Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 880

JUNOS 10.1 Network Interfaces Configuration Guide
The 10-port 10-Gigabit OSE PIC has the following caveats:
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10-port 10-Gigabit Oversubscribed Ethernet PIC Overview
—Ethernet virtual private LAN service
ethernet-vpls
vlan-vpls —VLAN virtual private LAN service
flexible-ethernet-services
Single, stacked, and flexible VLAN tagging modes
Native VLAN configuration to allow untagged frames to be received on the tagged
interfaces
Maximum transmission unit (MTU) size of up to 9192 bytes for Ethernet frames
Link aggregation group (LAG) on single chassis
Interoperability with other 10-Gigabit Ethernet PICs in M Series and T Series
routers in the LAN PHY and the WAN PHY modes
Interrupt-driven link down detection mechanism
Two-to-one oversubscription of traffic across a port group
Traffic from ten ingress ports to the Packet Forwarding Engine traffic is statically
mapped to one of the five egress ports. 10 Gbps worth of bandwidth toward the
Packet Forwarding Engine is shared by two ingress ports (called a port group),
thereby achieving two-to-one oversubscription. This scheme provides two-to-one
oversubscription across a port group and not across the entire PIC.
Four queues per physical interface on ingress and eight queues per physical
interface on egress
A separate control queue per physical interface to ensure that the control packets
are not dropped during oversubscribed traffic
SFP+ optical diagnostics
SFP+ is a next-generation transceiver module form factor specified by the ANSI
T11 Group for 8.5 Gbps and 10 Gbps fibre channel and Ethernet applications.
The SFP+ form factor is 30 percent smaller than the XFP form factor. The
benefits include higher port density, lower power modules, and lower system
costs. The 10-port 10-Gigabit OSE PIC supports 10GBASE-SR and 10GBASE-LR
SFP+ optics.
Behavior aggregate (BA) classification (IPv4 DSCP, IPv6 DSCP, Inet precedence,
IEEE 802.1P, IEEE 802.1AD, MPLS EXP) and fixed classification
Weighted round-robin scheduling with two queue priorities (low and strict-high)
Committed information rate and peak information rate shaping on a per-queue
basis
Excess information rate configuration for allocation of excess bandwidth
Source address and destination address MAC filtering takes place after
oversubscription is handled.
Oversubscription on the PIC operates across a port group of two ports and not
at the PIC level.
Queuing is not supported at the logical interface level.
—Allows per-unit Ethernet encapsulation configuration