Dell C1048P Port Extender Networking C1048P Installation Guide - Page 17

C1048P Standby

Get Dell C1048P Port Extender PDF manuals and user guides View all Dell C1048P Port Extender manuals
Add to My Manuals
Save this manual to your list of manuals

Page 17 highlights

Figure 8. C1048P Stack in a Ring Topology 1. C1048P stack 2. Mini-SAS cables attached in a ring topology The C1048P stack in Figure 8 is connected in a ring topology with the following physical connections between port extenders. The PEs are numbered Unit 0 to Unit 2. After you power on the stack units, the Stack Master LED on the C1048P that is elected master displays solid green. • The bottom mini-SAS port on the top unit is connected to the top mini-SAS port on the middle unit. • The bottom mini-SAS port on the middle unit is connected to the top mini-SAS port on the bottom unit. • The bottom mini-SAS port on the bottom unit is connected to the top mini-SAS port on the top unit. C1048P Standby A C1048P stack supports a standby or backup unit that assumes the stack master role if the master unit fails. When the system detects a stack-master failure, the C9010 initializes the standby unit and it becomes the stack master. The parent C9010 maintains the running configuration for the stack, which it pushes to all stack units. When a PE stack first comes up, the master and standby units are chosen based on the MAC address. By default, the unit with the highest MAC address becomes the master; the unit with the second highest MAC address becomes the standby. Installing the Hardware 17

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
Figure 8. C1048P Stack in a Ring Topology
1.
C1048P stack
2.
Mini-SAS cables attached in a ring topology
The C1048P stack in Figure 8 is connected in a ring topology with the following physical connections
between port extenders. The PEs are numbered Unit 0 to Unit 2. After you power on the stack units, the
Stack Master LED on the C1048P that is elected master displays solid green.
•
The bottom mini-SAS port on the top unit is connected to the top mini-SAS port on the middle unit.
•
The bottom mini-SAS port on the middle unit is connected to the top mini-SAS port on the bottom
unit.
•
The bottom mini-SAS port on the bottom unit is connected to the top mini-SAS port on the top unit.
C1048P Standby
A C1048P stack supports a standby or backup unit that assumes the stack master role if the master unit
fails. When the system detects a stack-master failure, the C9010 initializes the standby unit and it
becomes the stack master. The parent C9010 maintains the running configuration for the stack, which it
pushes to all stack units.
When a PE stack first comes up, the master and standby units are chosen based on the MAC address. By
default, the unit with the highest MAC address becomes the master; the unit with the second highest
MAC address becomes the standby.
Installing the Hardware
17