HP Server and the other interface is SW

I perform ethtool as below and found the speed is 100Mb/S on HP Server. and I want to change it to 1000Mb/s I already tried too change it manually but the eth goes down and returned back only when I adjusted it again to 100 Mb/s So is the issue in the Cable or the SW port which is connected to this server?

Settings for eth0:
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: No
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: off
Supports Wake-on: g
Wake-on: g 
Current message level: 0x000000ff (255) drv probe link timer ifdown ifup 
                       rx_err tx_err
Link detected: yes