Lucent Technologies 9076 Manuale Utente

C-4

SP Switch Router Adapter Guide - 1.4 Update 2

Configuration tasks

Given:

–

the IP network is 198.174.11.0

–

the netmask is 255.255.255.0

–

there can be up to 254 nodes on the network
(including the two SP Switch Router Adapter cards)

Configure the SP processor nodes with 198.174.11.0 as the network and 255.255.255.0 
as the netmask. 

The address of individual nodes must be between 198.174.11.1 and 198.174.11.254.

Configure the two SP Switch Router Adapter cards as follows: 

- divide the 198.174.11.0 network into two subnets, 198.174.11.0 and 198.174.11.128,
   with a subnet netmask of 255.255.255.128

- assign any of the 198.174.11.1-126 addresses, mask 255.255.255.128, to card 

gt010

- assign any of the 198.174.11.129 -254 addresses, mask 255.255.255.128, to card 

gt020

Incoming traffic  (going to SP processor nodes)

Traffic destined to node addresses 198.174.11.1 to 198.174.11.127 is routed through 

gt010

.

Traffic destined to node addresses 198.174.11.129 to 198.174.11.255 is routed through 

gt020

. 

Each SP Switch Router Adapter card handles roughly half the incoming traffic.

Outgoing traffic  (coming from SP processor nodes) 

Traffic destined to the SP Switch Router Adapter cards from SP processor nodes is directed by 
changing the SP processor nodes’ default route or adding static routes to force their outgoing 
traffic to be sent to 

gt010

 or 

gt020

. For example, half of the nodes would have their default 

route set to the 

gt010

 card and the other half would have their default route set to the 

gt020

 

card.

If more SP Switch Router Adapter cards are configured, you must divide the net into more 
(but smaller) subnets. For example, if the number of cards increases to four, you would set the 
subnet netmask to 255.255.255.192 (ff.ff.ff.c0).