Installation guide

Trunk Cards 4-17
Universal Switching Module Enhanced
Figure 4-7 shows an example of IMA protocol overhead. In the example, DS0 1 is reserved for an
IMA group with 1 to 4 physical lines and DS0 2 is reserved for an IMA group with 5 to 8 physical
lines.
Figure 4-7 IMA Protocol
Supported Segment Connections on the IGX Feeder Node
Figure 4-8 shows an example of configuring a two-segment connection for IGX feeder node
functionality.
Figure 4-8 Sample Two-Segment Connections
Table 4-8 lists the corresponding routing and feeder endpoints with applicable gateway and load
types and also connection types.
Table 4-8 Two-Segment Connections
Routing
Endpoint A
Feeder
Endpoint B
Connection
Type
VCC
or
VPC Gateway Type
Cell
Routing Load Type
UXM-E UXM-E CBR Both GW_TYPE_NONE True CBR_LOAD
BXM RT-VBR GW_TYPE_NONE True CBR_LOAD
NRT-VBR GW_TYPE_NONE True VBR_LOAD
ABR.STD GW_TYPE_NONE True ABR_LOAD
ABRFST GW_TYPE_NONE True ABR_LOAD
UBR GW_TYPE_NONE True UBR_LOAD
UXM-E UXM-E ATFR N/A GW_TYPE_NWI N/A BDATA_LOAD
6 1
15
26
3
4
6 1
IGX-hub
Trunk 8.1-4
IGX-feeder
29453
U
X
M-
E
U
X
M-
E
U
X
M-
E
U
X
M-
E
IGX-feeder
BNI/
BXM/
UXM-E
BA
UXM-E/
BXM
Routing
network
29455
U
X
M-
E