ES2-S2 10GE PR IOAs Overview

The E120 and E320 routers support the ES2-S2 10GE PR IOA. Other E Series routers do not support the ES2-S2 10GE PR IOA.

The ES2-S2 10GE PR 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 ES2-S2 10GE PR IOA has one port, uses a range of XFPs to support different optical modes and cabling distances, and accepts 10 LC-style fiber-optic connectors.

The single port on the ES2-S2 10GE PR IOA has a redundant port. If the active port fails, the redundant port automatically becomes active. You can configure only the active port for a 10-Gigabit Ethernet interface; you cannot configure the redundant port. Cabling both ports provides a redundant path to the 10-Gigabit Ethernet interface.

The ES2-S2 10GE PR IOA pairs with the ES2 10G Uplink LM to provide uplink services or the ES2 10G LM or the ES2 10G ADV LM to provide access services.

ES2 10G Uplink LM Combination

With a 100 Gbps fabric configuration, the E320 router can accommodate up to 2 combinations of ES2 10G Uplink LMs and ES2-S2 10GE PR 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 Uplink LMs and ES2-S2 10GE PR 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 Uplink LMs and ES2-S2 10GE PR IOAs. You can install a combination in any of the line module slots, each of which is allocated 10 Gbps of overall bandwidth.

Uplink Operation

The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination provides an uplink connection from the core network to the edge rather than traditional broadband access services such as PPPoE, transparent bridging, and subscriber interfaces.

The combination can receive and transmit full duplex line rate of 10 GB (10 GB at the ingress and 10 GB at the egress). The IOA can also support 9600-byte jumbo Ethernet frames at the ingress (MRU) and 9188-byte jumbo Ethernet frames at the egress (MTU).

Note: The size of jumbo packets refers to the maximum allowable size in bytes of the MRU for the jumbo Ethernet frames and not the maximum allowable size in bytes of the MTU (frames transmitted from the egress interface).

Multicast

The ES2 10G Uplink LM can receive multicast traffic, including all multicast control protocols. The ES2 10G Uplink LM can also transmit multicast control protocol frames and multicast data frames to perform multicast egress elaboration.

L2TP

An E Series router can be configured as either an L2TP access concentrator (LAC) or an L2TP network server (LNS). The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination supports an E Series router configured as a LAC only for traffic to or from an LNS. The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination supports both sides of the L2TP LNS function (LAC facing and core facing).

Flow Control and Policy

The ES2 10G Uplink LM and ES2-S2 10GE PR IOA combination does not support quality of service (QoS) functionality that is available on other ASIC-based Ethernet modules.

Although the ES2 10G Uplink LM does not support scheduling and shaping for egress traffic, the LM does account for the traffic class of packets through the fabric so that high priority packets are scheduled for transmission to the line module before lower priority packets. Packets that arrive at the line module are processed and transmitted using a flow-through scheme.

Currently, flow control using MAC pause frames is disabled on the ES2-S2 10GE PR IOA. The IOA does not transmit or receive pause frames. Instead, the system prioritizes control traffic over non-control traffic (that is, data). For a list of types of control traffic, see High-Density Ethernet Overview.

For information about configuring policies on the ES2 10G Uplink LM and ES2-S2 10GE PR IOA, see JunosE Policy Management Configuration Guide.

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-S2 10GE PR 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-S2 10GE PR 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-S2 10GE PR IOAs. You can install a combination in any of the line module slots, each of which is allocated 10 Gbps of overall bandwidth.

Access Operation

The ES2 10G LM and ES2-S2 10GE PR IOA combination provides traditional broadband access services such as PPPoE and subscriber interfaces. It also supports both sides of the L2TP LNS and LAC function.

The combination can receive and transmit full duplex line rate of 10 GB (10 GB at the ingress and 10 GB at the egress). The IOA can also support 9600-byte jumbo Ethernet frames at the ingress (MRU) and 9188-byte jumbo Ethernet frames at the egress (MTU).

Note: The size of jumbo packets refers to the maximum allowable size in bytes of the MRU for the jumbo Ethernet frames and not the maximum allowable size in bytes of the MTU (frames transmitted from the egress interface).

Multicast

The ES2 10G LM can receive multicast traffic, including all multicast control protocols. The ES2 10G LM can also transmit multicast control protocol frames and multicast data frames to perform multicast egress elaboration.

Flow Control and Policy

The ES2 10G LM and ES2-S2 10GE PR IOA combination supports QoS functionality that is available on other ASIC-based Ethernet modules.

Currently, flow control using MAC pause frames is disabled on the ES2-S2 10GE PR IOA. The IOA does not transmit or receive pause frames. Instead, the system prioritizes control traffic over non-control traffic (that is, data). For a list of types of control traffic, see High-Density Ethernet Overview.

For information about configuring policies on the ES2 10G LM and ES2-S2 10GE PR IOA, see JunosE Policy Management Configuration Guide.

ES2 10G ADV LM Combination

With a 100 Gbps fabric configuration, the E320 router can accommodate up to 2 combinations of ES2 10G ADV LMs and ES2-S2 10GE PR 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-S2 10GE PR 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-S2 10GE PR IOAs. You can install a combination in any of the line module slots, each of which is allocated 10 Gbps of overall bandwidth.

Access Operation

The ES2 10G ADV LM and ES2-S2 10GE PR IOA combination provides traditional broadband access services such as PPPoE and subscriber interfaces. It also supports both sides of the L2TP LNS and LAC function.

The combination can receive and transmit full duplex line rate of 10 GB (10 GB at the ingress and 10 GB at the egress). The IOA can also support 9600-byte jumbo Ethernet frames at the ingress (MRU) and 9188-byte jumbo Ethernet frames at the egress (MTU).

Note: The size of jumbo packets refers to the maximum allowable size in bytes of the MRU for the jumbo Ethernet frames and not the maximum allowable size in bytes of the MTU (frames transmitted from the egress interface).

Multicast

The ES2 10G ADV LM can receive multicast traffic, including all multicast control protocols. The ES2 10G ADV LM can also transmit multicast control protocol frames and multicast data frames to perform multicast egress elaboration.

Flow Control and Policy

The ES2 10G ADV LM and ES2-S2 10GE PR IOA combination supports QoS functionality that is available on other ASIC-based Ethernet modules.

Currently, flow control using MAC pause frames is disabled on the ES2-S2 10GE PR IOA. The IOA does not transmit or receive pause frames. Instead, the system prioritizes control traffic over non-control traffic (that is, data). For a list of types of control traffic, see High-Density Ethernet Overview.

For information about configuring policies on the ES2 10G ADV LM and ES2-S2 10GE PR IOA, see JunosE Policy Management Configuration Guide.

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