Why NIC is reporting the speed as 9900 Mbps ?

Issue

• NIC is reporting the speed as 9900 Mbps;

# ethtool eth0
Settings for eth0:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
                                2500baseX/Full
                               10000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  1000baseT/Full
                                2500baseX/Full
                                10000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 9900Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 16
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x00000000 (0)
        Link detected: yes

• Below messages are seen in /var/log/messages

 kernel: bnx2x: eth0 NIC Link is Up, 9900 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth2 NIC Link is Up, 100 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth0 NIC Link is Up, 9900 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth2 NIC Link is Up, 100 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth2 NIC Link is Up, 100 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth0 NIC Link is Up, 9900 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth2 NIC Link is Up, 100 Mbps full duplex, receive & transmit flow control ON
 kernel: bnx2x: eth1 NIC Link is Up, 9900 Mbps full duplex, receive & transmit flow control ON