High-Density Ethernet - Juniper PHYSICAL LAYER - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.1.x Physical Layer Configuration Guide
For more information about MIB support for Ethernet interfaces, consult the following
resources:

High-Density Ethernet

The following modules support high-density Ethernet:
In the current release, you cannot configure port parameters for high-density Ethernet.
Instead, JUNOSe Software contains a packet classifier that enables the module to
intelligently drop certain packets when the module becomes oversubscribed. The
packet classifier inspects each incoming packet to determine whether to classify it
as control traffic. To enhance network stability, the packet classifier prioritizes control
traffic over non-control traffic (that is, data). The packet classifier randomly drops
non-control packets when the interface is oversubscribed.
When the I/O module or IOA is oversubscribed, the packet classifier prioritizes the
following types of control traffic:
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High-Density Ethernet
RFC 2863 The Interfaces Group MIB (June 2000)
RFC 2668 Definitions of Managed Objects for IEEE 802.3 Medium Attachment
Units (MAUs) (August 1999)
RFC 2665 Definitions of Managed Objects for the Ethernet-like Interface Types
(August 1998)
GE-HDE line module and GE-8 I/O module combination
ES2 4G LM and ES2-S1 10GE IOA module combination
ES2 4G LM and ES2-S1 GE-8 IOA module combination
PPP discovery or PPP session
Address Resolution Protocol (ARP)
802.3ad (link aggregation)
802.3 Spanning Tree Protocol (STP)
IPv4 and IPv6 DHCP server
IPv4 and IPv6 DHCP host
IPv6 Neighbor Discovery
IPv4 virtual router alert
IPv4 and IPv6 Internet Group Management Protocol (IGMP)
IPv4 packets with a type of service (ToS) precedence value set to Internetwork
Control (C0)
IPv6 packets with a traffic class precedence value set to Internetwork Control
(C0)