• Supported Platforms
• MX Series

• Related Topics
• MX Series Router Architecture
• MX Series Router Packet Forwarding and Data Flow
• Line Cards Supported on MX Series Routers
• Layer 2 and Layer 3 Features on MX Series Routers

Ethernet Frame Counts and Statistics on MX Series Routers

The following considerations apply to Ethernet frame counts and statistics on Juniper Networks MX Series Ethernet Services Routers:

• Interface counters do not include the 7-byte Ethernet frame preamble and the frame delimiter byte.
• In Media Access Control (MAC) statistics. the frame size includes the MAC header and cyclical redundancy check (CRC) before any VLAN rewrite or other rules are applied.
• In traffic statistics, the frame size includes the Layer 2 header without the trailer CRC and after any VLAN rewrite or other rules are applied.