NEC Univerge SV9100 System Hardware Manual page 357

Issue 3.0
SV9100 System Hardware Manual
6.5.2.2 GCD-CP10 IP Address Assignment
The GSWU Main board is provided with an IP address from the
back plane CPU during the initialization sequence. The
provision of an IP address from the back plane identifies the
Main board. If the IP address is set to 0 by the CPU during
initialization, the blade is determined to be an Add-on.
The IP address for the GSWU is assigned in Program 10-55 on
the system. It contains the settings for the IP Address, Subnet
Mask and Gateway IP Address.
6.5.2.3 Group Formation
When a GSWU determines that it is an Add-on board due to
the lack of an IP address from the backplane, it sends a
broadcast P2P message (defined in separate documentation)
to all the GSWU units in the system until it receives an
acknowledge message from the Main board.
The Main board receiving this broadcast message
acknowledges by sending port identification information to the
Add-on board.
6.5.2.4 Port Number Determination
When a Main board is initialized, the board assigns the first
eight ports as port 1 ~ 8. When subsequent Add-on boards'
broadcast messages are received, the Main board assigns port
numbers on a first-come, first-serve basis.
To have deterministic port assignment, it is recommended that

the Add-on boards be inserted sequentially starting with the
desired lower port numbers first.
When a board is removed, the port numbers are not
automatically removed. The operator, however, can remove
any assignment by accessing the Main board GUI.
Example:
Main board is inserted in slot 3, one Add-on board inserted in
slot 5. Main board has ports 1 ~ 8; Add-on board has ports 9 ~
16.
1. User inserts a new Add-on board in slot 2.
The new board gets assigned ports 17 ~ 24.

2. User removes Add-on board and moves it to slot 6.
The re-inserted board automatically gets ports 17 ~ 24

(9 ~ 16 are unavailable)


User can erase the ports 9 ~ 16.
Then reinsert the board in slot 6 to get ports 9 ~
16.
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