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Today, I will tell you what to do if the HP APA mode setting leads to the packet loss of the dual network card. The content of the article is good. Now I would like to share it with you. Friends who feel in need can understand it. I hope it will be helpful to you. Let's read it along with the editor's ideas.

I. description of the problem

A user reported that the access to the HP minicomputer system was very slow.

Second, alarm information

Log in to your host scp3 by dialing and check the relevant logs, including: syslog,event log,network log,bdf,top,glance,ts99,crash, but no alarms or errors are found.

Third, analyze the causes of the problems

This phenomenon occurred on this host many times a year ago. After a comprehensive inspection of the host and the network, no abnormality was found. After rebooting the host at that time, the failure was restored.

This time, log in to your host scp3 again by dialing, and check the relevant logs, including syslog,event log,network log,bdf,top,glance,ts99,crash, but no alarms or errors are found.

Later, it was found that the network card was configured with APA (dual network card binding), while the packet loss occurred on the APA901 network card:

PPA Number = 901

Description = lan901 Hewlett-Packard LinkAggregate Interface

Type (value) = ethernet-csmacd (6)

MTU Size = 1500

Speed = 200000000

Station Address = 0xe7f4fc6a8

Administration Status (value) = up (1)

Operation Status (value) = up (1)

Last Change = 671

Inbound Octets = 2835813758

Inbound Unicast Packets = 442129046

Inbound Non-Unicast Packets = 25506896

Inbound Discards = 111073

Inbound Errors = 0

Inbound Unknown Protocols = 424

Outbound Octets = 3383156594

Outbound Unicast Packets = 1287673364

Outbound Non-Unicast Packets = 111073

Outbound Discards = 0

Outbound Errors = 0

Outbound Queue Length = 0

Specific = 0

Configuration file for APA:

HP_APA_LOAD_BALANCE_MODE [0] = LB_MAC

HP_APA_HOT_STANDBY [0] = off

There have been cases in which a user's two servers encountered performance problems in the process of using APA software, as shown in: when APA is configured as load_balance, the CPU utilization rate of the switch is very high, which is maintained at more than 60%, and the packet loss of network traffic is relatively serious; when configured in hot_standby mode, the CPU utilization rate of the switch is 20-30%, and the network communication is normal.

Therefore, it is recommended to modify the configuration file of APA as follows:

HP_APA_LOAD_BALANCE_MODE [0] = LB_MAC

HP_APA_HOT_STANDBY [0] = on

Then restart the APA process:

# / sbin/init.d/hpapa stop

# / sbin/init.d/hpapa start

Check the APA901 Nic status:

Scp3# [/ etc/rc.config.d] lanadmin-x-v 901

Link Aggregate PPA #: 901

Number of Ports: 2

Ports PPA: 0 1

Link Aggregation State: LINKAGG MANUAL

Group Capability: 5

Load Balance Mode: Hot Standby (LB_HOT_STANDBY)

IV. Implementation steps

1. Modify the configuration file of APA as follows:

HP_APA_LOAD_BALANCE_MODE [0] = LB_MAC

HP_APA_HOT_STANDBY [0] = on

2. Then restart the APA process:

# / sbin/init.d/hpapa stop

# / sbin/init.d/hpapa start

3. Check the status of APA901 network card:

Scp3# [/ etc/rc.config.d] lanadmin-x-v 901

Link Aggregate PPA #: 901

Number of Ports: 2

Ports PPA: 0 1

Link Aggregation State: LINKAGG MANUAL

Group Capability: 5

Load Balance Mode: Hot Standby (LB_HOT_STANDBY)

V. suggestions and summaries

It is recommended that when the host is configured with APA, do not select LOAD_BALANCE_MODE, but choose HOT_STANDBY mode to avoid the above failures.

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