Beta Draft Confidential
19-61/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
CUGs
Configuration Overview
Configured Addresses and CUG Membership
Using the CUG design depicted in Figure 19-1 on page 19-4, Table 19-3 illustrates
how a single configured address can match multiple member rules, and can belong to
more than one CUG.
Member rules that specify an address prefix only can simplify call routing since the
logical port only needs to check the address prefix digits to route the call. However,
CUG membership must be recalculated at call time if the port to which this address is
routed contains other CUGs with member rules that begin with the digits 1616.
For example, if a CUG contains a member rule that uses a prefix format (for
example,1616*) as well as other member rules that are more specific (1616349*), you
are likely to encounter performance issues due to address ambiguity.
The more specific you make the CUG member rules, the more quickly CUG
membership can be determined.
Table 19-3. Configured Address and Corresponding CUG Membership
Address OA IA CUG ICB OCB
15085551212 N Y A N N
DNN
16165551212 Y N B N N
DNN
15082178989 N N A N N
16161234567 Y N B N N
16163498888 Y N B Y Y
CNN
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