ERX310, ERX7xx, and ERX14xx System Maximums
71
Appendix A: System Maximums
Physical and Logical Density Maximums
Table 2 lists physical and logical density maximums for the ERX routers. The
following notes are referred to in Table 2:
1.
Wire rate
indicates the port density that supports maximum (wire-rate)
performance.
Oversubscribed
indicates the port density possible when you are
willing to accept less than wire-rate performance by oversubscribing the
available fabric bandwidth. The ERX310 and ERX1440 routers do not support
oversubscription; port densities for these models indicate wire-rate
performance.
2.
When you pair the GE-2 or GE-HDE line module with the GE-2 SFP I/O module
on the ERX1440 router, you can terminate up to 24 Gigabit Ethernet interfaces.
Slots 2 and 4 on the ERX1440 router support two Gigabit Ethernet interfaces at
wire rate; the remaining 10 slots support one Gigabit Ethernet interface at wire
rate. On the ERX310 router, all four ports (active and redundant) are at wire
rate.
For more information about bandwidth and line-rate considerations for the
GE-2 line module or the GE-HDE line module and their corresponding I/O
modules on E Series routers, see
JunosE Physical Layer Configuration Guide,
Chapter 5, Configuring Ethernet Interfaces
.
3.
When you pair the GE-HDE line module with the GE-8 I/O module on the
ERX1440 router, you can terminate up to 96 Gigabit Ethernet interfaces. Slots 2
and 4 on the ERX1440 router support two Gigabit Ethernet interfaces at wire
rate; the remaining 10 slots support one Gigabit Ethernet interface at wire rate.
On the ERX310 router, only two Gigabit Ethernet interfaces per slot are at wire
rate; therefore, only four Gigabit Ethernet interfaces are at wire rate for the
entire router.
For more information about bandwidth and line-rate considerations for the
GE-HDE line module and the GE-8 I/O module on E Series routers, see
JunosE
Physical Layer Configuration Guide, Chapter 5, Configuring Ethernet Interfaces
.
4.
The OC3/STM-1 GE/FE line module and OC3-2 GE APS I/O module combination
does not support line rate for Gigabit Ethernet interfaces.
Table 2: Physical and Logical Density Maximums
Feature
ERX310
ERX705 and
ERX710
ERX1410
ERX1440
Physical density wire rate/oversubscribed
(See Note 1 on page 71.)
Channelized OC3 ports per chassis
(cOC3 STM1 FO I/O modules)
8
16/20
32/48
48
Channelized OC12 ports per chassis
(cOC12 STM4 FO I/O modules)
2
4/5
4/12
12
Channelized T3 ports per chassis
(CT3/T3 12 I/O modules)
24
48/60
96/144
144
E3 (unchannelized) ports per chassis
(CT3/T3 12 I/O modules)
24
48/60
96/144
144
