Understanding IPCP and IPv6CP Negotiations for IPv4 and IPv6 Clients Based on RADIUS-Returned Attributes

Point-to-Point Protocol (PPP) uses Internet Protocol Control Protocol (IPCP) and Internet Protocol version 6 Control Protocol (IPv6CP) negotiations for assigning IP version 4 (IPv4) and IP version 6 (IPv6) addresses to authenticated PPP Broadband Remote Access Server (B-RAS) subscribers by using RADIUS-returned attributes or the local address pool configured on the router.

You can now enable IPCP and IPv6CP negotiations for IPv4 and IPv6 clients based only on the RADIUS attributes present in the Access-Accept message returned from the RADIUS server.

IPCP negotiation is initiated for IPv4 clients only when the Framed-Ip-Address [8] attribute or Framed-Pool [88] attribute is returned from the RADIUS server. IPv6CP negotiation is initiated for IPv6 clients only when the Framed-Interface-Id [96] attribute, IPv6 prefix attributes, or IPv6 pool name attributes are returned from the RADIUS server.

You can issue the aaa radius-override-ncp-negotiation command with the enable keyword to enable IPCP and IPv6CP negotiations based on RADIUS-returned attributes.

Note: You can enable IPCP and IPv6CP negotiations based on RADIUS-returned attributes only for Point-to-Point Protocol (PPP) Broadband Remote Access Server (B-RAS) subscribers.

When you enable IPCP and IPv6CP negotiations based on RADIUS-returned attributes, IPCP negotiation is initiated for IPv4 clients only if one of the following conditions is satisfied:

When you enable IPCP and IPv6CP negotiations based on RADIUS-returned attributes, IPv6CP negotiation is initiated for IPv6 clients only if one of the following conditions is satisfied:

You can issue the aaa radius-override-ncp-negotiation command with the disable keyword or the no aaa radius-override-ncp-negotiation command to enable IPCP and IPv6CP negotiations based on RADIUS-returned attributes and configurations done on the subscriber domain map, which is the default behavior of the router.

When IPCP and IPv6CP negotiations are based on RADIUS-returned attributes and configurations done on the subscriber domain map, IPCP negotiation is initiated for IPv4 clients only if one of the following conditions is satisfied:

When IPCP and IPv6CP negotiations are based on RADIUS-returned attributes and configurations done on the subscriber domain map, IPv6CP negotiation is initiated for IPv6 clients only if one of the following conditions is satisfied:

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