Cisco Systems MGX 8800, MGX 8900 - page 220

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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter2 Illustrated Card List for MGX Switches and the MGX 8880 Media Gateway
Front Cards
The XM60 provides the following features:
•Support for 60, 120, 180, or 240 Gbps of cross-point switching capacity
•Dynamic sharing of capacity across multiple XM60s, allowing for 3:1 redundancy
•Data forwarding capabilities in the event of a control processor failure, since the switching module
is separate from the control processor
•An aggregate bandwidth of 10 Gbps per slot
•Four switch ASICs and four serial links to each AXSM slot (one serial link per switch ASIC)
•Two serial links to PXM45 cards from the upper two XM60s (slots 9 and 10)
The XM60 performs the following functions:
•Extracts in-band requests from the AXSM cards and PXM45 cards
•Schedules and grants access to the AXSM cards and PXM45 cards
•Performs spatial multicast functions to the egress slots
•Provides counters for error statistics on a per serial link basis
•Provides an interface to the CPU on the PXM45 cards for statistic collections
Note The MGX 8950 switch and XM60 card require PXM45/B or PX M45/C cards.