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#1 2020-03-25 09:21:27

r-giskard-reventlov
Member
Registered: 2020-03-25
Posts: 2

Only 100Mb with NetXtreme BCM5764M Gigabit NIC

Hi all,

I recently did a reinstall to sort out some niggles and I'm now only getting 100Mb on my NIC. This used to work perfectly and I've not changed any other parts of my setup.

[justin@trantor ~]$ ethtool enp2s0
Settings for enp2s0:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
	                                     100baseT/Half 100baseT/Full 
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 100Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 1
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: on
Cannot get wake-on-lan settings: Operation not permitted
	Current message level: 0x000000ff (255)
			       drv probe link timer ifdown ifup rx_err tx_err
	Link detected: yes
[justin@trantor ~]$ sudo lshw -c network
  *-network                 
       description: Ethernet interface
       product: NetXtreme BCM5764M Gigabit Ethernet PCIe
       vendor: Broadcom Inc. and subsidiaries
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: enp2s0
       version: 10
       serial: 1c:c1:de:34:80:d3
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=full firmware=5764m-v3.35 ip=192.168.1.16 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:38 memory:ed000000-ed00ffff
  *-network
       description: Ethernet interface
       product: NetXtreme BCM5764M Gigabit Ethernet PCIe
       vendor: Broadcom Inc. and subsidiaries
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: enp1s0
       version: 10
       serial: 1c:c1:de:34:80:d2
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=5764m-v3.35 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:39 memory:ec000000-ec00ffff

Thanks for any help you can provide

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#2 2020-03-25 13:56:35

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 17,116

Re: Only 100Mb with NetXtreme BCM5764M Gigabit NIC

Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                         100baseT/Half 100baseT/Full

If I read that correctly, the thing you are plugged into is not advertising 1000baseT capability.  What is it into which you are plugged?  Have you tried a different cable -- one that for sure has all 4 twisted pair?

Last edited by ewaller (2020-03-25 13:56:52)


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#3 Yesterday 09:30:41

r-giskard-reventlov
Member
Registered: 2020-03-25
Posts: 2

Re: Only 100Mb with NetXtreme BCM5764M Gigabit NIC

I've tried changing over the cable (all wires present) with no change. My machine (HP Z800) has two NICS of the same type:

Integrated Broadcom 5764 PCIe LOM Controller
Broadcom NetXtreme Gigabit Ethernet Plus NIC (PCIe)

These used to work before the reinstall at 1Gb.

My concern is that I used a script for the install to speed things up as I needed to reinstall during work hours... I'm wondering if it's made some assumptions which are faulty.

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#4 Yesterday 14:35:53

seth
Member
Registered: 2012-09-03
Posts: 14,014

Re: Only 100Mb with NetXtreme BCM5764M Gigabit NIC

You could disable autoneg and set the speed to 1000M, but ewaller is right: you end up w/ 100M because the other side (router, switch - any changes there?) says it can only do 100M.

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