Alcatel-Lucent 1643 AMS Applications And Planning Manual page 106

Product description
Flexible Bandwidth Assignment
The X5IP option card supports flexible assignment of VC capacity to create various
size VCGs. The available capacity of one VC4 can be divided in three TUG3s. Each
TUG3 can be used a single VC3 or as 21 VC12s.
These VC3 and VC12 containers can be assigned to a maximum number of 8 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 / 1643 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 / 1643 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.
LAN modes
The X5IP option card supports the following LAN modes.
• LAN bridge mode
• LAN promiscuous mode
LAN bridge mode
According to the IEEE802.1D standard, the Ethernet bridge provides the following
functions.
• Point-to-point LAN bridge
• Multiport bridge for 13 ports
• MAC address filtering via self learning protocol (up to 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.
LAN 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 and can be configured for each
switch relation.
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4-26 Alcatel-Lucent - Proprietary
See notice on first page
X5IP option card
365-312-801R7.2
Issue 3, May 2007