User`s guide

IP Address Allocation
5-7
8000-A2-GB21-10
June 1997
Peer IP Addresses
Synchronous ports are configured with peer IP addresses. Peer IP addresses
are used to indicate directly connected systems.
 For the MCC card’s s1b (backplane) interface, the peer IP address should be
set to indicate the subnet encompassing the DSL cards and RTUs.
The following illustration shows a HotWire DSLAM system configured with
one MCC card and four DSL cards.
97-1546
8
MCC Card
s1b base address:
135.1.3.1/24
peer IP address:
135.1.3.0
net
DSLAM System
System Backplane Bus
DSL Card 1
s1b: 135.1.3.2/24
DSL Card 2
s1b: 135.1.3.7/24
DSL Card 3
s1b: 135.1.3.12/24
DSL Card 4
s1b: 135.1.3.17/24
— The IP address of the MCC card’s s1b interface is 135.1.3.1.
— The IP addresses of the DSL card’s s1b interfaces are all in the same
subnet (135.1.3).
— Therefore, the directly connected peer subnet is its peer IP address,
135.1.3.0.
 For the DSL card’s s1c through s1f interfaces, the peer IP address should be
set to indicate the management IP address of the directly connected RTU.
The peer address for the DSL card is a host route because the peer address
identifies a specific RTU. Specifically, the peer address of each DSL card’s
DSL port is the HotWire 5446 RTU’s management IP address. (The peer
address is assigned to the RTU through Internet Protocol Control Protocol
(IPCP) negotiation.)