Brocade Communications Systems MLXe Series User Manual

Brocade MLXe Series Hardware Installation Guide 161
53-1003030-01
Managing the device
5
MP Presence from LP Detection (Headless Router Operation)
On entering a state where the MPs go down, the chassis enters a headless state. The LPs are
unaware of the MP’s state and continue to perform. Hardware flooding traffic is processed and
traffic is dropped that needs to pass through the MP. To avoid this situation, the LP maintains the
MP state and brings itself down in case no MPs are present as shown in Table 32.
To know the presence of MP by LP, accounting of IPC and keep-alive messages from the MP are
performed in the LP.
The current state of MP presence is displayed when you enter the ipc show mp-presence state
command as shown in Table 33.
Rolling Reboot
The Rolling Reboot feature provides a solution for continuously rebooting the line card when a
system failure occurs from causes including BIST failure, ECC errors, module init failure, and
hardware failure during system initialization. When there is failure, the system automatically
reboots in an infinite loop until the failure is resolved. Repetitious reboot cycles consume CPU
resources, power, and result in unwanted IPC traffic to the MP.
When the system detects the continuous reboot of a line card, that line card is placed into
interactive or down state mode after ten (10) consecutive reboot cycles, and a failure message is
sent to the MP.
FPGA Image Mismatch
A version mismatch between FPGA applications and hardware results in system failure and
continuous reboot on every module initialization failure. The Rolling Reboot feature places the line
card into the interactive or down state mode on detection of an FPGA version mismatch.
This feature will detect the incompatibility between application FPGA version and Hardware FPGA
version and put the card into down state if there is mismatch.
TABLE 32 MP Presence Detection LP State on Bringing DOWN the LP Card/Port
LP State Description Support MP Presence Detection
DOWN Line cards are
powered off,
when MP
absence is
detected.
LP supports
placing the line
cards in the
DOWN state.
1 LP cards will be power cycled and brought to the
UP state.
2 LP image will SYNC with MP image on boot of
the LP.
TABLE 33 MP-Presence States for Show MP-Presence State
MP Presence State
MP_INIT
MP_ALIVE
MP_SWITCH
MP_SDS_CON
MP_WAIT
MP_ALIVE_DISABLED

Brocade Communications Systems MLXe Series Specifications

General

Brand	Brocade Communications Systems
Model	MLXe Series
Category	Control Unit
Language	English