Specifications

Overview
ExtremeXOS 12.4.1 Release Notes
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optical transceiver modules. Not all transceivers support DDMI capability. In ExtremeXOS 12.4.1,
DDMI is supported only on XFPs.
● Domain Name Service (DNS) Client Support for IPv6—DNS client support for IPv6 provides
ExtremeXOS applications the ability to convert hostnames to IP addresses by querying an external
DNS server.
● Equal Cost Multi-path (ECMP) Scaling— This scaling feature increases the number of IPv4 longest
prefix match (LPM) routes that can use equal cost multi-path (ECMP) by sharing common ECMP
gateway "sets" in hardware. This feature is supported on the following platforms:
BlackDiamond 8000 a- and e-series modules, BlackDiamond 8800 c-series modules, BlackDiamond
8900 modules, BlackDiamond 20800 modules, and Summit X250e, X450a, X450e, X480, and X650
switches.
● Extreme Loop Recovery Protocol (ELRP) Port Shutdown—ELRP port shutdown allows you to
monitor individual VLANs for loops. In addition to log and trap notifications, this feature provides
the option of disabling a port on loop detection.
● Hitless Failover with Nettools—Hitless failover with Nettool protects a switch from rebooting when
the Nettools process fails, providing a moderate level of hitless failover.
● Identity Management—This feature allows you to track users or devices that access a network based
on device name or user name (that is, user identity). User identity is captured based on network
login authentication, Link Layer Discovery Protocol (LLDP) discovery, and Kerberos snooping. The
user or device identity is mapped to its associated IP address, MAC address, computer hostname,
domain name, VLAN, and switch port location of the users. This information can also be sent to
EPICenter for centralized reporting.
● IPv6 Routes With Masks Greater Than 64 Bits—BlackDiamond 8900 modules and Summit X650
and Summit X480 support hardware forwarding for these routes by using dedicated hardware.
BlackDiamond 8000 a- and e-series modules, BlackDiamond 8800 c-series modules and
Summit X250e, X450a, and X450e switches also support hardware forwarding for up to 256 routes
with masks greater than 64 bits by sharing the hardware used for ACL support.
● Medium-Specific Configuration CLI—Medium-specific configurations on combo ports allows users
to select the medium (fiber or copper) they want to configure. Configuration for each medium is
stored separately and simultaneously. This feature is only supported on Summit platforms having
combo ports.
● MIB Support for Connectivity Fault Management (CFM)—This feature provides read access for
CFM MIB objects via SNMP.
● Multicast Debug Tools—The multicast trouble shooting tools mrinfo and mtrace are now included
in the implementation of multicast manager. Mtrace is the multicast equivalent of unicast "trace
route" mechanism and is an effective tool for debugging multicast reachability problems. The
multicast router information tool, mrinfo, requests information from a router.
● 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—This feature 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.
● Provider Backbone Bridge (PBB) Support on a BlackDiamond 20808 Switch—A PBB network
enables vMAN transport over the internet, and 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 over which the subscriber’s
frames are transported. The PBB network technology is sometimes referred to as MAC-in-MAC.