Trunk speed link issue

[mojogar]

I am trying ot trunk 2 switches at 1000mb.  The 1st is a Cisco 3650 and the latter a Netgear M4100-50G.  I can only get the link to work with both sides set to "Auto", and they only negotiate at 100mb.  My WAN provider has a couple of Cisco 3560 linked to the Netgear at 1000mb configed to auto, no problems on there end.  I can see that they are 1000mb in the Netgear interface.

Things I have tried:

switching adn verifying the physical layer.  Check.  I have tried and verified other ethernet cables.

changing the Cisco trunk interface to 1000mb manual.  check

changing the Cisco trunk interface to full-duplex manual.  check

changing the Cisco trunk interface to "speed auto1000"mb manual.  check

When chaging the interface to manual, connection goes down, I have tried rebooting the switch when this happens.

On the Netgear side, there is no command for setting the port to 1000mb.  I only have options for 10 100.  So it seems that auto is the only way to negotiate 1000mb.

Is there anything Im missing on the Cisco side?

[chrihussey]

Seems like you have been pretty thorough. Try "speed nonegotiate" on the interface.

[mojogar]

no go on that command as it is not an option:

xxx(config-if)#speed ?
10 Force 10 Mbps operation
100 Force 100 Mbps operation
1000 Force 1000 Mbps operation
auto Enable AUTO speed configuration

xxx(config-if)#speed neg?
% Unrecognized command

[chrihussey]

That command may only be available for SFP ports. Sorry.

For such a simple matter it's tough to say why it isn't working. I'm at a loss for the Netgear side but will just throw these suggestions out there.

1. If the Cisco swtich is POE, disable it on the port. (It actually fixed a similar issue I was having).
2. Try different ports on the switches.
3. Try different lengths of patch cords.
4. Just as a test, plug a laptop or another Netgear switch into the Netgear and verify it negotiates to Gig with a device other than the Cisco.
5. If you have a copper SFP, try that in the Cisco, here you will be able to use the nonegotiate command.

Sorry I couldn't be of more help. Good luck and please let me know if you are able to resolve.

[mojogar]

I have disabled POE on that port and the link stayed at 100mb negotiated.  I unplugged and re-plugged the link, but could not reboot the switch at the time.  If I get a chance after business hours I will try to reboot the switch with that set.

I also have tried points 2, 3, and 4 to no avail.

Unfortunately I do not have a copper SFP to try point 5.

[chrihussey]

Regarding #4, the Netgear didn't negotiate to gig with a laptop or other device plugged into the port?

[Julio E. Moisa]

Hi

I think the inconvenience is not with the Cisco device, it could be pointing to the Netgear switch, apparently it has CLI commands:

https://www.netgear.com/support/product/M4100-50G+$28GSM7248v2h2$29

http://www.downloads.netgear.com/files/GDC/M4100/M4100-M7100_CLI_15Feb2013.pdf

Page 24

speed

This command sets the speed and duplex setting for the interface.

Format speed [{auto}] [{<100 | 10 | 10G> {}}] Mode 100h 100f 10h 10f 10Gh 10Gf speed all This command sets the speed and duplex setting for all interfaces.

Format speed all [{auto}] [{<100 | 10> {}}]

Mode 100h 100f 10h 10f 10Gh 10Gf Global Config Interface Config Acceptable Values Definition 100BASE-T half duplex 100BASE-T full duplex 10BASE-T half duplex 10BASE-T full duplex 10GBase-T full duplex 10Gbase-T half duplex Global Config Acceptable Values Definition 100BASE-T half duplex 100BASE-T full duplex 10BASE-T half duplex 10BASE-T full duplex 10GBase-T full duplex 10Gbase-T half duplex

Im not really sure about Netgear but apparently it just accept 10/100 and 10,000 speeds, try configuring it with speed all  Its documentation says it support 46 1000 Ethernet ports, but it is weird because the 1G option is not included on the speed modes. 

Connectivity

• IEEE 802.3af Power over Ethernet (PoE) provides up to 15.4W per port
• IEEE 802.3at Power over Ethernet Plus (PoE+) provides up to 30W per port
• Desktop versions can be powered by upstream PoE+ switch
• M4100-D12G-POE+ can even redistribute PoE power from the upstream PoE+ switch to VoIP phones or other devices in meeting rooms, retail sales floors or other challenging environments without outlet
• Both IEEE 802.3at Layer 2 LLDP method and 802.3at 2-event classification methods are supported for compatibility with all PoE+ PD devices
• Automatic MDIX and Auto-negotiation on all ports select the right transmission modes (half or full duplex) as well as data transmission for crossover or straight-through cables dynamically for the admin
• 100Mbps backward compatiblity on all SFP ports
• IPv6 support with multicasting (MLD for IPv6 filtering), ACLs and QoS

Reference: http://www.netgear.com/business/products/switches/managed/m4100.aspx#tab-features

Have you contacted to Netgear before?

Hope it is useful

:-)

[mojogar]

I too tend to think the cause leans toward the Netgear.  I have posted to their support community as well.  I also too had looked at Netgear's commands and found it interesting that the listing of available speeds at manual setting does not explicitly include 1000f or 1Gf.  Strange.  I will try your command recomnedation and let you know.

[Julio E. Moisa]

Thank you, please keep us posted.

:-)

[Georg Pauwen]

Hello,

on a side note, and back to the physical layer: are the switches connected back to back through a cross cable, or is there one or more wiring cabinet involved ?

[mojogar]

back to back.

[Leo Laohoo]

---

@mojogar wrote:

When chaging the interface to manual, connection goes down, I have tried rebooting the switch when this happens. 

---

Can you please elaborate further on this?  If you manually configure the Cisco-side interface to 1 Gbps, the link goes down, but does the link STAYS DOWN? 

If the answer is YES, then run a TDR on the link(s):

1. Command:  test cable tdr interface <BLAH>; 
2. Wait for about 5 to 7 seconds for the process to complete; 
3. Command:  sh cable tdr interface <BLAH>; 
4. Post the complete output to #3.

[Georg Pauwen]

In your original post you said:

switching adn verifying the physical layer. Check. I have tried and verified other ethernet cables.

--> Just make sure you are using at least Cat5e, or better, 6/6a or 7.

[mojogar]

correct.  My cables meet 1G standard specification and have been verified to carry 1G.