lanqueryconf(1M)lanqueryconf(1M)NAMElanqueryconf - query LAN interface configuration information for
LAN_MONITOR mode link aggregates, also called failover groups
SYNOPSIS
ascii_file]
ascii_file]
DESCRIPTION
The command discovers the set of LAN interfaces that can form a
failover group and then maps that information to the ASCII configura‐
tion file.
Options
supports the following options:
Find existing LAN Monitor failover group configuration from the
kernel,
and write it to the ASCII configuration file.
Specifies the name of the ASCII configuration file into which
configuration
information is written. See the "ASCII Configura‐
tion File" section for information about the file
parameters and syntax. By default, information is
written to the file.
Queries the system for the potential failover group configura‐
tion,
and write it to the ASCII configuration file.
Displays verbose output.
ASCII Configuration File
The default ASCII configuration file is It is similar to the Service‐
guard file. This file contains the fields below.
Note: the term is used for a physical link or a link aggregate
with or mode.
·
The aggregate name for a LAN Monitor failover group, where XX is a
decimal number, starting with 00 (lan900).
may generate failover group name where X is the PPA of the physical
link. Such failover group will be ignored unless it is modified
manually.
Each can have the following keywords:
·
This field can be used to specify the preconfigured IP address on
the primary port.
·
Each failover group must have one primary port. The primary port
is usually assigned the highest priority or lowest cost value, so
it will be the port that carries traffic initially. The primary
port is also the port that may have IP addresses configured.
After lanapplyconf creates the failover group, the IP addresses
on the primary port (if any is present) are moved to the failover
group.
Prior versions of APA maintains that the primary port must have
IP address configured and must be the highest priority/lowest
cost. APA 11i v3 observes neither of these rules: the primary
port may be assigned any priority/cost values and it may not have
IP addresses configured. Port that carries traffic depends on
the priority/cost.
HP recommends that the primary port always be assigned the high‐
est priority or the lowest cost in a failover group.
·
Specifies a standby port for the A standby port is a port that
replaces the primary port when the primary is incapable of carry‐
ing traffic.
Both the and keywords have the following fields:
· The LAN interface name (for example, lan0 and lan1).
· The port priority that will be assigned to the port.
· A cost value for the LAN interface preceded by a colon (:) and a
space. This is an optional field.
A port with the lowest normalized cost (cost divided by port's
speed) will carry traffic. When ports have the same normalized
cost, the one with the higher priority is preferred.
For each failover group, either all or none of the ports should
have the cost values assigned. If none of the ports has cost
value assigned, then the failover group uses the default failover
behavior based on priority. See the "Proactive Failover" section
and the for more information.
·
The number of microseconds between polling messages. Polling mes‐
sages are sent between ports in the specified interval for monitor‐
ing the health of all the ports in the failover group. The default
is 10000000 (10 seconds). This keyword can be specified multiple
times in the configuration file. A failover group's polling interval
is set to the last specified interval.
·
The number of polling packets that are missed before deciding to
send a log message to the user that indicates the port might have
problems and the network should be checked. The default is 3.
·
Enables (on) or disables (off) the ability to transmit gratuitous
ARP messages at intervals shorter than 5 seconds. By default, is on.
When the MAC address of a failover group changes, a gratuitous ARP
packet is transmitted. To ensure that other clients and servers
receive the new IP-MAC address mapping, APA/LAN Monitor transmits
more gratuitous ARP packets for 1 minute.
When this option is enabled, LAN Monitor will transmit gratuitous
ARP at every for a total of times immediately after the MAC address
changes. After completing the process, gratuitous ARP packets will
be transmitted every 5 seconds until one minute has elapsed since
the first gratuitous ARP was transmitted.
When this option is disabled, LAN Monitor will transmit gratuitous
ARP at every 5 seconds for 1 minute.
·
Number of microseconds between rapid gratuitous ARP messages. The
range of valid values is 1000000-4000000, inclusive (1 second to 4
seconds). The default value is 1000000 (1 second). Specify a whole
number of seconds as the value you specify is automatically rounded
up to the next whole number of seconds. The value must be a valid
integer. If the value is not in the valid range and is on, the
interval value last processed with the command is used. If is off,
this value is ignored for the corresponding failover group.
·
Number of gratuitous ARP packets sent rapidly. The valid range is
5-60, inclusive. The default value is 10. The value must be a
valid integer. If the value is not in the valid range and is on,
the count value last processed with the command is used. If is off,
this value is ignored for the corresponding failover group.
Proactive Failover
By default, the port in a failover group with the highest priority is
the active port. With proactive failover, the port that is the most
efficient at carrying traffic is the active port. Efficiency is deter‐
mined by assigning a cost to each port in a failover group. This cost
is divided by the port's current speed to yield a normalized port cost;
port speed is the number of links in a link aggregate multiplied by the
link speed, or in the case of a physical port, only the link speed.
The lower the normalized port cost, the higher the port's efficiency.
During certain LAN Monitor events, the normalized port cost might
change on the active or standby ports. When these events occur, the
normalized port cost of the active port and the standby ports are com‐
pared. If a standby port has a lower normalized port cost than the
active port, the standby port becomes the active port.
Sample File
The file specifies failover groups and with total number of 2, 4, 2, 2,
and 1 ports in each, respectively. The first network interface listed
is the primary and the subsequent ones are the standby interfaces.
Failover groups and have polling interval of 5 seconds and dead count
of 2; and have polling interval of 10 seconds and dead count of 3. is
enabled (on). There are IP addresses preconfigured on the primary
ports of lan900 and lan905. There are no IP address preconfigured on
the primary ports of lan901 and lan902.
is a cost-based failover group. The cost values are preceded by a
colon and a space. The primary port has the lowest cost.
is also a cost-based failover group. The primary port and the standby
port have the same cost, but the primary port has higher priority.
When the failover group is created, the normalized cost determines
which port will be the active port; it might not be the one designated
as in the ASCII configuration file. When the failover group is
cleared, the IP address switches back to the port specified as in the
ASCII file if the primary port preconfigured IP address when creating
the failover group.
is a single-port failover group, no aggregate is allocated for it.
POLLING_INTERVAL 10000000
DEAD_COUNT 3
LM_RAPID_ARP on
LM_RAPID_ARP_INTERVAL 1000000
LM_RAPID_ARP_COUNT 10
FAILOVER_GROUP lan1
STATIONARY_IP 193.12.14.54
FAILOVER_GROUP lan900
STATIONARY_IP 194.12.14.55
PRIMARY lan2 5
STANDBY lan3 3
FAILOVER_GROUP lan901
PRIMARY lan4 5
STANDBY lan5 4
STANDBY lan7 3
STANDBY lan6 3
POLLING_INTERVAL 5000000
DEAD_COUNT 2
FAILOVER_GROUP lan902
PRIMARY lan903 5 : 2
STANDBY lan904 3 : 3
FAILOVER_GROUP lan905
STATIONARY_IP 192.12.14.56
PRIMARY lan907 9 : 3
STANDBY lan908 7 : 3
AUTHOR
was developed by HP.
SEE ALSOlanapplyconf(1M), lancheckconf(1M), landeleteconf(1M), lanscan(1M),
netstat(1M).
User manuals at
lanqueryconf(1M)
