AM5729: 使用 phy DP83867IRRGZ ，无法ping通网线直连的设备

请贴出您使用的SDK，并且详细描述一下两块板子直连是如何ping的。

SDK版本为 5.03，系统为 premmpt rt linux，两块板子的ip为同一网段，在板子进入Linux系统后，使用ping命令

请贴出以下指令的结果以及ping命令的信息，我需要咨询相关工程师再给您回复。

ethtool eth0/eth1

ethtool -S eth0/eth1

# 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: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
[10380.787720] cpsw 48484000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
1000baseT/Half 1000baseT/Full
Advertised pause frame use: [10380.802954] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000000 (0)

Link detected: no

板子网口为千兆网口，直连一台百兆网口的设备ping不通，直连另一个千兆网口是能ping通的