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21-181/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring PNNI Routing
Integrating VNN OSPF and PNNI Networks
E.164 Native Address Advertisement
PNNI automatically advertises local E.164 Native addresses as well as E.164 Native
addresses reachable from VNN OSPF over the PNNI routing domain. To advertise
these addresses, PNNI converts the E.164 Native address format to the E.164 ATM
End System Address (AESA) format. This function allows Frame Relay addresses to
be advertised as ATM addresses across the ATM PNNI routing domain.
For information about address formats and routing options, see Chapter 17,
“Configuring SVC Parameters.”
Filtering PNNI and VNN OSPF Address Advertisements
You can partially or totally filter address advertisements between VNN OSPF and
PNNI routing domains, as described in the following sections.
Disabling PNNI/VNN Gateway Support
You can turn off PNNI/VNN gateway support on any gateway switch to prevent
addresses from being advertised between VNN OSPF and PNNI routing domains. To
turn off PNNI/VNN gateway support on a gateway switch, you can disable the node
global address sharing variables, VNN to PNNI and/or PNNI to VNN. (See Address
Sharing in Table 21-4 on page 21-44 for more information on the global variable
fields.)
Route Advertisement Suppression
You can filter, or suppress, specific ATM address or prefix advertisements between
adjacent VNN OSPF and PNNI routing domains by enabling the Suppress PNNI
and/or OSPF Advertisement parameter(s) when you configure ATM addresses or
prefixes. You must enable route advertisement suppression for the protocol of the
domain(s) where you want to suppress address advertisement.
For example, if the ATM prefix, 0x4711111111, is configured on a PNNI/VNN
gateway with Suppress PNNI Advertisement enabled, the switch will not advertise
any addresses that have this prefix in the PNNI domain. See Chapter 17, “Configuring
SVC Parameters,” for more information.
Connection Trace
You can use the Connection Trace feature to determine the logical nodes and logical
links traversed by an existing ATM circuit (PVC, SVC, or SPVC). Connection Trace
enables you to view the circuit path from the trace source node to the trace destination
node. Connection tracing is supported both in PNNI routing domains and in combined
PNNI/VNN networks.
For more information on Connection Trace, see the Switch Diagnostics User’s Guide
for CBX 3500, CBX 500, GX 550, and B-STDX 9000.
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