Cisco Systems 8600 Series manual IGX Interface Shelf Description, Preferred Routing

IGX Routing Hubs in a Tiered Network

Communication includes the real time notification of the addition or deletion of a connection segment and the ability to pass the availability (active state) or unavailability (inactive state) of the connections crossing this interface.

A proprietary extension to the Annex G protocol is implemented which supports the exchange of node information between an interface shelf and the routing network. This information is used to support the IP Relay feature and the Robust Update feature used by network management.

Network Management access to the interface shelves is through the IP Relay mechanism supported by the SNMP and TFTP or by direct attachment to the interface shelf. The IP Relay mechanism relays traffic from the routing network to the attached interface shelves. No IP Relay support is provided from the interface shelves into the routing network.

IGX routing hubs are the source of the network clock for its associated feeder nodes. Feeders synchronize their time and date to match their routing hub.

Robust Object and Alarm Updates are sent to a network manager which has subscribed to the Robust Updates feature. Object Updates are generated whenever an interface shelf is added or removed from the hub node and when the interface shelf name or IP Address is modified on the interface shelf.

Alarm Updates are generated whenever the alarm state of the interface shelf changes between Unreachable, Major, Minor and OK alarm states.

An interface shelf is displayed as a unique icon in the SV+ Network Management topology displays. The colors of the icon and connecting trunks indicate the alarm state of each. Channel statistics are supported by CVM, HDM, and LDM endpoints. Trunk Statistics are supported for the feeder trunk and are identical to the existing IGX trunk statistics.

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 voice or data endpoint Routing Node or interface shelf. The existing IGX voice and data port loopback features are supported on the IGX interface shelf.

Testcon and Testdly

Tstcon is supported at the voice and data endpoints in a non-integrated fashion and is limited to a pass/fail loopback test. Fault isolation is not performed. Intermediate endpoints at the BTM cards do not support the tstcon feature. Tstdelay is also supported for the in a non-integrated fashion similar to that of the tstcon command.

IGX Interface Shelf Description

The IGX interface shelf supports the termination of voice and data connection segments to a BTM. The IGX interface shelf connects to the routing network via a BTM and associated BMT-E1 back card on both the interface shelf and the IGX routing hub.

IGX interface shelves support the following network management features:

•Interval Statistics enable/disable/collection

Tiered Networks 13-13