Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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With a 120 Gbps fabric configuration, the E120 router can accommodate up to 6
combinations of ES2 10G LMs and ES2-S3 GE-20 IOAs. You can install a combination
in any of the line module slots, each of which are allocated 10 Gbps of overall
bandwidth.
With a 320 Gbps fabric configuration, the E320 router can accommodate up to 12
combinations of ES2 10G LMs and ES2-S3 GE-20 IOAs. You can install a combination
in any of the line module slots, each of which are allocated 10 Gbps of overall
bandwidth.
Bandwidth and Line Rate Considerations
Table 20 on page 186 lists the average data rate on the ES2-S3 GE-20 IOA when
installed in E120 and E320 routers with one ES2 10G LM installed.
Table 22: Average Data Rate for One ES2-S3 GE-20 IOA Installed with an ES2 10G
LM
100 Gbps, 120 Gbps, or 320 Gbps
Configuration
Average Data Rate per GE-20 IOA
(> 128 Byte Packets) Port
Combination
1 Gbps per port Any 10 ports
500 Mbps per port All 20 ports
Managing High-Density Ethernet
When installed in an E120 router or an E320 router with any SRP module
combination, the overall data rate for the ES2 10G LM with one ES2-S3 GE-20 IOA
is limited to 10 Gbps. The line module can become oversubscribed because of the
IOA available wire rate (20 Gbps).
Currently, flow control using MAC pause frames is disabled on the ES2-S3 GE-20
IOA. The IOA does not transmit or receive pause frames.
For more information about high-density Ethernet on E-series routers, see
“High-Density Ethernet” on page 192
.
10-Gigabit Ethernet IOAs
10-Gigabit Ethernet interfaces are supported on the ES2-S1 10GE IOA and the ES2-S1
10GE PR IOA. For more information about 10-Gigabit Ethernet, see IEEE Standard
802.3ae.
ES2-S1 10GE IOA
The E120 router and the E320 router support the ES2-S1 10GE IOA. Other E-series
routers do not support the ES2-S1 10GE IOA.
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10-Gigabit Ethernet IOAs
JUNOSe 10.0.x Physical Layer Configuration Guide