mscAtmIfCAAbrAbrConnectionType 1.3.6.1.4.1.562.36.2.1.114.3.5.100.1.21

This attribute specifies the default type for ABR connections. It may be overridden by the abrConnectionType attribute under the Vcd Tm or Vpd Tm component, or by other configuration options. For example, for ABR end point connections originating at this switch, the Vcc Tm abrConnectionType will show sourceDest regardless of the setting of this attribute. If this attribute is set to abrSwitch, traversing ABR connections default to type abrSwitchEr or abrSwitchEfci, depending on the card type. If the interface to which traffic is directed across the backplane is configured as type virtualSourceDest and this is a ATM IP FP, then connection points under this AtmIf are activated as type virtualSourceDest. If this attribute is set to virtualSourceDest, traversing ABR connections may be instantiated as one of the following types: abrSwitchEr, abrSwitchEfci, or virtualSourceDest. A Virtual Source-Virtual Destination (VS/VD) boundary forms a break in the end to end flow of RM cells as defined in the ATM Forum Specification for Traffic Management Version 4.0. On ATM IP cards, a VS/VD boundary can be configured for a connection providing all of the following conditions are met: 1. the ABR connection is traversing (not terminating at) this interface; 2. both this interface and next hop interface to which traffic is directed across the backplane are located on ATM IP cards; 3. one or both connecting points are configured as virtualSourceDest, 4. the next hop interface to which traffic is directed across the backplane is not configured as nonAbrInterworking. If this attribute is set to nonAbrInterworking, this interface is defined as a point of interworking between an ABR and a non-ABR connection. In this case the next hop interface to which traffic is directed across the backplane is activated as type sourceDest. The Vcc Tm or Vpc Tm abrConnectionType operational attribute indicates what type of ABR connection was activated.