R3303-HP HSR6800 Routers Layer 2 - WAN Configuration Guide

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Ste
p
Command Remarks
4. Enable the local end to
accept the DNS server
address assigned by the peer.
ppp ipcp dns admit-any
Optional.
By default, a device does not
accept the DNS server address
assigned by the peer.
NOTE:
The server will specify a DNS server address for a client in PPP negotiation only after the client is
configured with the ppp ipcp dns request command. For some special devices to forcibly specify DNS
server addresses for clients that dot not initiate requests, you must configure the ppp ipcp dns admit-any
command on these devices.
2. Configuring the local end as the server
To configure settings for DNS server address negotiation when the device is functioning as the
server in PPP negotiation:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the local end to assign
a DNS server address to the
peer.
ppp ipcp dns primary-dns-address
[ secondary-dns-address ]
By default, a device does not
assign a DNS server address to the
peer.
The server specifies a DNS server
address for a client only after
receiving a request from the client.
Enabling PPP link quality control
When the router has a FIP-210, FIP-240, FIP-300, or FIP-310 installed with a HIM-CL1P/HIM-CL2P
interface module with CPOS interfaces operating in E1 mode.
PPP link quality control (LQC) monitors the quality (packet loss ratio and packet error ratio) of PPP links
(excluding those in MP bundles) in real time.
If PPP LQC is not enabled, each end of a PPP link periodically sends keepalive packets to its peer. If PPP
LQC is enabled, Link Quality Reports (LQRs) packets replace keepalive packets to monitor the link.
The system uses received LQR packets to measure the link quality. If two consecutive measured results are
below the close-percentage, the system shuts down the link. Then the system measures the link quality at
an interval that is ten times the LQR interval. If three consecutive measured results are higher than the PPP
LQC resume-percentage, the system brings up the link.
A shut-down link must experience at least 30 keepalive intervals before it can go up again. If you set a
large keepalive interval, the link will take a long time to come up.
This feature is available only on CPOS interfaces in E1 mode.
This feature is available on MP links only in software MP mode.
If you enable LQC on both sides of a PPP or MP link, make sure both sides have the same LQC settings.
Typically, there is no need to enable LQC on both sides of a PPP or MP link.