Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X User Manual

Allowed Combinations for Line Rate Performance
The SRP-5G+ and SRP-10G modules support all the line modules listed in Table 40
on page 374.
Only certain combinations of line modules allow line rate performance (see Table
41 on page 375 through Table 43 on page 376). However, if performance lower than
line rate is acceptable, you can use any combination of line modules in a slot group.
For example, the SRP-10G module offers a total bandwidth of 2.5 Gbps for each slot
group. The GE line module requires 2.46 Mbps bandwidth for operation at line rate,
and can use both switches in the SRP-10G module. If you require line rate from a GE
line module, install only one GE line module in the slot group. However, if lower
performance is acceptable, you can install two or three GE line modules in a slot
group and enable bandwidth oversubscription.
When bandwidth oversubscription is enabled, all line modules optimize use of the
resources available. For example, if two GE line modules are installed in a slot group,
each line module is allocated 50 percent of the available bandwidth. However, if one
line module is using less bandwidth than it is allocated, the other line module can
use more bandwidth than it is allocated and can operate at a greater rate.
Table 41 on page 375, Table 42 on page 376, and Table 43 on page 376 indicate
combinations of line modules that allow line rate performance.
Table 41: Combinations of Line Modules for Line Rate Performance—SRP-10G Module
in an ERX7xx Model
Examples of Forbidden
Combinations
Examples of Allowed
Combinations
Possible Combinations of Line
Modules
■
A GE/FE line
module and any
other line module
in slot group 1
■
Two OCx/STMx
POS line modules
in slot group 1
■
One OCx/STMx POS line
module in slot group 1, a
GE/FE line module in slot
group 2, and one OCx/STMx
ATM line module in slot
group 4
■
Two OCx/STMx ATM line
modules in slot group 1, one
GE/FE line module in slot
group 2, and one SM in slot
group 3
■
One supported line module
and one empty slot in slot
group 1
NOTE: The SRP-10G module
supports all line modules
listed in Table 40 on
page 374.
■
Two OCx/STMx ATM line
modules in slot group 1
■
One supported line module
in slot groups 2, 3 and 4
Configuring Performance Rate of Line Modules on ERX7xx Models and the ERX1410 Router ■ 375
Chapter 6: Managing Modules

Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Specifications

General

Brand	Juniper
Model	SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X
Category	Software
Language	English