How can I adjust the SonicWall UTM appliance's ethernet Interface duplex speed?

10/14/2021 57 People found this article helpful 107,923 Views

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Description

It may be desirable or necessary to manually adjust Ethernet settings in situations including, but not limited to the following:

• You are unable to establish a connection with a cable modem or upstream router despite correct cabling.
• Performance is unacceptable for LAN users behind the SonicWall appliance accessing the Internet.
• Compatibility issues may exist with certain Ethernet devices necessitating forced or hard coded settings.

CAUTION: If you select a specific Ethernet speed and duplex, you must force the connection speed and duplex from the Ethernet card to the SonicWall as well.

See also:

• Auto-negotiation must be enabled on both sides.
• FIXING SPEED/DUPLEX must be done on both sides.
• You can not have one side fixed, other side auto (When doing this, you will see the fixed side say at 100 MB FD, and the auto come up with 100 MB HD, which leads to DUPLEXING errors).
• You must have a CAT 5 cable WITH correct pinning (remember Ethernet uses 1,2,3,6).Do not split (e.g. 1=white orange, 2=orange, 3=white green, 4=green etc…) to be able to do 100 MB FD (If this is NOT met, you can’t get more then 10 MB Half Duplex over the link).
• You must have a CAT 5e cable WITH correct pinning (ALL 8 cables / 4 pairs) to be able to run GIGABIT.
• A Gigabit cross over cable, crosses ALL 4 Pairs (the cross over cables that USED to come with PRO’s only had 2 pairs crossed).
• Duplex mismatches are bad and can cause a huge amount of packet loss.

Resolution

Resolution for SonicOS 6.5

This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.

In SonicOS Enhanced:

1. Login to the SonicWall management Interface.
2. Select Manage | Network | Interfaces.
3. Select Edit this entry next to the interface to be configured.
4. Choose the Advanced tab.
5. If you want to specify the forced Ethernet speed and duplex, select one of the following options from the Link Speed menu.
6. Click OK, then press Apply to finalize the changes.

• 1000 Mbps - Full Duplex • 100 Mbps - Full Duplex • 100 Mbps - Half Duplex • 10 Mbps - Full Duplex • 10 Mbps - Half Duplex

In SonicOS Standard:

1. Select Network |Settings.
2. Select Edit this entry next to the interface to be configured.
3. Choose the Ethernet tab.
4. Make duplex and speed adjustments.
5. Click OK, then press Apply to finalize the changes.

In Gen 3 Firmware 6.X:

1. Select Advanced | Ethernet.
2. Make duplex and speed adjustments for the WAN, DMZ and LAN interfaces.
3. Adjust other items such as bandwidth management, MAC address proxy, packet fragmentation and WAN MTU.
4. Click Update.
   
   
   
   

Resolution for SonicOS 6.2 and Below

The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.

1. Login to the SonicWall management Interface.
2. Select Network| Interfaces.
3. Select Edit this entry next to the interface to be configured.
4. Choose the Advanced tab.
5. If you want to specify the forced Ethernet speed and duplex, select one of the following options from the Link Speed menu.
6. Click OK, then press Apply to finalize the changes.
   

   • 1000 Mbps - Full Duplex • 100 Mbps - Full Duplex • 100 Mbps - Half Duplex • 10 Mbps - Full Duplex • 10 Mbps - Half Duplex

In SonicOS Standard:

1. Select Network | Settings.
2. Select Edit this entry next to the interface to be configured.
3. Choose the Ethernet tab.
4. Make duplex and speed adjustments.
5. Click OK, then press Apply to finalize the changes.

In Gen 3 Firmware 6.X:

1. Select Advanced | Ethernet.
2. Make duplex and speed adjustments for the WAN, DMZ and LAN interfaces.
3. Adjust other items such as bandwidth management, MAC address proxy, packet fragmentation and WAN MTU.
4. Click Update.

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