Cisco Systems MGX 8230 manual Redundancy for Frame Service Modules, Connection Types on the Frsm

Chapter 2 Module and Service Descriptions

Frame Relay Service Modules

•Standard ABR (TM 4.0 compliant).

Note Note: the Foresight option is not available on MGX-FRSM-HS1/B.

Redundancy for Frame Service Modules

FRSMs can have either hot standby, 1:1 redundancy, or 1:N redundancy.

•For 1:1 redundancy, a Y-cable is necessary.

•MGX-FRSM-2CT3, MGX-FRSM-2T3E3, and MGX-FRSM-HS2 use 1:1 Y-cable redundancy.

•For 1:N redundancy, an MGX-SRM-3T3/C is required (no Y-cabling).

•Differences may exist in the way the MGX-SRM-3T3/C supports redundancy for a particular T1 or E1 configuration. Refer to the section titled “Service Resource Module” in this chapter and the Service Resource Module description in Chapter 6, “Card and Service Configuration”

Note The MGX-FRSM-HS1/B does not support redundancy.

Hot Standby

For hot standby, place the card sets in slots on the same card shelf and connect using an appropriate Y-cable to connect each hot standby pair. To view the hot standby status of the system, use the dsphotstandby command.

1:1 Redundancy

For 1:1 redundancy, place the card sets in adjacent slots and connect a Y-cable for each pair of active and standby ports. On the CLI, configure the card for redundancy by executing the addred command. For instructions on how to use the CiscoView application to configure redundancy, refer to the CiscoView user-documentation.

1:N Redundancy

1:N redundancy for the eight-port FRSMs requires an MGX-SRM-3T3/C. With 1:N redundancy, a group of service modules includes one standby module. For installation requirements, see “Service Resource Module, page 2-12”. For configuration requirements, see the section on the MGX-SRM-3T3/C in Chapter 6, “Card and Service Configuration”

Connection Types on the FRSM

The following sections describe NIW, SIW, FUNI, and Frame forwarding. Topics include translation and congestion management.

•Frame Relay-to-ATM Service Interworking, page 2-24

•ATM Frame-to-User Network Interface, page 2-26

•Frame Forwarding, page 2-26

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
2-22	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001