Specifications

Overview
ExtremeXOS 12.4.4 Release Notes
9
● Multiprotocol Label Switching (MPLS) Support for Standalone Summit X480 Series Switches—
MPLS support is now available on standalone Summit X480 series switches.
● MPLS Support for Running on a Virtual Router (VR) Other than a Default VR—MPLS runs on
one VR at a time, but can now be deleted from the default VR and added to a user-created VR.
● PIM-DM State Refresh—Periodically refreshes the prune state for multicast groups. Without this
feature, bandwidth is lost to periodic broadcast and prune cycles that occur when the prune state
times out.
● Policy-Based Routing (PBR)—Allows user to bypass standard Layer 3 forwarding decisions for
certain flows. Typically, in a Layer 3 environment, when an IP packet hits an Ethernet switch or
router, the Layer 3 processing determines the next hop and outgoing interface for the packet based
only on the packet's destination address.
● Provider Backbone Bridge (PBB) Support on a BlackDiamond 20808 Switch—Enables VMAN
transport over the internet. PBB network is defined by the IEEE 802.1ah Backbone Bridge standard,
which is an amendment to the IEEE 802.1Q VLAN standard. This standard allows Internet Service
Providers (ISPs) to use Ethernet to create a separate backbone for transporting subscriber frames.
The PBB network technology is sometimes referred to as MAC-in-MAC.
● sFlow Support for the BlackDiamond 20800 Series Switch—sFlow support is now available on
BlackDiamond 20800 series switches.
● Simple Network Management Protocol (SNMP) Support for IPv6—Provides ability to manage an
IPv6 agent from an IPv6 SNMP manager. The agent supports IPv6 for communication of SNMP
management requests.
● Simple Network Time Protocol (SNTP) Client Support for IPv6—Provides ExtremeXOS SNTP
clients the ability to get the current time by querying an NTP server running over IPv6.
● Spanning Tree Protocol (STP) Edge Safeguard Enhancements—Allows STP edge safeguard to
disable a port as soon as a bridge protocol data unit (BPDU) is received by allowing a new CLI
keyword
bpdu-restrict. It also provides a timer option to re-enable a disabled port.
● vMAN Terminology Change—vMAN is an Extreme Networks term used to refer to double-tagged
VLAN traffic. The 802.1ad Provider Bridged Network (PBN) standard also describes metropolitan
area network technologies that are similar to vMAN. The vMAN and PBN terms are used
interchangeably in ExtremeXOS documentation.
● vMAN Enhancements—Allow configuration of tagged VLANs and untagged vMANs on the same
physical port. Enhancements also allow configuration of tagged VLANs and tagged vMANs on the
same physical port when the VMAN ethertype is not 0x8100.
● VPLS MIB Support—Enables SNMP to obtain information about Layer 2 (L2) VPNs. These MIBs
identify the pseudo-wires that are part of an L2 VPN. The MIBs also enable the association of a
pseudo-wire with its transport link state PDU (LSP). Extreme proprietary MIBs allow user to identify
primary and secondary LSPs in an RSVP LSP group. Support has also been added for pseudo-wire
up and down traps (SNMP notifications).
● VPLS with STP Redundancy—Provides a reliable method of directly connecting an STP-protected
VLAN to a VPLS network. Redundant VPLS nodes work with STP to handle topology changes in a
customer network, including informing other VPLS nodes when an FDB flush is required. There is
also no longer a CLI restriction preventing configuring a VPLS service on an STP-protected VLAN.
● Virtual Router Redundancy Protocol (VRRP) Preempt Delay Option—Provides ability to configure
a delay time before preempting a lower priority master. Preempt delay is configurable on a per
VRRP instance. This option avoids black holing traffic when an active gateway (for example, a router
with a higher priority) recovers and preempts the backup router before the active gateway is fully
operational.