v Checksum calculation of outgoing TCP and UPD datagrams (prior to V4R4) | ||
v Checksum verification of incoming TCP and UPD datagrams (prior to V4R4) | ||
v Outbound batching of TCP and UDP datagrams. | ||
v Fragmentation of TCP and UDP datagrams into segments that match the MTU | ||
| size. | |
v Starting with V4R2, iSeries collects all TCP datagrams in one batch and UDP | ||
| datagrams in a second batch. Ports and IP addresses are ignored. Releases prior | |
| to V4R2 batch together datagrams at the IOP when these conditions are true: | |
| – The protocol (TCP or UDP) matches | |
| – The source and destination ports match | |
| – The source IP address and destination IP address match | |
| – They arrive consecutively into the IOP | |
| The IOP then passes the datagram batch to IP. | |
v Handling of IP and ICMP datagrams in error (unless IP NAT, which disables this | ||
| function, is active) | |
v Resolving physical addresses using ARP protocol | ||
These functions are called | ||
by the IOP or the System Licensed Internal Code (SLIC), depends on the IOP type, | ||
the OS/400 release, and the TCP/IP configuration. For details about specific | ||
functions, contact your local service representative. | ||
available on these IOPs: | ||
v | #2617 Ethernet/IEEE 802.3 adapter/HP | |
v | #2619 16/4 Mbps | |
v #2618 Fiber distributed data interface adapter (FDDI) | ||
v #2665 Shielded distributed data interface adapter (SDDI) | ||
v #2666 | ||
v #2668 iSeries wireless LAN adapter | ||
Note: You can get the same function without using one of the above IOP adapters | ||
| (done instead at a higher level in the system (SLIC)). When you use the X.25 | |
| protocol, you do not gain the advantage of the |
The
v#2723 PCI Ethernet IOA
v#2724 PCI
v#2838 PCI 100/10 Mbps Ethernet IOA
v#6149 16/4 Mbps
v#2811 PCI 25 Mbps UTP ATM IOA
v#2812 PCI 45 Mbps Coax T3/DS3 ATM IOA
v#2813 PCI 155 Mbps MMF ATM IOA
v#2814 PCI 100 Mbps MMF ATM IOA
v#2815 PCI 155 Mbps UTP 0C3 ATM IOA
v#2816 PCI 155 Mbps MMF ATM IOA
v#2818 PCI 155 Mbps SMF 0C3 IOA
v#2819 PCI 34 Mbps Coax E3 ATM IOA
72OS/400 TCP/IP Configuration and Reference V5R1