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A stand-alone application is defined as one in which the MGX 8220 shelf is connected to some device (router or ATM switch) other than a BPX 8620.
The interface between MGX 8220 shelf and the connected device must be ATM UNI/NNI over either T3, E3, nxT1, nxE1, OC-3c as shown in Figure 6-1.
This chapter provides guidance in those areas of configuration that are peculiar to the stand-alone configurations. In general, these break down into:
This chapter makes considerable reference to the MGX 8220 Command Line Interface commands. Details of these commands can be found in the Cisco MGX 8220 Command Reference.
A stand-alone MGX 8220 shelf cannot be configured from Cisco StrataView Plus and must be configured using the MGX 8220 Command Line Interface (CLI). This may be achieved either through an in-band connection over the ATM link, or through one of the out-of-band options (maintenance, control or Ethernet ports on the ASC).
To create an in-band access to the MGX 8220 shelf:
1. Use an out-of-band method to configure the MGX 8220 IP address to 37. Use the cnfifip command.
2. Configure the IP address on the connected router or ATM switch
3. The MGX 8220 shelf uses a VPI of 3 and VCI of 8 for in-band access. The connected router or ATM switch must be able to support these values. Configure the router or switch for these VPI/VCI values.
4. From the ATM network, telnet into the MGX 8220 address. The login prompt should appear.
The MGX 8220 options for out-of-bound access are:
Refer to Chapter 3, "Managing the MGX 8220 Shelf ".
In stand-alone applications, the Annex-G ATM LMI must be disabled in order to suppress ATM LMI related connection alarms. This is achieved by looping back Annex-G LMI messages within the MGX 8220 shelf. Use the addlmiloop command.
The loopback can be confirmed with the dsplmiloop command and the response of "AtmLmiLoopBack: Loop".
In stand-alone applications, the BNM card interface format must be configured to UNI before connections can be provisioned. Use the cnfbnmif command and specify the "interface format" parameter as 2 (for UNI).
If the BNM-T3 card is being used, the ATM line must be configured with PLCP.
The interface format can be confirmed with the dspbnmif command and the response of "bnmLineInterfaceFormat: bnmUni"
In stand-alone applications, trap managers are configured through the CLI using either the cnftrapmgr command or the addtrapmgr command.
Trapmanagers registered (added) using the cnftrapmgr command will age. That is to say the trap manager will be disabled automatically after 30 minutes and must be reregistered if it is to continue to exist. The function of reregistering is normally accomplished by StrataView Plus, but, since StrataView Plus cannot be used for stand-alone applications, there is no method for reregistering trap managers.
In stand-alone applications, therefore, the addtrapmgr command should be used to register a trap manager. Using this command the trap manager does not age and exists until deregistered by the deltrapmgr. Once registered by the addtrapmgr command it can be modified by the cnftrapmgr command and the trap manager will still not age.
Current trap managers can be displayed using either the dsptrapmgrs or dsptrapmgr commands. The dsptrapmgrs command displays all current trap managers but does not include timeout information. The dsptrapmgr command displays the status for a single specified trap manager including the timeout status.
Refer to the Cisco MGX 8220 Command Reference for details of these commands.
When creating connections on the MGX 8220 shelf the user does not explicitly assign VPI and VCI values. Instead, the MGX 8220 shelf takes user entered values such as DLCI, LCN, and so forth, and uses mapping algorithms to calculate VPI/VCI values. In stand-alone applications, the user needs to know how this mapping works since these VPI and VCI values must be configured into the connected router or ATM switch.
For FRASM and AUSM VC connections, the user associates a logical channel number (LCN) with the connection DLCI for a service module in a particular slot. The card's slot number is used as the value for the VPI and the LCN is used as the value for the VCI.
The VPI, therefore, is a number in the range of 5-14 (the range of permissible slots for service modules in the MGX 8220).
The VCI range is determined by the service module type and is 16-271 for 4 port FRAM and
AUSM modules and 16-1015 for 8 port modules.
For AUSM VP connections, the situation is slightly more complicated. The CPE port VPI value will most likely be different from the network VPI. Depending upon the BNM interface format (UNI or NNI), the range of VPI values is evenly divided among the 10 service module slots. During the process of adding a VP connection, the user is asked to assign a VP ID where the VPID is an index corresponding to the VPI within the assigned range.
The ranges of VPID for the various service modules are shown in Table 6-1.
| Interface Type | VPID | |
|---|---|---|
| AUSM-4T1E1 | AUSM-8E1T1 | |
UNI | 1 - 20 | 1 - 20 |
NNI | 1 - 255 | 1 - 340 |
There are two methods that can be used to identify the network VPI associated with an AUSM VP connection.
The first method is to use the dspadrxlat command. This command lists all the VC and
VP connections currently existing on the shelf in slot number/channel number order showing the connection type and the VPI value for each connection.
For example, the command
could result in the following response
| Chan | Connection Type | VPI |
|---|---|---|
1.8.16 | vpConnection | 76 |
The second method is to calculate the VPI from the slot number and VPID value as follows.
For UNI interface format:
VPI = (slot number - 5) * 20 + (VPID - 1) + 16
For NNI interface format:
VPI = (slot number - 5) * 340 + (VPID - 1) + 16
To provision a FRSM channel in a stand-alone application:
1. Use the cc command to change the active CLI card to the slot number corresponding to the channel to be provisioned. For example:
2. Use the addport command to add a frame relay port to the enabled line. Then use the dspports command to verify the port has been added. For example:
3. Use the addchan to add a frame relay "endpoint". Then use the dspchans command to verify the channel has been added. For example:
To provision a AUSM channel in a stand-alone application:
1. Use the cc command to change the active CLI card to the slot number corresponding to the channel to be provisioned. For example:
2. Use the addln command to add a physical line (line number corresponds to the physical line module port number for the channel being provisioned). Then use the dsplns command to verify the line has been added. For example:
3. Use the addport command to add a ATM port to the enabled line. Then use the dspports command to verify that the port has been added. For example:
4. Use the addchan to add a ATM "endpoint". Then use the dspchans command to verify the channel has been added. It is in this command that the VPID is specified. For example:
Posted: Mon Jan 15 16:31:52 PST 2001
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