Wired Intelligent Edge

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

According to the VSF Guide, the 6100 can run VSF over the 10G ports.

Starting CX 10.16, there is also auto-stacking, where if you use the default VSF ports, you factory default the secondary switch and it will automatically add to the stack. Did that yesterday on 6200F and worked like a charm, where before I had some issues setting it up manually (but without really reading the guides ;-)).

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

In the guide, it is stated that Auto-Stacking is available on ports 13 and 14.

According to the VSF Guide, the 6100 can run VSF over the 10G ports.

Starting CX 10.16, there is also auto-stacking, where if you use the default VSF ports, you factory default the secondary switch and it will automatically add to the stack. Did that yesterday on 6200F and worked like a charm, where before I had some issues setting it up manually (but without really reading the guides ;-)).

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

Unfortunately, I don't have original HP transceivers/DAC cables at my company. It turned out the issue was with the DAC cables - the switch detected them, but didn't use them to create the stack, even though they were factory-programmed for HP/Aruba. 
Instead, I used 10G multimode transceivers programmed for Aruba, and the switches were able to create the VSF without any issues.

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?

The switch shows that the working transceivers have part number 1990-3878, while the non-working DAC cable had part number 1990-4065.

Both the transceivers and the DAC cable show product number J9150A and type 10G-SR.

Unfortunately, I don't have original HP transceivers/DAC cables at my company. It turned out the issue was with the DAC cables - the switch detected them, but didn't use them to create the stack, even though they were factory-programmed for HP/Aruba. 
Instead, I used 10G multimode transceivers programmed for Aruba, and the switches were able to create the VSF without any issues.

Hi, I have two Aruba 6100 JL679A switches. I am trying to create a VSF stack in a chain topology using a 10G DAC cable, but without success.

If I use only the Ethernet ports 1/1/13 and 1/1/14, the stack works correctly, but the VSF connection is limited to 1G speed.

However, if I use the SFP ports 1/1/15 and 1/1/16, the stack does not form - the switches do not connect, as if they cannot detect each other. On member 2, after running the command vsf renumber-to 2, the switch restarts, an error occurs, and it enters recovery mode.

Switch 1:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

Switch 2:

vsf member 1

link 1 1/1/16

link 2 1/1/15

exit

vsf renumber-to 2

After that, an error appears on switch 2:

kexec_core: Starting new kernel
System is initializing
Created symlink /etc/systemd/system/bannerd.service -> /dev/null.
Warning: The unit file, source configuration file or drop-ins of bannerd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
fips_post_check[3600]: FIPS_POST: Cryptographic selftest started...SUCCESS

recovery-2# 

Firmware version on my switches:

6100# show images 
---------------------------------------------------------------------------
AOS-CX Primary Image
---------------------------------------------------------------------------
Version : PL.10.16.1030                 
Size    : 274 MB                        
Date    : 2026-02-18 19:16:04 UTC       
SHA-256 : 8efbda918f0fece54f79969fa6cc52615613d905bb6c07e415bad25d8a8f7cb1   

Is it possible to build a VSF stack with 10G speed on the 6100 JL679A model?