Enterasys Networks Enterasys Platinum Distributed Forwarding Engine 7G4285-49 - Manual (Page 37)

DFE Module Placement and Installation Rules
DFE-Platinum Series Hardware Installation Guide 3-5
Example 4 ( Figure 3-1
,
D)
Shows chassis slots 1 through 5 populated with a mix of 6x1xx, 6x2xx, and 6x3xx modules
and only third generation modules in slots 6 and 7.
In this module arrangement, the 6x3xx module provides a proxy bridge, which enables
the 6x1xx and 6x2xx modules to communicate with 6x3xx modules in slot 6 or 7. If more
than one 6x3xx module is installed in slots 1 to 5, the module in the lowest numbered slot
performs the proxy function for slots 6 and 7. Therefore, if a 6x3xx module is already
performing the proxy function, and another 6x3xx module is inserted into a lower
numbered slot, connectivity will be temporarily interrupted, as the new board takes over
the proxy function. When a 6x3xx module in a lower numbered slot is removed, and there
is a 6x3xx module in a higher numbered slot, communication is not interrupted.
For Local Management, plugging the Local Management connection into the 6x3xx
modules will allow management connections to all 6x1xx, 6x2xx, and 6x3xx modules. If
the Local Management connection is to a 6x1xx or 6x2xx board, only the modules in the
first five slots will be recognized by the management client.
Rule: There must be at least one 6x3xx module in slots 1 through 5 to enable
communications between the 6x1xx, 6x2xx, and 6x3xx modules.
Example 5 ( Figure 3-1 , E)
Shows chassis slots 1 and 5 populated with 6x2xx and 6x1xx modules, respectively; slots 2
through 4 with DFE modules without a bridging module; and slots 6 and 7 with 6x3xx
modules.
In this module arrangement, the 6x2xx and 6x1xx modules in slots 1 and 5 can only
communicate with each other, because there is no 6x3xx module in one of the first five
slots to serve as the proxy bridge to communicate with the 6x3xx modules in slots 6 and 7.
The 7x4xxx DFE modules in slots 2, 3, and 4 will operate under one IP address. Since there
is no DFE bridging module, the DFE modules will not communicate with any other
modules in the chassis.
Rule: In this example, there must be at least one 6x3xx series module, and a bridging
module in any of the slots 1 through 5 to enable communications between all generations
of modules in the chassis.
Example 6 ( Figure 3-1 , F)
The module arrangement in this example is similar to the one shown in Figure 3‐1 , E and
described in Example 5. The only difference is that one of the bridging modules
(7H4382‐25, 7H4385‐49, 7H4383‐49, or 7H4385‐49) is installed in slot 2, enabling all
modules to communicate with each other. The 7H4385‐49 is used in this example.
Rule: In this example, the bridging module serves as both the FTM1‐to‐FTM2 bridge and
the five‐to‐seven slot proxy bridge. The 6x3xx does not serve as a proxy bridge in this
configuration because the bridging module is in a slot with a lower number.