Why do KVM guests show vnet interface link speed as 10Mbps
Issue
ethtool
reports speed of avnet
interface as 10Mbps on KVM guest machine.
# ethtool vnet1
Settings for vnet1:
Supported ports: [ ]
Supported link modes:
Supports auto-negotiation: No
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
MDI-X: Unknown
Current message level: 0xffffffa1 (-95)
Link detected: yes
Environment
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Virtualization 3 Hypervisors
- Red Hat Virtualization 4 Hypervisors
- KVM based Virtual Machines
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