topic Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working in ExtremeSwitching (VSP/Fabric Engine)

VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

RobertD1 — Wed, 22 May 2024 14:44:15 GMT

Hello,

Tried initially with 1G SFP and fibre at both ends and link does not come up. Cannot disable auto-negotiate on Cisco 1G SFP (IOS version does not support it). So, link does not work because auto-negotiation is disabled when insert a 1G SFP into the Extreme 7400 port.

We then tried with a 1000BaseT copper transceiver and a straight cable but the link did not come up. The Extreme side shows the port is using auto-negotiation so we configured the Cisco end to auto-negotiate but the link is down.

Not sure if the 1000BaseT copper module used in 7400 port supports Auto MDI-X? Do we need to use a crossover cable?

show int gig l1-config 1/42
************************************************************************************
Command Execution Time: Wed May 22 11:35:49 2024 BST
************************************************************************************
==================================================================================================================================
Port Config L1
==================================================================================================================================
PORT AUTO OPERATE CUSTOM AUTO NEGOTIATION CANA ADMIN OPERATE ADMIN OPERATE
NUM NEG. AUTO-NEG ADVERTISEMENTS ORIGIN DPLX SPD DPLX SPD TX-FLW-CTRL TX-FLW-CTRL
----------------------------------------------------------------------------------------------------------------------------------
1/42 true true 10000F 25000F CONFIG full 25000 full 1000 disable disable

Anyone managed to get a 1G copper connection from Extreme 7400-48Y-8C to Cisco Catalyst switch working?

Rob

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

akrohn — Wed, 22 May 2024 14:06:11 GMT

Hello Rob,

which of this copper modules do you use ?

https://optics.extremenetworks.com/VSP/Model/VSP740048Y/Copper/Bitrate/1G/

The only limitations I found are :

1G Limitations

-No support for Auto-Negotiation

-The system does not support auto-negotiation when the port is operating at 1G

-Console Informational Log Message:

Auto-Negotiation enabled but not applied to port 1/1 since 1G transceiver is present

-No support for Remote Fault Indication (RFI). RFI requires Auto-Negotiation which is not supported.

-No support for TX Pause Frames

-Receive pause frames are honored

Not capable of generating Tx Pause Frames

You can check this easy.

Connect a pc with fix 1000base-t settings with a normal cat cable to the switch.

When you get a link, you know the cable type.

Best regards

Andreas

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

RobertD1 — Wed, 22 May 2024 14:32:33 GMT

Hi Andreas,

Thanks for your reply. It is an Extreme Gbic1000BaseT (compatible with 10070H). The configured and operating auto-negotiate setting is True. Even though it is showing auto-negotiate true it is not negotiating. We are going to try with a crossover cable next. Nothing in log to say anything about Auto-Negotiation being enabled and not applied. I did try disabling auto-negotiation but the operating setting remained True when the Cisco side was fixed but no joy. It would be good to understand if MDIX is supported on pluggable modules so we know we need to change the cable.

Thanks,

Rob

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

WillyHe — Wed, 22 May 2024 15:08:58 GMT

See "https://documentation.extremenetworks.com/pluggable/GUID-768962A7-424B-424A-9FB2-DDFBFF5364DE.shtml"

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

RobertD1 — Wed, 22 May 2024 16:56:52 GMT

Do I need to configure the port to advertise full 1000?

show int gig l1-config 1/42
************************************************************************************
Command Execution Time: Wed May 22 17:47:01 2024 BST
************************************************************************************
==================================================================================================================================
Port Config L1
==================================================================================================================================
PORT AUTO OPERATE CUSTOM AUTO NEGOTIATION CANA ADMIN OPERATE ADMIN OPERATE
NUM NEG. AUTO-NEG ADVERTISEMENTS ORIGIN DPLX SPD DPLX SPD TX-FLW-CTRL TX-FLW-CTRL
----------------------------------------------------------------------------------------------------------------------------------
1/42 true true 10000F 25000F CONFIG full 25000 full 1000 disable disable

auto-negotiation-advertisements ?
10-full Advertise 10mbps full duplex
10-half Advertise 10mbps half duplex
100-full Advertise 100mbps full duplex
100-half Advertise 100mbps half duplex
1000-full Advertise 1000mbps full duplex
10000-full Advertisement 10Gbps full duplex
2500-full Advertise 2.5Gbps full duplex
25000-full Advertisement 25Gbps full duplex
5000-full Advertise 5Gbps full duplex
none Set to none
port Port(s) which are to be changed

Edit: Not supported!

auto-negotiation-advertisements 1000-full
Error: port 1/42, Custom Auto Negotiation Advertisements are not supported

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

RobertD1 — Fri, 24 May 2024 08:20:02 GMT

It might be because the 7400 uses a phy-less design and Auto-MDIX is not able to detect the cabling. Will see if a cross-over cable works.

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

WillyHe — Fri, 24 May 2024 14:36:29 GMT

This link should work, its the same but not.
https://documentation.extremenetworks.com/pluggable/GUID-768962A7-424B-424A-9FB2-DDFBFF5364DE.shtml

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

RobertD1 — Tue, 11 Jun 2024 16:16:29 GMT

Just updating this post to let people know it is now working after a reboot of the Cisco switch. We suspected the Cisco because even a local PC failed to connect to it in a simple access mode configuration. Local engineer felt a reboot would clear the issue as he had seen this behaviour before where after a period of up time a port goes down and up again it fails to work. After rebooting can now connect a PC or connect it to another switch. Nothing to do with the Extreme side. The link works at 1G with auto-negotiate enabled.

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

WillyHe — Wed, 12 Jun 2024 14:02:45 GMT

Maybe a good idea to replace the Cisco by an EXTREME switch 🙂

Re: VSP-7400-48Y-8C (8.8.3.0) to Cisco WS-C3750X-24S-S 1G Not Working

EXTR_Paul — Wed, 19 Jun 2024 12:48:38 GMT

This is a common problem in switches that are PHYless, like the VSP7400. When you put a 1GE transceiver into a SFP+ or SPF28 port, the port doesn't know what speed to set itself at.

Try these three things

1-. Disable auto-negotiation on the cisco side port. leave auto-neg enabled on the Extreme side

2- Do the opposite. Disable auto-neg on the VSP7400 port. Enable auto-neg on the Cisco.

3- Disable auto-neg on both sides.

One of those three scenarios will work.