Cisco MGX MGX 8800 Hardware Installation Manual page 378

Planning for Standalone and Redundant Line Configurations
Figure 4-8
Figure 4-8
Because the front cards are far more complex and expensive than the back cards, intracard APS is not
practical for most 1:1 redundant card installations. The use of intracard APS for most service modules
cuts the available port count in half.
The exception to the above rule is the VXSM-4-155, which uses two 4-port back cards to double its port
count. When intracard APS is used with VXSM-4-155, all four ports can be configured for intracard APS
without cutting the port count.
Figure 4-9
When planning an intracard APS configuration, consider the following requirements:
Not all cards support intracard APS.
•
support intracard APS.
For all cards except VXSM-4-155, the working line and the protection line must connect to adjacent
•
ports on the same back card.
Cisco MGX 8800/8900 Series Hardware Installation Guide
4-16
shows how a standalone AXSM connects to redundant lines.
Standalone AXSM with Intracard APS
AXSM front card Midplane
Standalone VXSM with Intracard APS
VXSM front card Midplane
Chapter 4 Planning for Card Redundancy, Line Redundancy, and Bulk Distribution
AXSM back cards
Figure 4-9 shows how a standalone VXSM connects to redundant lines.
VXSM back cards
Table 4-1 lists all the card types and specifies which cards
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Working line A
Protection line A
Working line B
Protection line B
Working line A
Working line B
Protection line A
Protection line B