Deleting an HP APA interface
Before attempting to delete an HP APA interface, ensure that there are no applications or upper
layer protocols active on the interface. Perform a critical resource analysis operation on the
interface, by entering:
# nwmgr --cra -c lanaggregate_instance
The
--cra
operation displays all applications and commands currently assigned to the interface.
To determine if there are applications or commands running on
lan900
, enter the following:
# nwmgr --cra -c lan900
CRA REPORT SUMMARY:
Critical Resources Analysis(CRA) reported SUCCESS.
No resources usages have been identified during the analysis.
This shows no applications or commands on the interface.
If the
--cra
operation indicates no critical resources are assigned to the interface, delete the
APA interface with the following command:
nwmgr –d –c lanaggregate_instance
To delete
lan900
, enter:
# nwmgr -d -A links=all -c lan900
Deletion of links all ports from lan900 succeeded.
Resetting a data flow
To ensure that packets are transmitted in order, HP APA uses the same data flow. For example,
for the LB_MAC load balancing algorithm, traffic between same source/destination MAC pair
is always sent through the same port. Traffic between this specific pair is one data flow. See
“Load balancing” (page 10)
for a description of HP APA load balancing.
You might need to reset or clear the data flow for a link aggregation, for example, when adding
a new port to a link aggregate. In this case, the data flow continues to use the same port; no traffic
is sent through the new port unless a new data flow is created and mapped to that port. To reset
a data flow, enter the following command:
# nwmgr -r -q data_flow -c lanaggregate_instance
where
aggregate_instance
is the link aggregate instance number (for example, 900, 901, ...).
After you enter the command, HP APA regenerates the data flow mapping; all ports are now
eligible to carry traffic. As a result, packets can be temporarily delivered out of order. Out of
order packets are handled by upper layer protocol (for example, TCP/IP).
Task comparison with other LAN commands
Table 5-1
shows some of the common
lanadmin
,
linkloop
, and
lanscan
, and
lanapplyconf
commands and the corresponding
nwmgr
command. All examples in the table use lan900, lan1,
lan2, lan3, and lan4 for illustrative purposes only.
Table 5-1 Legacy Commands and Corresponding nwmgr Commands
nwmgr Command
Legacy Command
Task
nwmgr --help -S apa
lanadmin -X -H 900
Display command help
nwmgr -c lan900
lanadmin -x -v 900
View link aggregate status
nwmgr -a -A links=1,2 -A
mode=MANUAL -I 900 -S apa
lanadmin -X -a 1 2 900
Create a MANUAL mode link
aggregate
nwmgr -a -A links=1,2 -A
mode=LAN_MONITOR -I 900 -S apa
lanapplyconf
Create a failover group
54
Using the nwmgr command
