Reference Guide  532  Document #: LTRT-17939 
  Mediant MSBR 
Command  Description 
Mode  Defines the PPP IP addressing modes:  
  ‘automatic’ – IP address will be accepted from peer during IPCP 
negotiation. 
  ‘manual’ – set local static IP address and optional subnet mask. 
  ‘unnumbered’ – use unnumbered mode (PPP serial interface 
uses LAN interface ip address). 
a.b.c.d 
Defines the static local IP address set on this PPP serial interface – 
relevant for manual mode only. 
e.f.g.h  Defines the optional static subnet mask set on this PPP serial 
interface - relevant for manual mode only. 
Default 
By default the IP addressing is automatic. 
Command Mode 
Privileged User 
Example 
This example sets IP address 223.4.5.6 on PPP encapsulated serial interface 0/0: 
(conf-if-serial-ppp 0/0)# ip address manual 223.4.5.6 
 
This example sets IP addressing mode to automatic on PPP encapsulated serial interface 
0/0: 
(conf-if-serial-ppp 0/0)# ip address automatic 
73.4.15.6  ip dns-server (PPP over T1) 
This command specifies the primary and secondary DNS servers to be used by this PPP 
serial interface. 
Syntax 
ip dns-server <mode> <a.b.c.d> <e.f.g.h> 
 
Command  Description 
mode  Defines the DNS servers addressing modes:  
  ‘automatic’ – DNS servers’ IP addresses will be 
accepted from peer during PPP negotiation. 
 
‘manual’ – set static DNS servers’ IP address  
a.b.c.d  Defines the IP address of the primary DNS server - 
relevant only for manual mode. 
e.f.g.h  Defines the IP address of the optional secondary DNS 
server- relevant only for manual mode.