Specifications

Option Description
MAC interface If the IP stack has more than one network interface, this
parameter indicates which interface to use.
Related Information
• Known Limitations on page 11-10
• Nios II Software Build Tools Reference
For more information about BSP settings for the NicheStack, refer to the Nios II Software Build Tools
Reference chapter of the Nios II Software Developer's Handbook.
IP Options
Table 11-3: IP Options
Option Description
Forward IP packets If there is more than one network interface, this
option is turned on, and the IP stack for one interface
receives packets that are not addressed to it, the stack
forwards the packet out of the other interface.
Reassemble IP packet
fragments
If this option is turned on, the NicheStack TCP/IP
Stack reassembles IP packet fragments as full IP
packets. Otherwise, it discards IP packet fragments.
This topic is explained in Unix Network Program‐
ming by Richard Stevens.
Related Information
Known Limitations on page 11-10
TCP Options
Table 11-4: TCP Zero Copy Options Available When Enabled
Option Description
Use TCP zero
copy
This option enables the NicheStack zero copy TCP API. This
option allows you to eliminate buffer-to-buffer copies when
using the NicheStack TCP/IP Stack. For details, refer to the
NicheStack reference manual. You must modify your
application code to take advantage of the zero copy API.
Further Information
The tutorial provides in-depth information about the NicheStack TCP/IP Stack, and illustrates how to use
it in a networking application.
NII5V2
2015.05.14
IP Options
11-9
Ethernet and the NicheStack TCP/IP Stack - Nios II Edition
Altera Corporation
Send Feedback