In a stack, the Commander functions as a single switch and the Standby and Members function as additional network ports for that switch. Switch configuration is performed in the same manner as for any other switch, as described in the other HP 2920 manuals.
For features configured on specific switch ports in a stack, configuration procedures are the same as for stand-alone switches, but port designations for the ports in the stack are modified. Each port is identified by the stack member ID of its switch followed by a slash and then the port number as shown on the switch. For example, for a switch with stack member ID 3, port 10 on that switch is identified as port 3/10.
Displaying show interfaces brief
output for stack member 3 port 10, interface 3/10
HP Switch(config)#: show interfaces brief 3/10 Status and Counters - Port Status | Intrusion MDI Flow Bcast Port Type | Alert Enabled Status Mode Mode Ctrl Limit ------------ --------- + --------- ------- ------ ---------- ---- ---- ----- 3/10 100/1000T | No Yes Down 1000FDx off 0
Similarly, CLI commands requiring specific port (interface) numbers on an HP 2920 switch configured for stacking require modified port designations. For example, to enter the port context for port 10 on stack member 2, enter this command:
In the output containing designated port numbers for an HP 2920 switch configured for stacking, port numbers are likewise listed in the modified format.
Displaying show interfaces config
output
HP Switch(config)#: show interfaces config Port Settings Port Type | Enabled Mode Flow Ctrl MDI ------ --------- + ------- ------------ --------- ---- 1/1 100/1000T | Yes Auto Disable Auto 1/2 100/1000T | Yes Auto Disable Auto 1/3 100/1000T | Yes Auto Disable Auto . . . 2/1 100/1000T | Yes Auto Disable Auto 2/2 100/1000T | Yes Auto Disable Auto 2/3 100/1000T | Yes Auto Disable Auto 2/4 100/1000T | Yes Auto Disable Auto . . .
Attempting to enter a CLI command for a port on a stack member without using the modified port number format generates a “Module not present...” message such as the following:
The show logging
command troubleshoots problems in stacking.
Syntax
The options a|r|substring
can be used in combination with an event class option.
The remaining event class options are listed in order of severity with lowest severity first. The output of the command is confined to event classes of equal or higher severity.
Only one of options d|i|w|e|p|m
can be used in the command at a time.
Each OOBM port of a member is assigned one MAC address from that member's manufacturing allocated range. The OOBM port also can be assigned an IP address (IPv4 /v6/DHCP/Manual/Auto-Config/LinkLocal). The Commander's OOBM IP address (called the Global IP address) is used for managing the Commander through the OOBM port.
After switchover/failover of control from the Commander to the Standby, the OOBM port IP address of the new Commander is the Global IP address. This change in address causes some undesirable behavior (after failover):
To avoid these issues, use a static IP address. During failover, it will be as if the IP address is reconfigured. All ARP entries are updated automatically.
For more information on OOBM operation, see the appendix, “Network Out-of-Band for the HP 2920 Switches,” in the latest Management and Configuration Guide for your HP 2920 switch.