MODBUS TCP Registers

This appendix lists the CGS-2520-specific read-only registers. MODBUS clients use them to communicate with a MODBUS server (the switch). There are no writable registers. For information about MODBUS TCP, see Chapter5, “Configuring MODBUS TCP”

System Information Registers

Memory address spaces 0x0800 through 0x0FFF are system information registers. Clients use the 0x03 Read Multiple Registers MODBUS function code.

 

Table C-1 System Information Registers

Address
Number of Registers
Description
R/W
Format
Example
CLI 1 Command

0800

64

Product ID

R

Text

“CGS-2520-24TC

show version
 user EXEC command

0840

64

Software image name

R

Text

“CGS2520-IPSERVICES-M”

0880

64

Software image version

R

Text

“12.2(0.0.62)EX”

08C0

64

Host name

R

Text

“CGS2520”

show running-config
 privileged EXEC command

0900

64

Alarm 1 description

R

Text

“Door 1”

show env alarm-contact
 user EXEC command

0940

64

Alarm 2 description

R

Text

“Door 2”

0980

64

Alarm 3 description

R

Text

“Door 3”

09C0

64

Alarm 4 description

R

Text

“Door 4”

0A00

1

Alarm 1 status

R

Uint16

0x1

0A01

1

Alarm 2 status

R

Uint16

0x0

0A02

1

Alarm 3 status

R

Uint16

0x0

0A03

1

Alarm 4 status

R

Uint16

0x0

0A04

1

Total number of 10/100 Ethernet ports

R

Uint16

0x18

show version
 user EXEC command

0A05

1

Total number of Gigabit Ethernet ports

R

Uint16

0x2

0A06

1

Total number of alarms

R

Uint16

0x4

show env alarm-contact
 user EXEC command

0A07

1

Total number of power supplies

R

Uint16

0x2

show env power
 user EXEC command

0A08

1

PS1 status

R

Uint16

0x0

0A09

1

PS2 status

R

Uint16

0x2

0A0A

1

System temperature
(in Celsius)

R

Uint16

38

show env temperature
 user EXEC command

1.Command-line interface

 

Table C-2 System Information: Interpretation of Uint16 Values

Address
Description
Value

0A00

Alarm 1 status

0x0: Alarm not asserted

0x1: Alarm asserted

0A01

Alarm 2 status

0A02

Alarm 3 status

0A03

Alarm 4 status

0A08

Power supply 1 status

0x0: PS is functional
0x1: PS is not functional
0x2: PS is not present
0x3: PS is not recognized

0A09

Power supply 2 status

Port Information Registers

Port Information Registers with 64-Bit Interface Counters

Memory address spaces 0x1000 through 0x2FFF are interface registers. Clients use the 0x03 Read Multiple Registers MODBUS function code to access the registers. See the “Port Information for 64-Bit Counters” section for an explanation of the values for the Uint16 and local port number (LPN)-to-interface mapping.

 

Table C-3 Port Information Registers, 64-Bit Interface Counters

Address
Number of Registers
Description
R/W
Format

1000

64

Port 1 name

R

Text

1040

64

Port 2 name

R

Text

1080

64

Port 3 name

R

Text

10C0

64

Port 4 name

R

Text

1100

64

Port 5 name

R

Text

1140

64

Port 6 name

R

Text

1180

64

Port 7 name

R

Text

11C0

64

Port 8 name

R

Text

1200

64

Port 9 name

R

Text

1240

64

Port 10 name

R

Text

1280

64

Port 11 name

R

Text

12C0

64

Port 12 name

R

Text

1300

64

Port 13 name

R

Text

1340

64

Port 14 name

R

Text

1380

64

Port 15 name

R

Text

13C0

64

Port 16 name

R

Text

1400

64

Port 17 name

R

Text

1440

64

Port 18 name

R

Text

1480

64

Port 19 name

R

Text

14C0

64

Port 20 name

R

Text

1500

64

Port 21 name

R

Text

1540

64

Port 22 name

R

Text

1580

64

Port 23 name

R

Text

15C0

64

Port 24 name

R

Text

1600

64

Port 25 name

R

Text

1640

64

Port 26 state

R

Text

1680

1

Port 1 state

R

Uint16

1681

1

Port 2 state

R

Uint16

1682

1

Port 3 state

R

Uint16

1683

1

Port 4 state

R

Uint16

1684

1

Port 5 state

R

Uint16

1685

1

Port 6 state

R

Uint16

1686

1

Port 7 state

R

Uint16

1687

1

Port 8 state

R

Uint16

1688

1

Port 9 state

R

Uint16

1689

1

Port 10 state

R

Uint16

168A

1

Port 11 state

R

Uint16

168B

1

Port 12 state

R

Uint16

168C

1

Port 13 state

R

Uint16

168D

1

Port 14 state

R

Uint16

168E

1

Port 15 state

R

Uint16

168F

1

Port 16 state

R

Uint16

1690

1

Port 17 state

R

Uint16

1691

1

Port 18 state

R

Uint16

1692

1

Port 19 state

R

Uint16

1693

1

Port 20 state

R

Uint16

1694

1

Port 21 state

R

Uint16

1695

1

Port 22 state

R

Uint16

1696

1

Port 23 state

R

Uint16

1697

1

Port 24 state

R

Uint16

1698

1

Port 25 state

R

Uint16

1699

1

Port 26 state

R

Uint16

169A

4

Port 1 statistics, number of packets received

R

Uint64

169E

4

Port 2 statistics, number of packets received

R

Uint64

16A2

4

Port 3 statistics, number of packets received

R

Uint64

16A6

4

Port 4 statistics, number of packets received

R

Uint64

16AA

4

Port 5 statistics, number of packets received

R

Uint64

16AE

4

Port 6 statistics, number of packets received

R

Uint64

16B2

4

Port 7 statistics, number of packets received

R

Uint64

16B6

4

Port 8 statistics, number of packets received

R

Uint64

16BA

4

Port 9 statistics, number of packets received

R

Uint64

16BE

4

Port 10 statistics, number of packets received

R

Uint64

16C2

4

Port 11 statistics, number of packets received

R

Uint64

16C6

4

Port 12 statistics, number of packets received

R

Uint64

16CA

4

Port 13 statistics, number of packets received

R

Uint64

16CE

4

Port 14 statistics, number of packets received

R

Uint64

16D2

4

Port 15 statistics, number of packets received

R

Uint64

16D6

4

Port 16 statistics, number of packets received

R

Uint64

16DA

4

Port 17 statistics, number of packets received

R

Uint64

16DE

4

Port 18 statistics, number of packets received

R

Uint64

16E2

4

Port 19 statistics, number of packets received

R

Uint64

16E6

4

Port 20 statistics, number of packets received

R

Uint64

16EA

4

Port 21 statistics, number of packets received

R

Uint64

16EE

4

Port 22 statistics, number of packets received

R

Uint64

16F2

4

Port 23 statistics, number of packets received

R

Uint64

16F6

4

Port 24 statistics, number of packets received

R

Uint64

16FA

4

Port 25 statistics, number of packets received

R

Uint64

16FE

4

Port 26 statistics, number of packets received

R

Uint64

1702

4

Port 1 statistics, number of packets sent

R

Uint64

1706

4

Port 2 statistics, number of packets sent

R

Uint64

170A

4

Port 3 statistics, number of packets sent

R

Uint64

170E

4

Port 4 statistics, number of packets sent

R

Uint64

1712

4

Port 5 statistics, number of packets sent

R

Uint64

1716

4

Port 6 statistics, number of packets sent

R

Uint64

171A

4

Port 7 statistics, number of packets sent

R

Uint64

171E

4

Port 8 statistics, number of packets sent

R

Uint64

1722

4

Port 9 statistics, number of packets sent

R

Uint64

1726

4

Port 10 statistics, number of packets sent

R

Uint64

172A

4

Port 11 statistics, number of packets sent

R

Uint64

172E

4

Port 12 statistics, number of packets sent

R

Uint64

1732

4

Port 13 statistics, number of packets sent

R

Uint64

1736

4

Port 14 statistics, number of packets sent

R

Uint64

173A

4

Port 15 statistics, number of packets sent

R

Uint64

173E

4

Port 16 statistics, number of packets sent

R

Uint64

1742

4

Port 17 statistics, number of packets sent

R

Uint64

1746

4

Port 18 statistics, number of packets sent

R

Uint64

174A

4

Port 19 statistics, number of packets sent

R

Uint64

174E

4

Port 20 statistics, number of packets sent

R

Uint64

1752

4

Port 21 statistics, number of packets sent

R

Uint64

1756

4

Port 22 statistics, number of packets sent

R

Uint64

175A

4

Port 23 statistics, number of packets sent

R

Uint64

175E

4

Port 24 statistics, number of packets sent

R

Uint64

1762

4

Port 25 statistics, number of packets sent

R

Uint64

1766

4

Port 26 statistics, number of packets sent

R

Uint64

176A

4

Port 1 statistics, number of bytes received

R

Uint64

176E

4

Port 2 statistics, number of bytes received

R

Uint64

1772

4

Port 3 statistics, number of bytes received

R

Uint64

1776

4

Port 4 statistics, number of bytes received

R

Uint64

177A

4

Port 5 statistics, number of bytes received

R

Uint64

177E

4

Port 6 statistics, number of bytes received

R

Uint64

1782

4

Port 7 statistics, number of bytes received

R

Uint64

1786

4

Port 8 statistics, number of bytes received

R

Uint64

178A

4

Port 9 statistics, number of bytes received

R

Uint64

178E

4

Port 10 statistics, number of bytes received

R

Uint64

1792

4

Port 11 statistics, number of bytes received

R

Uint64

1796

4

Port 12 statistics, number of bytes received

R

Uint64

179A

4

Port 13 statistics, number of bytes received

R

Uint64

179E

4

Port 14 statistics, number of bytes received

R

Uint64

17A2

4

Port 15 statistics, number of bytes received

R

Uint64

17A6

4

Port 16 statistics, number of bytes received

R

Uint64

17AA

4

Port 17 statistics, number of bytes received

R

Uint64

17AE

4

Port 18 statistics, number of bytes received

R

Uint64

17B2

4

Port 19 statistics, number of bytes received

R

Uint64

17B6

4

Port 20 statistics, number of bytes received

R

Uint64

17BA

4

Port 21 statistics, number of bytes received

R

Uint64

17BE

4

Port 22 statistics, number of bytes received

R

Uint64

17C2

4

Port 23 statistics, number of bytes received

R

Uint64

17C6

4

Port 24 statistics, number of bytes received

R

Uint64

17CA

4

Port 25 statistics, number of bytes received

R

Uint64

17CE

4

Port 26 statistics, number of bytes received

R

Uint64

17D2

4

Port 1 statistics, number of bytes sent

R

Uint64

17D6

4

Port 2 statistics, number of bytes sent

R

Uint64

17DA

4

Port 3 statistics, number of bytes sent

R

Uint64

17DE

4

Port 4 statistics, number of bytes sent

R

Uint64

17E2

4

Port 5 statistics, number of bytes sent

R

Uint64

17E6

4

Port 6 statistics, number of bytes sent

R

Uint64

17EA

4

Port 7 statistics, number of bytes sent

R

Uint64

17EE

4

Port 8 statistics, number of bytes sent

R

Uint64

17F2

4

Port 9 statistics, number of bytes sent

R

Uint64

17F6

4

Port 10 statistics, number of bytes sent

R

Uint64

17FA

4

Port 11 statistics, number of bytes sent

R

Uint64

17FE

4

Port 12 statistics, number of bytes sent

R

Uint64

1802

4

Port 13 statistics, number of bytes sent

R

Uint64

1806

4

Port 14 statistics, number of bytes sent

R

Uint64

180A

4

Port 15 statistics, number of bytes sent

R

Uint64

180E

4

Port 16 statistics, number of bytes sent

R

Uint64

1812

4

Port 17 statistics, number of bytes sent

R

Uint64

1816

4

Port 18 statistics, number of bytes sent

R

Uint64

181A

4

Port 19 statistics, number of bytes sent

R

Uint64

181E

4

Port 20 statistics, number of bytes sent

R

Uint64

1822

4

Port 21 statistics, number of bytes sent

R

Uint64

1826

4

Port 22 statistics, number of bytes sent

R

Uint64

182A

4

Port 23 statistics, number of bytes sent

R

Uint64

182E

4

Port 24 statistics, number of bytes sent

R

Uint64

1832

4

Port 25 statistics, number of bytes sent

R

Uint64

1836

4

Port 26 statistics, number of bytes sent

R

Uint64

Port Information for 64-Bit Counters

 

Table C-4 Port Information: Interpretation of Uint16 Values

Address
Description
Value

 

0x1680

to

0x1699

 

Port 1 state

to

Port 26 state

The upper byte represents the interface state:

  • 0x0: Interface is down
  • 0x1: Interface is going down
  • 0x2: Interface is in the initializing state
  • 0x3: Interface is coming up
  • 0x4: Interface is up and running
  • 0x5: Interface is reset by the user
  • 0x6: Interface is shut down by the user
  • 0x7: Interface is being deleted

The lower byte represents the line protocol state:

  • 0x1: Line protocol state is up
  • 0x0: Line protocol state is down

 

Table C-5 Interface-to-LPN Mapping

Interface
LPN

Fast Ethernet 0/1

1

Fast Ethernet 0/2

2

Fast Ethernet 0/3

3

Fast Ethernet 0/4

4

Fast Ethernet 0/5

5

Fast Ethernet 0/6

6

Fast Ethernet 0/7

7

Fast Ethernet 0/8

8

Fast Ethernet 0/9

9

Fast Ethernet 0/10

10

Fast Ethernet 0/11

11

Fast Ethernet 0/12

12

Fast Ethernet 0/13

13

Fast Ethernet 0/14

14

Fast Ethernet 0/15

15

Fast Ethernet 0/16

16

Fast Ethernet 0/17

17

Fast Ethernet 0/18

18

Fast Ethernet 0/19

19

Fast Ethernet 0/20

20

Fast Ethernet 0/21

21

Fast Ethernet 0/22

22

Fast Ethernet 0/23

23

Fast Ethernet 0/24

24

Gigabit Ethernet 0/1

25

Gigabit Ethernet 0/2

26

Port Information Registers with 32-Bit Interface Counters

The counter registers for the 32-bit interface counters are mapped to the lower 32-bits of the 64-bit interface counters. See the “Port Information for 64-Bit Counters” section for an explanation of the values of the local port number (LPN)-to-interface mapping.

 

Table C-6 Port Information Registers, 32-Bit Interface Counters

Address
Number of Registers
Description
R/W
Format

183A

2

Port 1 statistics, number of packets received

R

Uint32

183C

2

Port 2 statistics, number of packets received

R

Uint32

183E

2

Port 3 statistics, number of packets received

R

Uint32

1840

2

Port 4 statistics, number of packets received

R

Uint32

1842

2

Port 5 statistics, number of packets received

R

Uint32

1844

2

Port 6 statistics, number of packets received

R

Uint32

1846

2

Port 7 statistics, number of packets received

R

Uint32

1848

2

Port 8 statistics, number of packets received

R

Uint32

184A

2

Port 9 statistics, number of packets received

R

Uint32

184C

2

Port 10 statistics, number of packets received

R

Uint32

184E

2

Port 11 statistics, number of packets received

R

Uint32

1850

2

Port 12 statistics, number of packets received

R

Uint32

1852

2

Port 13 statistics, number of packets received

R

Uint32

1854

2

Port 14 statistics, number of packets received

R

Uint32

1856

2

Port 15 statistics, number of packets received

R

Uint32

1858

2

Port 16 statistics, number of packets received

R

Uint32

185A

2

Port 17 statistics, number of packets received

R

Uint32

185C

2

Port 18 statistics, number of packets received

R

Uint32

185E

2

Port 19 statistics, number of packets received

R

Uint32

1860

2

Port 20 statistics, number of packets received

R

Uint32

1862

2

Port 21 statistics, number of packets received

R

Uint32

1864

2

Port 22 statistics, number of packets received

R

Uint32

1866

2

Port 23 statistics, number of packets received

R

Uint32

1868

2

Port 24 statistics, number of packets received

R

Uint32

186A

2

Port 25 statistics, number of packets received

R

Uint32

186C

2

Port 26 statistics, number of packets received

R

Uint32

186E

2

Port 1 statistics, number of packets sent

R

Uint32

1870

2

Port 2 statistics, number of packets sent

R

Uint32

1872

2

Port 3 statistics, number of packets sent

R

Uint32

1874

2

Port 4 statistics, number of packets sent

R

Uint32

1876

2

Port 5 statistics, number of packets sent

R

Uint32

1878

2

Port 6 statistics, number of packets sent

R

Uint32

187A

2

Port 7 statistics, number of packets sent

R

Uint32

187C

2

Port 8 statistics, number of packets sent

R

Uint32

187E

2

Port 9 statistics, number of packets sent

R

Uint32

1880

2

Port 10 statistics, number of packets sent

R

Uint32

1882

2

Port 11 statistics, number of packets sent

R

Uint32

1884

2

Port 12 statistics, number of packets sent

R

Uint32

1886

2

Port 13 statistics, number of packets sent

R

Uint32

1888

2

Port 14 statistics, number of packets sent

R

Uint32

188A

2

Port 15 statistics, number of packets sent

R

Uint32

188C

2

Port 16 statistics, number of packets sent

R

Uint32

188E

2

Port 17 statistics, number of packets sent

R

Uint32

1890

2

Port 18 statistics, number of packets sent

R

Uint32

1892

2

Port 19 statistics, number of packets sent

R

Uint32

1894

2

Port 20 statistics, number of packets sent

R

Uint32

1896

2

Port 21 statistics, number of packets sent

R

Uint32

1898

2

Port 22 statistics, number of packets sent

R

Uint32

189A

2

Port 23 statistics, number of packets sent

R

Uint32

189C

2

Port 24 statistics, number of packets sent

R

Uint32

189E

2

Port 25 statistics, number of packets sent

R

Uint32

18A0

2

Port 26 statistics, number of packets sent

R

Uint32

18A2

2

Port 1 statistics, number of bytes received

R

Uint32

18A4

2

Port 2 statistics, number of bytes received

R

Uint32

18A6

2

Port 3 statistics, number of bytes received

R

Uint32

18A8

2

Port 4 statistics, number of bytes received

R

Uint32

18AA

2

Port 5 statistics, number of bytes received

R

Uint32

18AC

2

Port 6 statistics, number of bytes received

R

Uint32

18AE

2

Port 7 statistics, number of bytes received

R

Uint32

18B0

2

Port 8 statistics, number of bytes received

R

Uint32

18B2

2

Port 9 statistics, number of bytes received

R

Uint32

18B4

2

Port 10 statistics, number of bytes received

R

Uint32

18B6

2

Port 11 statistics, number of bytes received

R

Uint32

18B8

2

Port 12 statistics, number of bytes received

R

Uint32

18BA

2

Port 13 statistics, number of bytes received

R

Uint32

18BC

2

Port 14 statistics, number of bytes received

R

Uint32

18BE

2

Port 15 statistics, number of bytes received

R

Uint32

18C0

2

Port 16 statistics, number of bytes received

R

Uint32

18C2

2

Port 17 statistics, number of bytes received

R

Uint32

18C4

2

Port 18 statistics, number of bytes received

R

Uint32

18C6

2

Port 19 statistics, number of bytes received

R

Uint32

18C8

2

Port 20 statistics, number of bytes received

R

Uint32

18CA

2

Port 21 statistics, number of bytes received

R

Uint32

18CC

2

Port 22 statistics, number of bytes received

R

Uint32

18CE

2

Port 23 statistics, number of bytes received

R

Uint32

18D0

2

Port 24 statistics, number of bytes received

R

Uint32

18D2

2

Port 25 statistics, number of bytes received

R

Uint32

18D4

2

Port 26 statistics, number of bytes received

R

Uint32

18D6

2

Port 1 statistics, number of bytes sent

R

Uint32

18D8

2

Port 2 statistics, number of bytes sent

R

Uint32

18DA

2

Port 3 statistics, number of bytes sent

R

Uint32

18DC

2

Port 4 statistics, number of bytes sent

R

Uint32

18DE

2

Port 5 statistics, number of bytes sent

R

Uint32

18E0

2

Port 6 statistics, number of bytes sent

R

Uint32

18E2

2

Port 7 statistics, number of bytes sent

R

Uint32

18E4

2

Port 8 statistics, number of bytes sent

R

Uint32

18E6

2

Port 9 statistics, number of bytes sent

R

Uint32

18E8

2

Port 10 statistics, number of bytes sent

R

Uint32

18EA

2

Port 11 statistics, number of bytes sent

R

Uint32

18EC

2

Port 12 statistics, number of bytes sent

R

Uint32

18EE

2

Port 13 statistics, number of bytes sent

R

Uint32

18F0

2

Port 14 statistics, number of bytes sent

R

Uint32

18F2

2

Port 15 statistics, number of bytes sent

R

Uint32

18F4

2

Port 16 statistics, number of bytes sent

R

Uint32

18F6

2

Port 17 statistics, number of bytes sent

R

Uint32

18F8

2

Port 18 statistics, number of bytes sent

R

Uint32

18FA

2

Port 19 statistics, number of bytes sent

R

Uint32

18FC

2

Port 20 statistics, number of bytes sent

R

Uint32

18FE

2

Port 21 statistics, number of bytes sent

R

Uint32

1900

2

Port 22 statistics, number of bytes sent

R

Uint32

1902

2

Port 23 statistics, number of bytes sent

R

Uint32

1904

2

Port 24 statistics, number of bytes sent

R

Uint32

1906

2

Port 25 statistics, number of bytes sent

R

Uint32

1908

2

Port 26 statistics, number of bytes sent

R

Uint32