Specifications

MGX 8220 in Stand-alone Applications 6-3
Setting Trap Managers
Setting Trap Managers
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.
VPI/VCI Mapping
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.
VC Connections
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.
VP Connections
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 Table6-1.