Version 7.2 533 Mediant MSBR
Reference Guide 73. WAN Access Commands
Default
By default no DNS servers are defined for the PPP serial interface.
Command Mode
Privileged User
Example
This example sets the static DNS servers’ IP addresses on the PPP encapsulated serial
interface 0/0:
(conf-if-serial-ppp 0/0)# ip dns-server manual 10.1.1.10 10.1.1.11
73.4.15.7 ip mtu (PPP over T1)
This command specifies the maximum transfer unit value to be used by this PPP serial
interface.
Syntax
ip mtu <mode> <value>
Command Description
mode Defines the MTU mode to be used:
 ‘automatic’ – Set to default value 1500 bytes.
 ‘manual’ – Set manually according to following value.
value Defines the MTU in manual mode (68-1500).
Default
By default, the MTU is set to 1500 bytes.
Command Mode
Privileged User
Example
This example sets the mtu to 1400 bytes:
(conf-if-serial-ppp 0/0)# ip mtu manual 1400
73.4.15.8 authentication chap (PPP/MLP over T1)
This command enables Challenge Handshake Authentication Protocol (CHAP) to be used by
this PPP/MLP serial interface.
Syntax
authentication chap