AM5718: Single Ethernet port

Sunmin Kim

Intellectual 750 points

Part Number: AM5718

SDK : ti-processor-sdk-linux-rt-am57xx-evm-05.03.00.07

u-boot : u-boot-2018.01+gitAUTOINC+313dcd69c2-ge2bc936055

kernel : linux-rt-4.14.79+gitAUTOINC+a72bf1418c-ga72bf1418c

------------------------------------------------------------------------------------------

I have a problem with rgmii now.

After using eth0, if you use the ethernet cable used for eth0 to eth1, it will not work. However, if you type and use "ifconfig eth0 down", it is enabled.

Do you know the cause?

I am using am5718 custom board.

over 5 years ago

0 Biser Gatchev-XID over 5 years ago

TI__Guru**** 393215 points

Please complete this checklist and post the results here: processors.wiki.ti.com/.../5x_CPSW

0 Sunmin Kim over 5 years ago in reply to Biser Gatchev-XID

Intellectual 750 points

Hi, Biser Gatchev-XID

I checked, but I can't figure out the cause.

I've tested and eth1 doesn't work unless I use eth0 first.

The text document below shared my terminal content as a result of my testing.

Fullscreen ethernet_issue.txt Download

test~#  
test~# 
test~# 
test~# ifconfig
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING NOARP  MTU:16  Metric:1
          RX packets:18 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10 
          RX bytes:48 (48.0 B)  TX bytes:68 (68.0 B)
          Interrupt:92 

eth0      Link encap:Ethernet  HWaddr 24:7D:4D:FB:CF:40  
          inet addr:118.219.85.127  Bcast:118.255.255.255  Mask:255.0.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:89 

eth1      Link encap:Ethernet  HWaddr 24:7D:4D:FB:CF:41  
          inet addr:118.219.85.126  Bcast:118.255.255.255  Mask:255.0.0.0
          inet6 addr: fe80::267d:4dff:fefb:cf41%775872/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6968 errors:0 dropped:213 overruns:0 frame:0
          TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:484200 (472.8 KiB)  TX bytes:5715 (5.5 KiB)

eth2      Link encap:Ethernet  HWaddr 82:B6:4F:43:B4:CE  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth3      Link encap:Ethernet  HWaddr A6:BD:C2:5A:5E:22  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1%775872/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:284 errors:0 dropped:0 overruns:0 frame:0
          TX packets:284 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:25803 (25.1 KiB)  TX bytes:25803 (25.1 KiB)

test~# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000000 (0)
                               
        Link detected: yes
test~# ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  100baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000000 (0)
                               
        Link detected: no
test~# ethtool -S eth1                                                                                                                                                                                             
NIC statistics:
     Good Rx Frames: 12418
     Broadcast Rx Frames: 7021
     Multicast Rx Frames: 5394
     Pause Rx Frames: 0
     Rx CRC Errors: 0
     Rx Align/Code Errors: 0
     Oversize Rx Frames: 0
     Rx Jabbers: 0
     Undersize (Short) Rx Frames: 0
     Rx Fragments: 0
     Rx Octets: 1150141
     Good Tx Frames: 35
     Broadcast Tx Frames: 0
     Multicast Tx Frames: 33
     Pause Tx Frames: 0
     Deferred Tx Frames: 0
     Collisions: 0
     Single Collision Tx Frames: 0
     Multiple Collision Tx Frames: 0
     Excessive Collisions: 0
     Late Collisions: 0
     Tx Underrun: 0
     Carrier Sense Errors: 0
     Tx Octets: 5855
     Rx + Tx 64 Octet Frames: 9797
     Rx + Tx 65-127 Octet Frames: 954
     Rx + Tx 128-255 Octet Frames: 682
     Rx + Tx 256-511 Octet Frames: 1016
     Rx + Tx 512-1023 Octet Frames: 4
     Rx + Tx 1024-Up Octet Frames: 0
     Net Octets: 1155996
     Rx Start of Frame Overruns: 0
     Rx Middle of Frame Overruns: 0
     Rx DMA Overruns: 0
     Rx DMA chan 0: head_enqueue: 1
     Rx DMA chan 0: tail_enqueue: 7791
     Rx DMA chan 0: pad_enqueue: 0
     Rx DMA chan 0: misqueued: 0
     Rx DMA chan 0: desc_alloc_fail: 0
     Rx DMA chan 0: pad_alloc_fail: 0
     Rx DMA chan 0: runt_receive_buf: 0
     Rx DMA chan 0: runt_transmit_bu: 0
     Rx DMA chan 0: empty_dequeue: 0
     Rx DMA chan 0: busy_dequeue: 7647
     Rx DMA chan 0: good_dequeue: 7664
     Rx DMA chan 0: requeue: 0
     Rx DMA chan 0: teardown_dequeue: 0
     Tx DMA chan 0: head_enqueue: 35
     Tx DMA chan 0: tail_enqueue: 0
     Tx DMA chan 0: pad_enqueue: 0
     Tx DMA chan 0: misqueued: 0
     Tx DMA chan 0: desc_alloc_fail: 0
     Tx DMA chan 0: pad_alloc_fail: 0
     Tx DMA chan 0: runt_receive_buf: 0
     Tx DMA chan 0: runt_transmit_bu: 2
     Tx DMA chan 0: empty_dequeue: 35
     Tx DMA chan 0: busy_dequeue: 0
     Tx DMA chan 0: good_dequeue: 35
     Tx DMA chan 0: requeue: 0
     Tx DMA chan 0: teardown_dequeue: 0
test~# ethtool -T eth1                                                                                                                                                                                             
Time stamping parameters for eth1:
Capabilities:
        hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
        software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
        hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
        software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
        software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
        hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
        off                   (HWTSTAMP_TX_OFF)
        on                    (HWTSTAMP_TX_ON)
Hardware Receive Filter Modes:
        none                  (HWTSTAMP_FILTER_NONE)
        ptpv1-l4-event        (HWTSTAMP_FILTER_PTP_V1_L4_EVENT)
        ptpv2-event           (HWTSTAMP_FILTER_PTP_V2_EVENT)
test~# ping 118.219.85.240
PING 118.219.85.240 (118.219.85.240): 56 data bytes
^C
--- 118.219.85.240 ping statistics ---
8 packets transmitted, 0 packets received, 100% packet loss
test~# cpsw 48484000.ethernet eth1: Link is Down

test~# cpsw 48484000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

test~# ping 118.219.85.240
PING 118.219.85.240 (118.219.85.240): 56 data bytes
64 bytes from 118.219.85.240: seq=0 ttl=64 time=0.300 ms
64 bytes from 118.219.85.240: seq=1 ttl=64 time=0.278 ms
64 bytes from 118.219.85.240: seq=2 ttl=64 time=0.265 ms
64 bytes from 118.219.85.240: seq=3 ttl=64 time=0.358 ms
^C
--- 118.219.85.240 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.265/0.300/0.358 ms
test~# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000000 (0)
                               
        Link detected: no
test~# ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  100baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000000 (0)
                               
        Link detected: yes
test~#                    
test~# 
test~# cpsw 48484000.ethernet eth0: Link is Down
cpsw 48484000.ethernet eth1: Link is Up - 10Mbps/Full - flow control off

test~# 
test~# ping 118.219.85.240
PING 118.219.85.240 (118.219.85.240): 56 data bytes
64 bytes from 118.219.85.240: seq=0 ttl=64 time=0.737 ms
64 bytes from 118.219.85.240: seq=1 ttl=64 time=0.490 ms
64 bytes from 118.219.85.240: seq=2 ttl=64 time=0.397 ms
64 bytes from 118.219.85.240: seq=3 ttl=64 time=0.435 ms
^C
--- 118.219.85.240 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.397/0.514/0.737 ms
test~#

0 Schuyler Patton over 5 years ago in reply to Sunmin Kim

TI__Mastermind 40080 points

Hi,

I would possibly conclude that the ports themselves are working since eth1 works after you take down eth0. One possible suggestion to why this occurring is that both ports are on the same .85 subnet:

eth0 inet addr:118.219.85.127 Bcast:118.255.255.255 Mask:255.0.0.0

eth1 inet addr:118.219.85.126 Bcast:118.255.255.255 Mask:255.0.0.0

You can probably see this if you hook up a wireshark on port 0 while trying to use port 1. I have assumed that both ports are getting their ip address statically. I recommend that both ports have to be on separate networks to function correctly. What I mean be this is that they cannot be connected to the same switch. One possible topology would be to use 2 off the shelf wlan routers that can assign ip addresses, they will need to be configured to not use the same subnet. E.g. one router would provide an address of range of 192.168.10.x and the other would provide an address range of 192.168.20.x.

Also please take a look at this training pdf starting at about slide 51 discussing the same subnet issue.

Best Regards,

Schuyler

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AM5718: Single Ethernet port