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The ES2-S3 GE-20 IOA pairs with the ES2 10G LM or the ES2 10G ADV LM to provide
Gigabit Ethernet operation through 20 line interfaces.
The ES2-S3 GE-20 IOA is offered in a full-height size that uses both adapter bays.
The IOA is identified by the software as adapter bay 0. For more information about
installing IOAs, see the E120 and E320 Hardware Guide.
The IOA can use either fiber-optic or copper SFPs. The IOA accepts up to four pairs
(Tx/Rx) of LC-style fiber-optic connectors that support different optical modes and
cabling distances.
The ES2-S3 GE-20 IOA does not support port redundancy.
ES2 10G LM Combination
With a 100 Gbps fabric configuration, the E320 router can accommodate up to 2
combinations of ES2 10G LMs and ES2-S3 GE-20 IOAs. You must install a combination
in either of the turbo slots (slot 2 or slot 4). The 100 Gbps allocates 10 Gbps of overall
bandwidth to each of these slots.
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 is 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 is allocated 10 Gbps of overall
bandwidth.
Bandwidth and Line Rate Considerations
Table 23 on page 189 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 23: Average Data Rate for One ES2-S3 GE-20 IOA Installed with an ES2 10G
LM
100 Gbps, 120 Gbps, or 320 Gbps
Configuration
Port
Average Data Rate per GE-20 IOA
Combination
(> 128 Byte Packets)
Any 10 ports
1 Gbps per port
All 20 ports
500 Mbps per port
Managing High-Density Ethernet
When installed in an E120 or 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.
Chapter 5: Configuring Ethernet Interfaces
Gigabit Ethernet I/O Modules and IOAs
189
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