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Physical and Logical Density Maximums
Table 2: Physical and Logical Density Maximums
Feature
Physical density wire rate/oversubscribed
(See Note 1 on page 61.)
Channelized OC3 ports per chassis
(cOC3 STM1 FO I/O modules)
Channelized OC12 ports per chassis
(cOC12 STM4 FO I/O modules)
Channelized T3 ports per chassis
(CT3/T3 12 I/O modules)
E3 (unchannelized) ports per chassis
(CT3/T3 12 I/O modules)
Fast Ethernet (10/100) ports per chassis
(FE-8 I/O and FE-8 SFP I/O modules)
Gigabit Ethernet ports per chassis
(GE I/O modules)
Copyright © 2010, Juniper Networks, Inc.
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.
ERX705 and
ERX310
ERX710
8
16/20
2
4/5
24
48/60
24
48/60
16
32/40
2
4/5
ERX310, ERX7xx, and ERX14xx System Maximums
System Maximums
ERX1410
ERX1440
32/48
48
4/12
12
96/144
144
96/144
144
32/96
96
4/12
12
61
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