Ethernet Link Redundancy Configuration Diagrams; Figure 21: Ethernet Link Redundancy Configuration Models - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual

GE-2 Line Module
Configurations
Copyright © 2010, Juniper Networks, Inc.
The type of hardware used for connections further characterizes the single-homed and
dual-homed configuration models. The following hardware types are available:
Homogeneous—Remote interface is on another Fast Ethernet or Gigabit Ethernet port
in a back-to-back router configuration of identical hardware and JunosE Software
versions. Both interfaces support the same redundant cabling and algorithm. The
interfaces can be cabled on the same ports (port 0–port 0, port 1–port 1) or
cross-cabled (port 0–port 1, port 1–port 0).
Heterogeneous—Remote interface is on a different type of hardware that might or
might not support redundant cabling, or on the same type of equipment with different
software versions. For example, a heterogeneous configuration can include an ES2-S1
GE-4 IOA and an ES2-S1 GE-8 IOA on the E320 router, or an E Series router operating
JunosE Software connected to another vendor's router and software.
NOTE: You cannot configure link redundancy across different types of line
modules in a router. You also cannot configure link redundancy across two
GE-4 IOAs on the E120 or the E320 routers.
Figure 21 on page 209 illustrates the configuration models for Ethernet link redundancy.

Figure 21: Ethernet Link Redundancy Configuration Models

Ethernet Link Redundancy Configuration Diagrams

The diagrams in this section illustrate examples of Ethernet link redundancy
configurations. The diagrams display adjacent ports bundled in a LAG.
These diagrams compare physical port redundancy and link redundancy on a GE-2 line
module.
Chapter 6: Configuring 802.3ad Link Aggregation and Link Redundancy
209