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Configuring PNNI Routing
Integrating VNN OSPF and PNNI Networks
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
1/19/05
21-17
Integrating VNN OSPF and PNNI Networks
The following sections describe how VNN networks, which use the Lucent OSPF
implementation, can integrate with PNNI networks through Lucent PNNI/VNN
gateway support.
PNNI/VNN Gateway Support
A PNNI/VNN gateway is a switch that is configured with both PNNI ATM NNI
logical ports and OSPF ATM Direct or OPTimum trunks. The PNNI/VNN gateway
switch connects to, and is a member of, both routing domains. PNNI/VNN gateway
support allows a VNN backbone network to interconnect PNNI regional networks, or
a PNNI backbone network to interconnect VNN OSPF regional networks. The
backbone network handles the internetworking traffic between all the regional
networks.
Importing Exterior Addresses
To activate dynamic routing over a backbone network of ATM circuits that terminate
in different regional networks, you must enable the Import Exterior Addresses field on
all PNNI/VNN gateway switches. Enabling this function allows addresses from one
regional network to be automatically routed across the backbone network to other
regional networks.
Once the addresses are imported, PNNI and VNN OSPF call interworking
automatically routes the ATM calls to the appropriate destinations, as described in the
following section.
If an SPVC originating on a B-STDX 9000 switch passes over an intermediate PNNI
link, the Import Exterior Addresses field must be enabled on all PNNI endpoints in the
link.
PNNI and VNN OSPF Call Interworking
CBX 500 and GX 550 switches support ATM call interworking between PNNI and
VNN OSPF routing domains. When addresses are shared between PNNI and VNN
OSPF routing domains, ATM call interworking dynamically routes ATM PVCs, ATM
SVCs, ATM point-to-point SPVCs, and ATM PMP PVCs across both domains. PNNI
and VNN OSPF call interworking is automatic, provided the switch is configured as a
PNNI node.
Interworking VNN ATM PVCs with PNNI
VNN ATM PVCs can be re-established over complete or partial PNNI paths without
reconfiguring the PVCs.
Содержание CBX 3500
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