Alcatel-Lucent 1643 AMS User's Operation Manual page 385

Traffic provisioning
These VC3 and VC12 containers can be assigned to a maximum number of eight
VCGs. For each VCG, users can choose between VC12-Xv (X=1-63) and VC3-Xv
(X=1-3), based on the total number of containers that are available for each container
type.
Link Capacity Adjustment Scheme (LCAS)
The 1643 AM/AMS supports the LCAS function for VC3-Xv concatenated signals on
the X5IP option card. According to ITU-T G.7042/Y.1305 standard, this function is
implemented using H4[1,4] bits of multiframe positions 2, 3, 8, 9, and 10.
The 1643 AM/AMS also supports the LCAS function for VC12-Xv concatenated
signals on the X5IP option card. According to ITU-T G.7042/Y.1305 standard, this
function is implemented using K4[2] multiframe bits 12 through 32.
The X5IP option card supports the latest LCAS standards as per ITU-Ts G.806 at
2006.3 and G.7042 at 2005.5 recommendations. The following enhancements are
implemented.
• G.806 at 2006.3: modified defect and alarm correlation process; hold-off timer is
now part of the defect-alarm process
• G.7042 at 2005.5: error corrections implemented.
LAN modes
The X5IP option card supports the following LAN modes.
• LAN bridge mode
• LAN promiscuous mode
Bridge mode
According to the IEEE802.1D standard, the Ethernet bridge provides the following
functions.
• Point-to-point LAN bridge
• Multiport bridge for ten ports
• MAC address filtering via self learning protocol (upto 8k MAC addresses)
• Spanning-tree algorithm
• Transparency to VLAN tagged packets from end customers
• Broadcasting, including end user BPDUs
All L2 switching relations can process packets at wire speed. In case of congestion on
a specific port, packets will be arbitrarily dropped from the tail.
Promiscuous mode
In addition to the L2 switching capabilities of the LAN bridge mode, the X5IP option
card supports operations in promiscuous mode. In this mode, the L2 switching function
forwards all Ethernet packets that are received without address filtering. This function
is only supported for a point-to-point switching relation.
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
Ethernet over SDH
8-33