Link Special Cases; Imatm Trunks - Cisco OL-10426-01 User Manual

Link Special Cases

Table 4-3
Field Defaults Notes
AW 5040 O
Comment
Link Special Cases
This section describes link table configuration for the following special cases:
•
•

IMATM Trunks

An IMATM trunk is an ATM link of one to eight DS1 lines. Each IMATM trunk card uses a slot of an
AXIS shelf, and is connected to the BPX switch by means of a T3/E3 port on a BNI card. The trunk can
be configured so it fails only if more than n DS1 lines fail. The NMT does not model IMATM trunk
resiliency during failure analysis.
Table 4-4
Topic
Specifying an IMATM Trunk Links table
Cisco WAN Modeling Tools Guide
4-10
Link Table (continued)
Description and Comments
Administrative weight used for least
cost in the PNNI routing algorithm.
A free field comment field. Translates
to the WANDL link label field if
present.
ATM Trunks
Virtual Trunks
IMATM Trunk Configuration
DBF
AW
COMMENT
Required Settings
Trunk (type) field: Specify a trunk of
T1 or E1. Prepend the number of
DS1s for the trunk, for example 5:T1
or 8:E1.
Trunk (capacity) field: For E1 links,
specify number of DS0 in the line: 30
for CCS signalling or 32 for Clear
Channel signalling.
Trunk card field: Specify IMA for
both trunk front cards.
IMA_RD field: enter the resiliency
degree.
Chapter 4 Configuration Tables and Fields
CET TPI
Not available The comment
until sv+ Release field is used as the
9.0. link label in the
bblink file. If this
field is blank, a
link label will be
generated only if
it is required to
uniquely
determine the link
in WANDL.
Comments
Both sites must be BPX.
The IMA_RD field is on the
second screen of the Links table.
OL-10426-01, Rev. A0