Installation guide

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Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
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Chapter 3 Installing the IGX
IGX Configuration Summary
Interworking Connections in a Tiered Network
Two approaches are available for establishing a Frame Relay-to-ATM interworking connection in a
tiered network. The simplest approach is to use the Connection Manager in Cisco WAN Manager. When
you specify a connection to a Frame Relay service module (FRSM) on a Cisco MGX 8220 edge
concentrator, Cisco WAN Manager directs the node to establish the correct end-to-end connection type.
This connection type is either atfr (ATM-to-Frame Relay interworking) or atfst (ATM-to-Frame Relay
interworking with ForeSight). The other approach is to use the command line interface on the IGX node
or other routing node to run addcon and related commands (such as cnfcon) to establish the connection
between routing nodes. A network interworking connection requires that you specify each individual
segment of the connection. (Establishing the connection between the FRSM on the Cisco MGX 8220
and the BPX node requires you to run the addchan command on the Cisco MGX 8220.)
Configuring an IGX Switch to Be an Interface Shelf
An interface shelf is a nonrouting, concentrator shelf that communicates ATM cells to and from a BPX
or IGX routing hub in a tiered network. (An interface shelf is also known as a feeder shelf.) An interface
shelf is an IGX node configured to be an interface shelf. The MGX 8220 edge concentrator is also an
interface shelf. IGX/AF is the designation of an IGX interface shelf.
For an IGX node to serve as an interface shelf, personnel in the TAC must first configure the node for
that purpose because tiered network capability is a purchased option.
You can add an interface shelf from Cisco WAN Manager or the command line interface (CLI). The
steps for adding a new interface shelf to a network are:
Step 1 Activate the trunk between the interface shelf and routing hub. On the CLI, use the uptrk command.
(Note that you do not subsequently use the addtrk command for the interface shelf.)
Step 2 Configure the trunk for STI cell headers and BPX Addressing Mode (BAM).
Step 3 Add the IGX/AF to the hub (after the TAC has enabled this feature) by using the addshelf command.
You add the shelf from the routing hub.
Figure 3-23 illustrates the sequence of using the addshelf command either locally or remotely to add
one or more interface shelves. To delete an interface shelf, use the delshelf command after you delete
connections and the active interfaces. To view status of an interface shelf, run the dspnode command
at the routing hub. (The dspnw command shows an alarm on a node but does not specify an interface
shelf.)
Figure 3-23 Add an Interface Shelf from the Hub
Log on to
a node
Local or
remote?
End
Another
node?
Local
Remote
Yes
No
VT
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ADDSHELF