Figure 2: Shared Interfaces - Juniper JUNOS OS 10.4 - PROTECTED SYSTEM DOMAIN Configuration Manual

JUNOS 10.4 Protected System Domain Configuration Guide
Protected System Domain 1
logical
interface 1
Protected System Domain 2
logical
interface 2
logical
interface 3
6
the physical shared interface are owned by the Root System Domain (RSD). However,
the logical interfaces configured under the shared interface are assigned to and owned
by different PSDs. By sharing a single interface among multiple PSDs, the cost of traffic
forwarding is reduced and resources can be allocated flexibly at a more granular level.
Any FPC that has not been assigned to a specific PSD can be used to host shared
interfaces. On the RSD, multiple logical interfaces are configured on the physical interface
and each individual logical interface is assigned to a different PSD. On the PSD, each
assigned logical interface is configured and peered with an uplink tunnel interface
( ), which transports packets between the PSD and the shared interface
ut-fpc/pic/slot
on the RSD. See Figure 2 on page 6.

Figure 2: Shared Interfaces

Tunnel PIC
Tunnel PIC
NOTE:
When applied to shared interfaces:
Junos features that are configured under logical interfaces, such as
class-of-service (CoS) classifiers and rewrites, firewall filters, and policers,
are configured on the PSD.
Junos features that are configured under physical interfaces, such as drop
profiles and schedule maps, are configured on the RSD.
The packets belonging to a shared interface pass between the Packet Forwarding Engine
on the PIC in the RSD and the Packet Forwarding Engine on the uplink tunnel PIC in the
PSD through a cross-connect in the forwarding fabric.
Root System Domain
OC192
Shared physical interface
Logical interfaces
Cross-connect
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