Ethernet SNMP Module Installation and Reference Guide ( J2603B) 1995-10

AUxiliary
If an auxiliary module is attached to the HP Ethernet SNMP Module
in the hub you have accessed, this command starts a console session
for the auxiliary module. For example, you can communicate with an
HP Dial-A-LAN Module or an HP Router 210 Module.
BAckup
To configure one of the hub’s ports for dedicated use in a backup
(redundant) link to another hub.
The HP AdvanceStack hubs allows you to use any two of its network ports
for a redundant link to another hub in your network. The backup link
normally carries no traffic, but it is automatically activated if the primary
link fails. Note that any of the ports can be the backup port to any other
port.
When you enter the Backup command, you are prompted for these values:
Default Description
Backup Port Disabled The port used for the backup link. Enter the port ID (see the Port
command description for the port IDs). Or, enter DI (for disable) if
you wish to remove an existing backup link configuration.
Primary Port A1 The port used for the primary link. Enter the port ID.
Remote Station
Address
000000-000000 The 12-digit hexadecimal station address of the hub at the remote
end of the critical link.
Seconds Between
Test Packets
1 second How often you want the hub to send an IEEE 802.2 Test packet to
the remote hub over the primary link.
Consecutive
Failures
2 seconds The number of consecutive Test packet response failures that will
trigger activation of the backup link. For example, enter 5 to
activate the backup link on the fifth failure.
The hub monitors the primary link by sending IEEE 802.2 Test packets at the
specified frequency to the specified remote hub. If “n” consecutive Response
packets are not returned from the remote hub, the primary port is disabled
and the backup port is enabled.
When the primary link is repaired, you must re-enable the primary port by using
the Port command. It is not automatically re-enabled. When the primary port
is re-enabled, the backup port is disabled automatically and returned to
backup mode. See “Reactivating the Primary Link” in appendix D, “Backup
Links” in the HP AdvanceStack 10Base-T Hubs Installation and Reference
Guide. This appendix also covers more information on backup links,
including requirements, limitations, and sample topologies.
Extended Hub
Capabilities
Extended Hub Capabilities
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