Packet Flow On Acx Series Routers - Juniper ACX2000 Hardware Manual

Table 4: CLI Equivalents of Terms Used in Documentation for ACX2100 Routers (continued)
Hardware
Item (as Description (as
displayed displayed in the
in the CLI) CLI)
Fan Fan
NOTE: ACX2100
routers are fanless
models.
Figure 6: ACX2100 Interface Port Mapping
ACX2100
MGMT CONSOLE/AUX
ALARM
1PPS 10MHz
IN OUT IN OUT
0 1
SYS EXT REF CLK IN

Packet Flow on ACX Series Routers

The class-of-service (CoS) architecture for ACX Series routers is in concept similar to that for MX Series
routers. The general architecture for ACX Series routers is shown in
Figure 7: ACX Series Router Packet Forwarding and Data Flow
Ingress classification
In order of
decreasing precedence:
Incoming packet
MF classification (DFW)
Fixed classification
BA classification
Based on the model, ACX Series routers contain a built-in Routing Engine and Packet Forwarding Engine
and can contain both T1/E1 and Gigabit Ethernet Ports.
The Packet Forwarding Engine has one or two "pseudo" Flexible PIC Concentrators. Because there is no
switching fabric, the single Packet Forwarding Engine takes care of both ingress and egress packet
forwarding.
Value (as
displayed in the
CLI)
–
FPC 0, PIC 0 FPC 1, PIC 0
GE 1/0/0-1/0/3
T1/E1 0/0/0-0/0/15
T1/E1 GE
0/0/8 0/0/9 0/0/10 0/0/11 0/0/12 0/0/13 0/0/14 0/0/15 1/0/2
0/0/0 0/0/1 0/0/2 0/0/3 0/0/4 0/0/5 0/0/6 0/0/7 1/0/0
FPC 1, PIC 1
GE 1/1/0-1/1/3
Buffering Queuing
Item in Documentation
Fan
FPC 1, PIC 2
GE 1/2/0-1/2/1
1/0/3 1/1/2 1/1/3
1/1/2 1/1/3 1/2/1
1/0/1 1/1/0 1/1/1
COMBO PORTS 1/1/0 1/1/1 GE 1/2/0 1/3/0 XE 1/3/1
FPC 1, PIC 3
XE 1/3/0-1/3/1
Figure 7 on page
Scheduling Egress rewrite
Additional Information
"Cooling System and Airflow in
an ACX2000 and ACX2100
Router" on page 60
24.
Outgoing packet
24