Juniper JUNOS OS 10.4 - RELEASE NOTES REV 5 Release Note page 11

Copyright © 2011, Juniper Networks, Inc.
New Features in Junos OS Release 10.4 for M Series, MX Series, and T Series Routers
IQ2 and IQ2E PIC interfaces report IPv6 statistics for the Layer 2 frame size. For all
other interfaces, the Layer 3 packet size is accounted.
The IPv6 statistics can be viewed by logging in to the individual IQ2 PIC or IQ2E PIC, or
by using the CLI.
Local statistics are not accounted separately.
To display total IPv6 statistics for IQ2 and IQ2E PICs, use the
command.
NOTE: The reported IPv6 statistics do not account for the traffic manager
drops in egress direction or the Packet Forwarding Engine/traffic manager
drops in the ingress direction. Transit statistics are not accounted separately
because the IQ2 and IQ2E PICs cannot differentiate between transit and
local statistics.
[Network Interfaces]
100-Gigabit Ethernet PIC interoperability with VLAN steering—Supports
interoperability with similar PICs from other vendors using a VLAN steering forwarding
option. Previously, the PICs required interconnection to the same model PIC.
Interoperability with interfaces from other vendors was not supported. Junos OS Release
10.4 introduces a new VLAN steering algorithm to configure 100-Gigabit Ethernet PIC
interoperation with similar interfaces from other vendors.
Two packet forwarding modes exist under the
mode, for proprietary connection of two Juniper Networks 100-Gigabit Ethernet PICs,
uses the Ethernet header SA MAC address multicast bit to steer the packets to the
appropriate PFE. VLAN steering mode allows the PIC to connect to non-Juniper
Networks equipment. On ingress, the PIC compares the outer VLAN ID against a
user-defined VLAN ID and VLAN mask combination and steers the packet accordingly.
Modifying the forwarding mode config reboots the PIC.
VLAN steering overview:
In VLAN steering mode, the SA multicast bit is not used for packet steering.
In SA multicast bit steering mode, VLAN ID and VLAN mask configuration is not used
for packet steering.
Configuration of packet forwarding mode and VLAN steering mode uses CLI
commands that result in a PIC reboot.
There are three tag types for ingress packets:
Untagged ingress packet–The packet is sent to PFE1.
Ingress packet with one VLAN–The packet forwards based on the VLAN ID.
Ingress packet with two VLANs–The packet forwards based on the outer VLAN
ID.
show interfaces extensive
forwarding-mode statement. SA multicast
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