2-4
Cisco PNNI Network Planning Guide for MGX and SES Products, Release 5
Part Number OL-3847-01 Rev. D0, April, 2004
Chapter 2 Interoperability and Performance Planning
Connection Limit Adjustments
Connection Limit Adjustments
For MGX software Release 3.0 and above, and CWM Release 12.0, Patch 1 and above, the unit for
connection limits is different for the switch and for CWM.
Note
The connection limit adjustments described in this section apply only to CWM-managed switches. If you
are not using CWM to manage switches, you can ignore this section.
For switches, the connection limit units are connections. For CWM, the connection limit units are
persistent endpoints. For example, a switch can support 250K connections, and CWM can support 250K
persistent endpoints per switch.
Table 2-3
shows how the switch and CWM account for each connection type.
Total connections per switch (SVCs
and SPVCs)
1
50 K
50 K
100 k
100 k
Physical ATM interfaces per switch
(maximum)
100
100
100
100
Preferred routes per switch
(maximum)
—
—
1000
1000
P2MP root connections per switch
—
—
—
500
P2MP branches per switch
—
—
—
1
2
P2MP parties allowed per root
connection
—
—
—
100
P2MP parties per switch
—
—
—
1 K
1.
Connections limits are calculated differently for a switch and for CWM. For more information,
refer to the following section, “
Connection Limit Adjustments
.”
2.
SES equipped BPX switches do not support branching.
Table 2-2
PNNI Networking Specifications for SES Equipped BPX Switches (continued)
BPX/SES
Capabilities
SES 1.0
SES 1.1
SES 3
SES 4
Table 2-3
Switch and CWM Connection Units for Each Connection Type
Connection Type
Switch Connections
CWM Endpoints
SVC
1 0
Pass-through
connection
1
1.
Pass-through connections are connections that do not terminate on a switch. These connections
terminate on other switches in the network and merely “pass through” the local switch.
1
0
Routed SPVC
1
1
DAX SPVC
2
2.
A digital cross-connect (DAX) SPVC is an SPVC built between two interfaces on the same switch.
1
2
