAA_ACCT_NET_noc3x
 ppp ipcp address required
 ppp ipcp address accept
 ppp ipcp no-renegotiation send-termreq
 ppp link reorders
 ppp timeout retry 5
 ppp timeout ncp 30
 ppp timeout authentication 30
end

Can anyone help?

Regards,
Antal