ip address negotiate

R1(s1/0) == (s1/0)R2

上記の構成にて

• R1(s1/0)のアドレスは139.1.45.4/24
• R2(s1/0)のアドレスはIPCP(Internet Protocol Control Protocol) negotiationによりR1より取得
• R1はR2からのDHCP requestをDHCPサーバ139.1.11.100へ転送(helper addressは使用しない)

R1 Configuration

ip dhcp-server 139.1.11.100
!
interface Serial1/0
 ip address 139.1.45.1 255.255.255.0
 encapsulation ppp
 peer default ip address dhcp

R2 Configuration

interface Serial1/1
 ip address negotiated
 encapsulation ppp

Link

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hdia_r/dia_i1h.htm#wp1184978 http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hdia_r/dia_m1h.htm#wp1182792