Installing PeerMaster LAN Software
Adjusting the Aging Timers
To support packet-switching functions, PeerMaster adapters
maintain an internal database containing packet-forwarding
information. This table can contain 4096 entries. To prevent the
overflow of this table, unused entries are purged from the table on a
periodic basis. Aging timers define the length of this period.
Entries not accessed during the time specified are purged from the
database.
Once purged, a destination address is treated as an unlearned
address. Packets to unlearned destinations are sent out to all ports
to ensure delivery of the data. When the PeerMaster adapter
receives a response from the destination, the forwarding information
table is updated and subsequent packets to that address are no
longer sent out to all ports.
Thus, a long duration for the aging timer reduces traffic caused by
unlearned destinations. A duration that is too long, however,
results in unused entries remaining in the table for long periods of
time. This might result in an overflow of the table. New
destinations, which cannot be stored in the data base, are treated as
unlearned traffic.
Use the AGE keyword to customize the aging timer to meet the
specific needs of your network. This keyword specifies aging-timer
values as follows:
:LOAD D:\[PATH]MXMCA4BT.LAN SLOT=11 AGE=N
:LOAD D:\[PATH]VNET.LAN AGE=N
Where N specifies a duration in seconds. Thus, a value of 30
specifies a duration of 30 seconds.
Note that the keyword must be specified on the load command lines
for MXMCA4BT.LAN and VNET.LAN. Use the same value on both
command lines.
Minimum value of N
=
1
Maximum value of N
=
65535
Default value of N
=
60
Chapter 2. Installing Your Software
55
Summary of Contents for PC Server 520
Page 1: ...PC Server 520 User s Handbook for PCI Micro Channel IBM...
Page 86: ...Installation Checklist 70 PC Server 520 User s Handbook for PCI Micro Channel...
Page 146: ...Using the Mini Configuration Program 130 PC Server 520 User s Handbook for PCI Micro Channel...
Page 190: ...Using the SCSISelect Utility Program 174 PC Server 520 User s Handbook for PCI Micro Channel...
Page 385: ...Installing Additional Test Programs 207 CMD 3 Chapter 7 Solving Problems 369...
Page 438: ...IBM Part Number 78H6336 Printed in U S A May 1996 78H6336...
