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Table 20: Average Data Rate for Two ES2-S1 GE-8 IOAs Installed with an ES2 10G
LM
100 Gbps, 120 Gbps, or 320 Gbps
Configuration
Average Data Rate per GE-8 IOA
Port Combination
(> 128 Byte Packets)
All sixteen ports
625 Mbps per port
Any five ports on each
1 Gbps per port
IOA
Managing High-Density Ethernet
When installed in an E120 or an E320 router with any SRP module combination, the
overall data rate for the ES2 10G LM with one ES2-S1 GE-8 IOA is limited to 5 Gbps.
The overall data rate for the ES2 10G LM with two ES2-S1 GE-8 IOAs is limited to
10 Gbps. In all configurations, the line module can become oversubscribed because
of the IOA available wire rate (8 Gbps).
Currently, flow control using MAC pause frames is disabled on the ES2-S1 GE-8 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 196.
ES2 10G ADV LM Combination
You can combine an ES2–S1 GE-8 IOA in a slot only with another ES2–S1 GE-8 IOA
when paired with the ES2 10G ADV LM.
With a 100 Gbps fabric configuration, the E320 router can accommodate up to 2
combinations of ES2 10G ADV LMs and ES2-S1 GE-8 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 ADV LMs and ES2-S1 GE-8 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 ADV LMs and ES2-S1 GE-8 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
Each ES2-S1 GE-8 IOA is connected to the ES2 10G ADV LM through a 5 Gbps bus.
Therefore, the aggregate bandwidth of any IOA is limited to 5 Gbps.
Chapter 5: Configuring Ethernet Interfaces
Gigabit Ethernet I/O Modules and IOAs
187
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