Lucent Technologies 6000 - Manual (Page 189)

Configuring Individual WAN Connections
Configuring MP, MP+ and BACP connections
MAX 6000/3000 Network Configuration Guide 4-57
When you have created or modified a nailed profile in RADIUS, you must reload the
information from the RADIUS server. To request a reload of all nailed profiles (permanent
connections) from the RADIUS server, select the command Sys > Sys Diag > Upd Rem Cfg.
Spanning multichannel calls across a stack of units
If you configure multiple MAX units to form a stack, the multiple channels of an MP or MP+
call can span the units in the stack, as shown in Figure 4-4.
Figure 4-4. A MAX stack for spanning MP or MP+ calls
Call spanning with a stack configuration can be effective when:
• A MAX unit running MP+ asks for another telephone number, and has no available lines.
• A rotary hunt group uses the same telephone number to access multiple units, making it
impossible to assume that the same unit that answered the original call answers a
subsequent call.
MP/MP+ call spanning is protocol independent and works with all protocols supported by the
unit.
Note: Stacking requires any MP caller to use the MP endpoint discriminator. The same is true
of MP+. All Lucent products and most other products that support MP or MP+ use an endpoint
discriminator, but the specification for MP does not require it.
How MP/MP+ call spanning works
A stack is a group of MAX units that have the same stack information and are on the same
physical LAN. There is no master unit. The MAX units in the stack use a directed-broadcast
Ethernet packet to locate each other. Directed broadcast packets usually cannot cross a router,
so the units in a single stack must be on the same physical LAN. MAX units running in a stack
can generate fairly high levels of network traffic, which is another reason to keep them on the
same physical LAN.
Bundle ownership
Although MAX stacks do not have a master MAX unit, each bundle of channels in a MP/MP+
configuration has a bundle owner. The unit that answers the first call in the MP/MP+ bundle is
the bundle owner. If a bundle spans more than one unit in a stack, an exchange of information
flows between the units in the bundle.
MAX
MAX
MAX
WAN
MAX