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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter5 Configuring Redundancy
Configuring Switch Fabric Enhanced High System Availability Operation (Catalyst8540MSR)
EHSA:Syncing monvars to secondary, : BOOTLDR=[OK]
Switch#
Switch# redundancy prepare-for-cpu-removal
This command will cause this CPU to go to the
rom monitor through a forced crash.
After this cpu goes to the rom monitor prompt, it is
safe to remove it from the chassis
Please DO NOT REBOOT this cpu before removing it
Do you want to remove it?[confirm]y
Queued messages:
1d22h: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debugging outpu.
*** System received a reserved exception ***
signal= 0x9, code= 0x0, context= 0x61818df8
PC = 0x600b62e0, Cause = 0x20, Status Reg = 0x34008702
AT: be840000, V0: 9, V1: 0
A0: 2b, A1: 9, A2: 0
A3: 61818df8, T0: 30, T1: 34008701
T2: 34008700, T3: ffff00ff, T4: 61059f88
T5: 7f, T6: 0, T7: 0
S0: 34008701, S1: 1, S2: 9
S3: 0, S4: 61818df8, S5: 611f8540
S6: 611e3740, S7: 61363710, T8: 47d1
T9: 618189d8, K0: 61612634, K1: 600b7e30
GP: 61177fa0, SP: 61818da8, S8: 611e3740
RA: 600a81b8
STATUS: 34008702
mdlo_hi: 0, mdlo: 0
mdhi_hi: 0, mdhi: 0
bvaddr_hi: ffffffff, bvaddr_lo: ffffffff
cause: 20, epc_hi: 0, epc:600b62e0
err_epc_hi: 0, err_epc: 200004
TIGER Masked Interrupt Register = 0x0000007f
TIGER Interrupt Value Register = 0x00000020
monitor: command "boot" @Ø--<ÒagZç
rommon 3 >
Configuring Switch Fabric Enhanced High System Availability Operation (Catalyst 8540 MSR)

Slots5 , 6, and7 in the Catalyst 8540 MSR chassis can accommodate either two or three switch

processor cards, with a switching capacity of 10Gbps each. The possible configurations are as follows:

Two switch processors—20 Gbps non-EHSA switching fabric (no spare)

Three switch processors—20 Gbps EHSA switching fabric (one spare)

When three switch processors are installed, two are active at any time, while the third runs in standby

mode. By default, switch processors 5 and 7 are active and switch processor 6 is the standby. To force

the standby switch processor to become active, use the redundancy preferred-switch-card-slots

command.