Network Configuration Examples

Example 2: Multiple cards, single partition

This network configuration divides the traffic for an SP processor node partition between two or more SP Switch Router Adapter cards and achieves some load leveling among the SP processor nodes. It provides dual, not truly redundant, connections to the router in case of SP Switch Router Adapter card failure.

For this type of configuration, you must divide the router side of the IP network into logical subnets and assign each SP Switch Router Adapter card to a different subnet. This logical subnetting is required only on the router, the SP Switch viewpoint sees a single network.

Configuration requirements

As configured in example 2, each SP Switch Router Adapter card is an active node on a different subnet, each card interface is a subnet.

Each card must have a unique IP address. An alias IP address cannot be used on two active cards on the same router system.

Enable ARP on the SP Switch network to allow assignment of alias IP addresses as part of the recovery procedure described later in this section.

On the router, netmasks are used to create different subnets when multiple SP Switch Router Adapter cards are connected to the same network.

!

Warning: Be careful that the subnet mask does not, in effect, create a single subnet.

 

If Card 1 (gt010) is assigned the 255.255.255.0 netmask, then, for routing, both SP

 

 

Switch Router Adapter cards would be on a single subnet. This type of configuration does

 

not work. Each SP Switch Router Adapter card in a single router must be configured on a

 

different subnet.

 

 

card 198.174.11.1

net 198.174.11.0

 

SP Switch Router

 

Adapter card 1 - gt010

mask 255.255.255.128

 

 

 

SP

 

Switch

 

Router

 

 

 

card 198.174.11.129

 

 

SP Switch Router

 

net 198.174.11.128

 

Adapter card 2 - gt020

 

mask 255.255.255.128

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SP

Switch

1

3

4

5

2

SP processor node

SP processor node

SP processor node

Partition

net 198.174.11.0 mask 255.255.255.0

ARP table

Switch node number

gt010 (0): 198.174.11.1

at 0:0:0:0:0:1

gt020 (0): 198.174.11.129 at 0:0:0:0:0:2

Figure C-2. Example 2 – multiple card, single SP partition configuration

SP Switch Router Adapter Guide - 1.4 Update 2

C-3

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Lucent Technologies 9076, 9077 16S, 9077 04S manual Example 2 Multiple cards, single partition, ARP table