Cisco Systems 8600 Series manual IPX Interface Shelf Description, ForeSight, Preferred Routing

BPX Routing Hubs in a Tiered Network

ForeSight

Foresight for an IPX interface shelf terminated Frame Relay connections is provided end-to-end between Frame Relay ports, regardless as to whether these ports reside on an IPX interface shelf or within the routing network.

Preferred Routing

Preferred routing within the routing network can be used on all connections. Priority bumping is supported within the routing network, but not in the interface shelves. All other connection features such as conditioning, rrtcon, upcon, dncon, etc. are also supported.

Local and Remote Loopbacks

Connection local and remote loopbacks are managed at the user interface of the FRP endpoint routing node or interface shelf. The existing IPX Frame Relay port loopback feature is supported on the IPX interface shelf. Remote loopbacks are not supported for DAX connections. A new command addlocrmtlp is added to support remote loopbacks at FRP DAX endpoints.

Testcon and Testdly

Tstcon is supported at the FRP endpoints in a non-integrated fashion and is limited to a pass/fail loopback test. Fault isolation is not performed. This is the same limitation currently imposed on inter-domain connections. Intermediate endpoints at the AIT and BNI cards do not support the tstcon feature. Tstdelay is also supported for the FRP and ASI in a non-integrated fashion similar to that of the tstcon command.

IPX Interface Shelf Description

The IPX interface shelf supports the termination of Frame Relay connection segments to an AIT. DAX voice and low speed data connections are also supported, but they can’t terminate on an AIT. The IPX interface shelf connects to the routing network via an AIT card on the IPX switch and a BNI card on the BPX routing hub.

Admission control and ForeSight rate control for IPX interface shelf terminated Frame Relay connections is performed at the FRP port on the IPX interface shelf. Only a single trunk line is supported between the IPX interface shelf and the routing network. Trunks on the IPX interface shelf linking other nodes are not supported.

Frame Relay type connections, remotely or locally terminated are supported on IPX interface shelves. Interface shelf connections for which both endpoints reside on the same interface shelf are not known to the routing network and will not route through the routing network.

IPX interface shelves support the following network management features:

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Interval Statistics enable/disable/collection

IP Relay

Robust Object Updates

Robust Alarm Updates

Real-time Counters

Event Logging

Software/Firmware Downloads

13-6Cisco BPX 8600 Series Reference