7210 SAS-MXP, R6, R12, S, SX, T BASIC SYSTEM
CONFIGURATION GUIDE RELEASE 22.9.R1
Virtual chassis
5.2.3 Manually booting a VC IMM-only node
About this task
The IMM-only node can be booted independently of the CPM-IMM nodes. Perform the following steps to
manually configure IMM-only nodes in a VC:
Procedure
Step 1. To boot the IMM-only node, use the SD card provided with the software license that contains the
appropriate boot.tim image.
Step 2. Upon power up, manually interrupt the boot process at the BOF prompt and configure the
following:
a. Specify standalone-vc for the boot loader parameter chassis-role.
b. Specify imm-only for the boot loader parameter vc-stack-node-type.
c. Note the MAC address of the IMM-only node. The MAC address used for VC configuration is
the chassis MAC address printed on the label of the node.
You will need this information to configure the node in the TiMOS context using the
config>system>vc-stack-node slot-number mac-address mac-address command on the
active CPM, when the CPM is up.
The slot number, image location, configuration location, IP addresses, and route information do
not need to be configured on the IMM-only node.
Step 3. Save the file and allow the boot loader to proceed with the boot process.
Step 4. After the CPM has booted up, on the active CPM, follow the prompts in the TiMOS context to
configure the IMM-only slot number and MAC address.
Expected outcome
During bootup, the IMM uses the configured MAC address to identify whether the IMM is part of the stack
and to determine its VC stack name and slot number before loading the TiMOS images.
The IMM-only node communicates with the active CPM node in the boot loader context. If the user has
configured it to be part of the stack, the IMM-only node obtains its slot number and the TiMOS images
required to boot up from the active CPM.
When the IMM-only node receives a VC discovery message containing the MAC address and slot number,
the IMM-only node obtains the location of the TiMOS image (both.tim) and downloads it using the
information received in the discovery message. If an IMM-only node does not receive the VC discovery
message with its MAC address and slot number, it does not load the TiMOS image. Instead, the IMM-only
node will wait for a specific amount of time defined by the system, reboot, and wait again to receive a VC
discovery message with its MAC address. The IMM-only node repeats this process indefinitely or until the
operator removes the node from the VC by disconnecting its stacking ports.
Example
The following output is an example of a BOF configuration for an IMM-only node.
========================================================================
BOF (Memory)
========================================================================
#System Settings:
wait 3
persist off
console-speed 115200
3HE 18197 AAAB TQZZA
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