Specifications

IPv6

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New forwarding-class-accounting statement (MX Series)—Starting in Junos OS Release

13.3R3, new forwarding class accounting statistics can be enabled at the [edit interfaces

interface-name] and [edit interfaces interface-name unit interface-unit-number] hierarchy

levels. These statistics replace the need to use firewall filters for gathering accounting

statistics. Statistics can be gathered in ingress, egress, or both directions. Statistics

are displayed for IPv4, IPv6, MPLS, Layer 2, and Other families.

NOTE: If you implement this feature in Release 13.3R3, contact JTAC prior

to upgrading to Release 14.1R1 or later.

Layer 2 Features

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Computation of the Layer 2 overhead attribute in interface statistics (T

Series)—Starting in Junos OS Release 13.3, on T Series routers, you can configure an

attribute at the PIC level to include the Layer 2 overhead (header and trailer bytes) in

the physical interface and logical interface statistics for both ingress and egress

directions. Both the transit and total statistical information includes the Layer 2

overhead in the output of the show interfaces interface-name command for each physical

or logical interface on that PIC.

The ifInOctets and ifOutOctets MIB objects display statistics that include Layer 2

overhead bytes.

MPLS

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Multisegment pseudowire for FEC 129 (M Series, MX Series, and T Series)—Junos

OS Release 13.3 and later releases provide support for establishing a dynamic

multisegment pseudowire (MS-PW) with FEC 129 in an MPLS packet-switched network

(PSN). The stitching provider edge (S-PE) devices in an MS-PW are automatically and

dynamically discovered by BGP, and the pseudowire is signaled by LDP using FEC 129.

This arrangement requires minimum provisioning on the S-PEs, thereby reducing the

configuration burden that is associated with statically configured Layer 2 circuits while

still using LDP as the underlying signaling protocol.

The MS-PW feature also provides operation, administration, and management (OAM)

capabilities, such as ping, traceroute, and Bidirectional Forwarding Detection (BFD),

from the terminating PE (T-PE) devices of an MS-PW.

[See Example: Configuring a Multisegment Pseudowire.]

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Control word for BGP VPLS (M320 and MX Series)—For hash calculation, transit

routers must determine the payload. While parsing an MPLS encapsulated packet for

hashing, a transit router can incorrectly calculate an Ethernet payload as an IPv4 or

IPv6 payload if the first nibble of the DA MAC is 0x4 or 0x6, respectively. This false

positive can cause out-of-order packet delivery over a pseudowire. Starting in Junos

OS Release 13.3R3, this issue can be avoided by configuring a BGP VPLS PE router to

New and Changed Features