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AS7326-56X - Troubleshoot for switch port link problems Follow

ann302_chung 鍾雅安

August 23, 2024 12:42
Updated

Purpose :

This article describes how to check the hardware portion for troubleshooting switch ports cannot link up problems.

Model :

AS7326-56X

Procedure :

Step-1 Please make sure your network cable is good first

Step-2 Please power cycle the switch and boot into the ACCTON-DIAG for troubleshooting

Step-3 Enter the command to set port speed

Set the port speed to 25G and 100G on the uplink ports.

root@(none):/# swutil -C -r 48x25+8x100
switch config mode: 48x25+8x100

If you want to test with port speeds 10G and 40G, please execute the "swutil -C -r 48x10+8x40".

Step-4 Setup the environment for specific ports

For example:

Use a pair of 25G transceivers to connect port1 and port2.
Use a pair of 100G transceivers to connect port51 and port52.
Use a pair of 10G transceivers to connect the last 10G ports.

Step-5 Enter the command to check port status

Basically, plugging those cables and transceivers does not require additional settings, the ports will link up directly if everything is properly.

The port mapping as below :

xe0~xe47 is physical port1~port48
ce0~ce7 is physical port49~port54
xe48~xe49 is physical 10G

root@(none):/# swutil ps
ena/ speed/ link auto STP lrn inter max cut loop
port link Lns duplex scan neg? state pause discrd ops face frame thru? back
xe0( 3) up 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe1( 2) up 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe2( 4) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe3( 8) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe4( 7) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe5( 1) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
<omit>
xe46( 74) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe47( 72) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
ce0( 79) down 4 100G FD SW No Forward TX RX None FA CAUI4 9412 No
ce1( 87) down 4 100G FD SW No Forward TX RX None FA CAUI4 9412 No
ce2( 95) up 4 100G FD SW No Forward TX RX None FA CAUI4 9412 No
ce3( 99) up 4 100G FD SW No Forward TX RX None FA CAUI4 9412 No
ce4(107) down 4 100G FD SW No Forward TX RX None FA CAUI4 9412 No
<omit>
xe48( 66) up 1 10G FD SW No Forward TX RX None FA SFI 9412 No
xe49(130) up 1 10G FD SW No Forward TX RX None FA SFI 9412 No

If the fiber ports CANNOT link up, please refer to step-6 for debugging.

Step-6 Check the fiber port

There are four items need to be checked here.

Dump the EEPROM of the transceiver
Please use the command "trcv-dev [Port number] eeprom" to dump the EEPROM of the transceiver according to the port you used.
*AS7326-56X has a total of 56 fiber ports, the [Port number] starts from 0 to 55.
*The switch should be able to read EEPROM information properly.

root@(none):/# trcv-dev 50 eeprom
QSFP3[50]: 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 11 07 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ???.............
10: 00 00 00 00 00 00 1b 00 00 00 7c 10 00 00 00 00 ......?...|?....
20: 00 00 2a 0c 2a 0c 2a 0c 2a 0c 0a ea 0a e6 0a fa ..*?*?*?*???????
30: 0a f0 22 5d 22 50 22 8f 22 70 00 00 00 00 00 00 ??"]"P"?"p......
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 11 c0 23 80 00 00 00 00 00 00 00 05 ff 00 00 00 ??#?.......?....
90: 00 00 03 00 45 64 67 65 63 6f 72 65 20 20 20 20 ..?.Edgecore
a0: 20 20 20 20 00 70 72 cf 45 54 37 34 30 32 2d 31 .pr?ET7402-1
b0: 30 30 41 4f 43 2d 33 4d 30 31 00 00 00 00 46 95 00AOC-3M01....F?
c0: 01 07 ff de 4a 31 31 38 34 30 30 30 34 30 34 30 ??.?J11840004040
d0: 20 20 20 20 31 35 30 37 31 33 20 20 00 00 68 ae 150713 ..h?
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Check the "pre-emphasis" and "link training"
If you are using optical transceiver or AOC cable, then there is no additional settings are required here. By default, our DIAG already loaded the "pre-emphasis" accordingly.
If you are using the DAC cable, please enable the "link training" function.
The following command is used to enable the "link training" function:
```
root@(none):/# swutil phy control ce LT=1
Current PHY control settings of ce0 ->
Preemphasis = 0x14410a
DriverCurrent = 0xffffffff
DFE ENable = True
LP DFE ENable = True
BR DFE ENable = False
LinkTraining Enable = True
Interface = 0x3e
<omit>
```

Regarding the SFP28 25G port, please check the "TX_disable" setting.
(By default is enabled.)
Use "trcv-dev 0-47 txdis" to check the current setting. "yes" means enabled.

root@(none):/# trcv-dev 0-47 txdis
SFP1[0]: yes
SFP2[1]: yes
SFP3[2]: yes
SFP4[3]: yes
SFP5[4]: yes
SFP6[5]: yes
SFP7[6]: yes
SFP8[7]: yes
SFP9[8]: yes
SFP10[9]: yes
SFP11[10]: yes
<omit>

"No" means disabled.

root@(none):/# trcv-dev 0-47 txdis
SFP1[0]: no
SFP2[1]: no
SFP3[2]: no
SFP4[3]: no
SFP5[4]: no
SFP6[5]: no
SFP7[6]: no
SFP8[7]: no
SFP9[8]: no
SFP10[9]: no
SFP11[10]: no

If it is disabled, please use "trcv-dev 0-47 txdis 1" to enabled.

root@(none):/# trcv-dev 0-47 txdis 1
SFP1[0]:
SFP2[1]:
SFP3[2]:
SFP4[3]:
SFP5[4]:
SFP6[5]:
SFP7[6]:
SFP8[7]:
SFP9[8]:
SFP10[9]:
SFP11[10]:
<omit>

After that, please check the port status if it will link up or not.

root@(none):/# swutil ps xe0-xe5
ena/ speed/ link auto STP lrn inter max cut loop
port link Lns duplex scan neg? state pause discrd ops face frame thru? back
xe0( 3) up 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe1( 2) up 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe2( 4) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe3( 8) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe4( 7) down 1 25G FD SW No Forward TX RX None FA CR 9412 No
xe5( 1) down 1 25G FD SW No Forward TX RX None FA CR 9412 No

Regarding the LP mode(Low Power mode) of the QSFP28 100G port, in the AS7326-56X design, the PIN of lp mode is always low, which remains high power.
If the optical module still cannot be linked up, we suggest replacing the QSFP.
Regarding the last 10G port, our AS7326-56X is using Broadwell D-1518 CPU, so this unit doesn't support MAC to CPU but supports MAC to front ports.
In our ACCTON-DIAG, no additional settings are required, it will be linked by default.

Regarding the 25G port down the speed to 10G, according to hardware limitations, it needs to use speed 10G must change the speed port group at a time.
Please run the command "swutil phy info" and check the name item to know what a core index for 4 front ports of the port group.
Example:
Group-1, TSCF-16/00 use xe0,xe1,xe2 and xe5
Group-2, TSCF-16/01 use xe3,xe4,xe6 and xe8

root@(none):/# swutil phy info
Phy mapping dump:
port   id0   id1  addr iaddr                    name           timeout
xe0(  3)  600d  8770    81    81            TSCF-16/00/2     250000
xe1(  2)  600d  8770    81    81            TSCF-16/00/1    250000
xe2(  4)  600d  8770    81    81            TSCF-16/00/3     250000
xe3(  8)  600d  8770    85    85            TSCF-16/01/3     250000
xe4(  7)  600d  8770    85    85            TSCF-16/01/2     250000
xe5(  1)  600d  8770    81    81            TSCF-16/00/0     250000
xe6(  5)  600d  8770    85    85            TSCF-16/01/0     250000
xe7( 16)  600d  8770    8d    8d            TSCF-16/03/3     250000
xe8(  6)  600d  8770    85    85            TSCF-16/01/1     250000

If the above items are checked, but the fiber port still cannot be linked up, please save all logs of the above test and submit the ticket to Edgecore Support.

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AS7326-56X - Troubleshoot for switch port link problems Follow

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Edgecore Networks Corporation

END USER LICENSE AGREEMENT

1) Trademarks:

2) License grant:

3) Open Source Software:

4) Ownership and Copyright:

5) Unauthorized Use:

6) No Warranties:

7) Limited Liability:

8) Compliance with laws:

9) Termination:

10) Governing Law and Jurisdiction:

11) General:

Category

Purpose :

Model :

Procedure :

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