4000 Router Series Layer 2 - WAN Configuration Guide

# After the configuration is complete, display summary information about Serial 2/0 on Router B.

[RouterB-Serial2/0] display interface serial 2/0 brief

Brief information on interface(s) under route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) - spoofing

Interface Link Protocol Main IP Description

S2/0 UP UP 200.1.1.10

The output shows Serial 2/0 obtains IP address 200.1.1.10 through PPP negotiation.

# Ping Serial 2/0 of Router A from Router B.

[RouterB-Serial2/0] ping 200.1.1.1

Ping 200.1.1.1 (200.1.1.1): 56 data bytes, press escape sequence to break

56 bytes from 200.1.1.1: icmp_seq=0 ttl=128 time=3.197 ms

56 bytes from 200.1.1.1: icmp_seq=1 ttl=128 time=2.594 ms

56 bytes from 200.1.1.1: icmp_seq=2 ttl=128 time=2.739 ms

56 bytes from 200.1.1.1: icmp_seq=3 ttl=128 time=1.738 ms

56 bytes from 200.1.1.1: icmp_seq=4 ttl=128 time=1.744 ms

--- Ping statistics for 200.1.1.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 1.738/2.402/3.197/0.576 ms

The output shows Serial 2/0 of Router A can be pinged.

Specifying an address pool on the server interface

Network requirements

As shown in Figure 7, configure Router A to allocate an IP address from the address pool on Serial 2/0

of Router A to Serial 2/0 of Router B through PPP negotiation..

Figure 7 Network diagram

Configuration procedure

1. Configure Router A:

# Configure an address pool aaa that contains IP addresses 200.1.1.10 through 200.1.1.20 for

the group AAA.

<RouterA> system-view

[RouterA] ip pool aaa 200.1.1.10 200.1.1.20 group AAA

# Configure Serial 2/0 to assign an IP address from the address pool aaa to the peer interface.

[RouterA] interface serial 2/0

[RouterA-Serial2/0] remote address pool aaa

# Configure an IP address for Serial 2/0.

[RouterA-Serial2/0] ip address 200.1.1.1 16

2. Configure Router B:

# Enable IP address negotiation on Serial 2/0.