High-Density Ethernet - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - PHYSICAL LAYER CONFIGURATION GUIDE 2010-09-24 Configuration Manual

High-Density Ethernet

Copyright © 2010, Juniper Networks, Inc.
IEEE 802.3u (Fast Ethernet only)
IEEE 802.3z (Gigabit Ethernet only)
IEEE 802.3ae (10-Gigabit Ethernet only)
IEEE 802.3ad (Link Aggregation)
RFC 826—An Ethernet Address Resolution Protocol (November 1982)
For more information about MIB support for Ethernet interfaces, consult the following
resources:
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)
The following modules support high-density Ethernet:
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
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:
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
Chapter 5: Configuring Ethernet Interfaces
187