TCP/IP-assist functions
that are available on frame relay IOAs are:
v#2699 Two-Line WANIOA
v#2720 PCI WAN/TwinaxialIOA
v#2721 PCI Two-Line WANIOA
Communications restrictions apply if any of the following communication functions
are required when using the frame relay IOAs, as listed above:
vX.25, Frame Relay, or IPX Protocol
vSDLC protocol, if used to connect to more than 64 remote sites
vCommunications line speeds greater than 64 Kbps and up to 2.048 Mbps for the
synchronous data link control (SDLC) or frame relay protocols (bisync is always
limited to a maximum of 64 Kbps)
vCommunications line speeds greater than 64 Kbps and up to 640Kbps for X.25
Merge Host Table Performance
Youcan use the following data to help you plan for and anticipate performance
when merging host tables. The data represents averages of measurements that are
taken. The actual time required on your AS/400 system will be different.
Three cases were measured:
vSmall merge—merge a 250-record file into the local host table that currently has
50 entries
vMedium merge—merge a 2000-record file into the local host table that currently
has 50 entries
vLarge merge—merge a 5000-record file into the local host table that currently
has 50 entries.
The results of this test are shown in Table37.
Table37. Merge Host Table Performance
Number of records
merged Record format Elapsed time
(min:sec) CPU percent
250 *AIX 0:42 43.7
2000 *NIC 5:38 49.4
5000 *NIC 13:54 48.6
This data equates to about 6 records per second and about .07-.08 processing unit
seconds per record.
Running TCP/IP Only: Performance Considerations
Certain configurations of 2838 - 10/100 Mbps Ethernet cards allow you to run the
IOP with only TCP/IP instead of all protocols for better performance. Youneed a
2838 Ethernet card with either:
v2810 IOP
v2809 IOP (the 2838 must be the only input/output adapter (IOA)IOA on the IOP)
If you have one of these configurations, you can use the TCPONLYparameter
when you create or change your Ethernet line descriptions. Setting TCPONLYto
*YES in other hardware configurations has no effect on the line.
Chapter20. TCP/IP Performance 427
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