Cisco Systems Network Router manual Connection Limit Adjustments

Chapter 2 Interoperability and Performance Planning

Connection Limit Adjustments

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
Total connections per switch (SVCs	50 K	50 K	100 k	100 k
and SPVCs)1
Physical ATM interfaces per switch	100	100	100	100
(maximum)
Preferred routes per switch	—	—	1000	1000
(maximum)
P2MP root connections per switch	—	—	—	500
P2MP branches per switch	—	—	—	12
P2MP parties allowed per root	—	—	—	100
connection
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.

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 2-3shows how the switch and CWM account for each connection type.

Table 2-3 Switch and CWM Connection Units for Each Connection Type

Connection Type	Switch Connections	CWM Endpoints
SVC	1	0
Pass-through	1	0
connection1
Routed SPVC	1	1
DAX SPVC2	1	2

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.

2.A digital cross-connect (DAX) SPVC is an SPVC built between two interfaces on the same switch.

	Cisco PNNI Network Planning Guide for MGX and SES Products, Release 5
2-4	Part Number OL-3847-01 Rev. D0, April, 2004