Ppp For Ipv4; Ppp For Ipv6 - HP MSR Router Series Wan Access Configuration Manual

MS-CHAP-V2 supports password change. If the peer fails authentication because of an expired
password, it will send the new password entered by the user to the authenticator for
reauthentication.

PPP for IPv4

On IPv4 networks, PPP negotiates the IP address and DNS server address during IPCP negotiation.
IP address negotiation
IP address negotiation enables one end to assign an IP address to the other.
An interface can act as a client or a server during IP address negotiation:
Client—Obtains an IP address from the server. Use the client mode when the device accesses the
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Internet through an ISP.
• Server—Assigns an IP address to the client. Before you configure the IP address of the server, you
must perform one of the following tasks:
Configure a local address pool and associate the pool with the ISP domain.
Specify an IP address or an address pool for the client on the interface.
When IP address negotiation is enabled on a client, the server selects an IP address for the client in the
following sequence:
1. If the AAA server configures an IP address or address pool for the client, the server selects that IP
address or an IP address from the pool. The IP address or address pool is configured on the AAA
server instead of the PPP server. For information about AAA, see Security Configuration Guide.
If an address pool is associated with the ISP domain used during client authentication, the server
2.
selects an IP address from the pool.
3. If an IP address or address pool is specified for the client on the interface of the server, the server
selects that IP address or an IP address from that pool.
DNS server address negotiation
IPCP negotiation can determine the DNS server IP address.
When the device is connected to a host, configure the device as the server to assign the DNS server IP
address to the host.
When the device is connected to an ISP access server, configure the device as the client. Then, the device
can obtain the DNS server IP address from the ISP access server.

PPP for IPv6

On IPv6 networks, PPP negotiates only the IPv6 interface identifier instead of the IPv6 address and IPv6
DNS server address during IPv6CP negotiation.
IPv6 address assignment
PPP cannot negotiate the IPv6 address.
The client can get an IPv6 global unicast address through the following methods:
Method 1—The client obtains an IPv6 prefix in an RA message. The client then generates an IPv6
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global unicast address by combining the IPv6 prefix and the negotiated IPv6 interface identifier.
The IPv6 prefix in the RA message is determined in the following sequence:
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