The ESW4_E14 option card supports overlength Ethernet frames (also known as
Jumbo frames) on all LAN ports and on WAN ports 3, 4, 7, and 8.
The ESW4_E14 option card can compensate a maximum delay difference of 64 ms
between the fastest and the slowest VC in receive direction.
Enhanced flow classification
The ESW4_E14 option card supports Enhanced Flow Classification - 802.1Q mode and
802.1 ad mode. It supports the Flow Control and Pause Frames feature on LAN ports
and provides Wire speed performance for forwarding, flooding, address look-up, and
flow look-up requirements. The flow classifcation is based on port and priority, port
and port, and port and VLAN-ID. The flow classification can be checked on a flexible
set of combinations such as IP_TOS, VLAN-ID, VLAN-UPT, and DA-MAC. The flow
bucket can be set to handle 8k to 16k. However, an increased flow bucket size will
decrease performance. The ESW4_E14 option card is IEEE802.1Q/1ad compliant and
supports VLAN and/or ETHER_TYPE switching and adding or removing VLAN tags.
Auto-negotiation
The ESW4_E14 option card supports Auto-negotiation. The Auto-negotiation function
automatically configures the Ethernet interface parameters to establish an optimal
Ethernet link based on the capabilities of the near-end and far-end Ethernet interfaces.
Auto-negotiation for twisted-pair systems, defined in Clause 28 of the Standard
802.3-2002, has been extended to include all three speeds of Ethernet that are
supported over twisted-pair cable: 10Mbit/s 10Base-T, 100Mbit/s 100Base- TX, and
1000 Mbit/s 1000Base-T. For more information about Auto-negotiation, please refer to
the Metropolis
®
AMU User Operations Guide.
Link Capacity Adjustment Scheme (LCAS)
The ESW4_E14 option card supports a flexible allocation of SDH bandwidth to LAN
ports by making use of the Link Capacity Adjustment Scheme (LCAS, see
). All LAN ports have the same capabilities. Each WAN port supports
VC-12-Xv (X = 1...63), VC-3-Xv (X = 1...9), VC-4-Xv (X = 1...7).
Repeater mode
For units containing Ethernet switches, it is possible to emulate the behaviour of a
private line port by creating a two-port virtual switch, with one LAN and one WAN
port and provision it in Repeater Mode. This feature can be implemented in both
Ethertype 8100 and Ethertype 9100 mode. In this mode, all traffic from the LAN or
WAN side is transparently passed through, except the pause messages. The Pause
protocol operates on the LAN interface and therefore, transmission without loss can be
obtained if the peer node on the LAN link obeys the commands contained in pause
messages.
GFP encapsulation
GFP provides a generic mechanism to adapt traffic from higher-layer client signals
over a transport network. GFP encapsulation is implemented according to
T1X1.5/2000-147.
Product description
Introduction
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2-24
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006
